More work on page anchor

Change xbm file header to fix strange accesspoint behaviour

lib/obp60task/OBPDataOperations.cpp

@@ -0,0 +1,158 @@
+#include "OBPDataOperations.h"
+
+double WindUtils::to2PI(double a)
+{
+    a = fmod(a, 2 * M_PI);
+    if (a < 0.0) {
+        a += 2 * M_PI;
+    }
+    return a;
+}
+
+double WindUtils::toPI(double a)
+{
+    a += M_PI;
+    a = to2PI(a);
+    a -= M_PI;
+
+    return a;
+}
+
+double WindUtils::to360(double a)
+{
+    a = fmod(a, 360);
+    if (a < 0.0) {
+        a += 360;
+    }
+    return a;
+}
+
+double WindUtils::to180(double a)
+{
+    a += 180;
+    a = to360(a);
+    a -= 180;
+
+    return a;
+}
+
+void WindUtils::toCart(const double* phi, const double* r, double* x, double* y)
+{
+    *x = *r * sin(*phi);
+    *y = *r * cos(*phi);
+}
+
+void WindUtils::toPol(const double* x, const double* y, double* phi, double* r)
+{
+    *phi = (M_PI / 2) - atan2(*y, *x);
+    *phi = to2PI(*phi);
+    *r = sqrt(*x * *x + *y * *y);
+}
+
+void WindUtils::addPolar(const double* phi1, const double* r1,
+    const double* phi2, const double* r2,
+    double* phi, double* r)
+{
+    double x1, y1, x2, y2;
+    toCart(phi1, r1, &x1, &y1);
+    toCart(phi2, r2, &x2, &y2);
+    x1 += x2;
+    y1 += y2;
+    toPol(&x1, &y1, phi, r);
+}
+
+void WindUtils::calcTwdSA(const double* AWA, const double* AWS,
+    const double* CTW, const double* STW, const double* HDT,
+    double* TWD, double* TWS, double* TWA)
+{
+    double awd = *AWA + *HDT;
+    awd = to2PI(awd);
+    double stw = -*STW;
+    //    Serial.println("\ncalcTwdSA: AWA: " + String(*AWA) + ", AWS: " + String(*AWS) + ", CTW: " + String(*CTW) + ", STW: " + String(*STW) + ", HDT: " + String(*HDT));
+    addPolar(&awd, AWS, CTW, &stw, TWD, TWS);
+
+    // Normalize TWD and TWA to 0-360°
+    *TWD = to2PI(*TWD);
+    *TWA = toPI(*TWD - *HDT);
+    //    Serial.println("calcTwdSA: TWD: " + String(*TWD) + ", TWS: " + String(*TWS));
+}
+
+bool WindUtils::calcTrueWind(const double* awaVal, const double* awsVal,
+    const double* cogVal, const double* stwVal, const double* sogVal, const double* hdtVal,
+    const double* hdmVal, const double* varVal, double* twdVal, double* twsVal, double* twaVal)
+{
+    double stw, hdt, ctw;
+    double twd, tws, twa;
+    static const double DBL_MIN = std::numeric_limits<double>::lowest();
+
+    if (*hdtVal != DBL_MIN) {
+        hdt = *hdtVal; // Use HDT if available
+    } else {
+        if (*hdmVal != DBL_MIN && *varVal != DBL_MIN) {
+            hdt = *hdmVal + *varVal; // Use corrected HDM if HDT is not available
+            hdt = to2PI(hdt);
+        } else if (*cogVal != DBL_MIN) {
+            hdt = *cogVal; // Use COG as fallback if HDT and HDM are not available
+        } else {
+            return false; // Cannot calculate without valid HDT or HDM
+        }
+    }
+
+    if (*cogVal != DBL_MIN) {
+        ctw = *cogVal; // Use COG as CTW if available
+        //    ctw = *cogVal + ((*cogVal - hdt) / 2); // Estimate CTW from COG
+    } else {
+        ctw = hdt; // 2nd approximation for CTW;
+        return false;
+    }
+
+    if (*stwVal != DBL_MIN) {
+        stw = *stwVal; // Use STW if available
+    } else if (*sogVal != DBL_MIN) {
+        stw = *sogVal;
+    } else {
+        // If STW and SOG are not available, we cannot calculate true wind
+        return false;
+    }
+
+    if ((*awaVal == DBL_MIN) || (*awsVal == DBL_MIN) || (*cogVal == DBL_MIN) || (*stwVal == DBL_MIN)) {
+        // Cannot calculate true wind without valid AWA, AWS, COG, or STW
+        return false;
+    } else {
+        calcTwdSA(awaVal, awsVal, &ctw, stwVal, &hdt, &twd, &tws, &twa);
+        *twdVal = twd;
+        *twsVal = tws;
+        *twaVal = twa;
+
+        return true;
+    }
+}
+
+void HstryBuf::fillWndBufSimData(tBoatHstryData& hstryBufs)
+// Fill most part of TWD and TWS history buffer with simulated data
+{
+    double value = 20.0;
+    int16_t value2 = 0;
+    for (int i = 0; i < 900; i++) {
+        value += random(-20, 20);
+        value = WindUtils::to360(value);
+        value2 = static_cast<int16_t>(value * DEG_TO_RAD * 1000);
+        hstryBufs.twdHstry->add(value2);
+    }
+}
+
+/* double genTwdSimDat()
+{
+    simTwd += random(-20, 20);
+    if (simTwd < 0.0)
+        simTwd += 360.0;
+    if (simTwd >= 360.0)
+        simTwd -= 360.0;
+
+    int16_t z = static_cast<int16_t>(DegToRad(simTwd) * 1000.0);
+    pageData.boatHstry.twdHstry->add(z); // Fill the buffer with some test data
+
+    simTws += random(-200, 150) / 10.0; // TWS value in knots
+    simTws = constrain(simTws, 0.0f, 50.0f); // Ensure TWS is between 0 and 50 knots
+    twsValue = simTws;
+}*/

lib/obp60task/OBPDataOperations.h

@@ -0,0 +1,36 @@
+#pragma once
+#include "GwApi.h"
+#include "OBPRingBuffer.h"
+#include <Arduino.h>
+#include <math.h>
+
+typedef struct {
+    RingBuffer<int16_t>* twdHstry;
+    RingBuffer<int16_t>* twsHstry;
+} tBoatHstryData; // Holds pointers to all history buffers for boat data
+
+class HstryBuf {
+
+public:
+    void fillWndBufSimData(tBoatHstryData& hstryBufs); // Fill most part of the TWD and TWS history buffer with simulated data
+};
+
+class WindUtils {
+
+public:
+    static double to2PI(double a);
+    static double toPI(double a);
+    static double to360(double a);
+    static double to180(double a);
+    static void toCart(const double* phi, const double* r, double* x, double* y);
+    static void toPol(const double* x, const double* y, double* phi, double* r);
+    static void addPolar(const double* phi1, const double* r1,
+        const double* phi2, const double* r2,
+        double* phi, double* r);
+    static void calcTwdSA(const double* AWA, const double* AWS,
+        const double* CTW, const double* STW, const double* HDT,
+        double* TWD, double* TWS, double* TWA);
+    static bool calcTrueWind(const double* awaVal, const double* awsVal,
+        const double* cogVal, const double* stwVal, const double* sogVal, const double* hdtVal,
+        const double* hdmVal, const double* varVal, double* twdVal, double* twsVal, double* twaVal);
+};

lib/obp60task/OBPRingBuffer.h

@@ -0,0 +1,60 @@
+#pragma once
+#include "GwSynchronized.h"
+#include <algorithm>
+#include <limits>
+#include <stdexcept>
+#include <vector>
+#include "WString.h"
+
+template <typename T>
+class RingBuffer {
+private:
+    mutable SemaphoreHandle_t bufLocker;
+    std::vector<T> buffer;
+    size_t capacity;
+    size_t head; // Points to the next insertion position
+    size_t first; // Points to the first (oldest) valid element
+    size_t last; // Points to the last (newest) valid element
+    size_t count; // Number of valid elements currently in buffer
+    bool is_Full; // Indicates that all buffer elements are used and ringing is in use
+    T MIN_VAL; // lowest possible value of buffer
+    T MAX_VAL; // highest possible value of buffer of type <T>
+
+    // metadata for buffer
+    String dataName; // Name of boat data in buffer
+    String dataFmt; // Format of boat data in buffer
+    int updFreq; // Update frequency in milliseconds
+    T smallest; // Value range of buffer: smallest value
+    T largest; // Value range of buffer: biggest value
+
+public:
+    RingBuffer(size_t size);
+    void setMetaData(String name, String format, int updateFrequency, T minValue, T maxValue); // Set meta data for buffer
+    bool getMetaData(String& name, String& format, int& updateFrequency, T& minValue, T& maxValue); // Get meta data of buffer
+    String getName() const; // Get buffer name
+    void add(const T& value); // Add a new value to  buffer
+    T get(size_t index) const; // Get value at specific position (0-based index from oldest to newest)
+    T getFirst() const; // Get the first (oldest) value in buffer
+    T getLast() const; // Get the last (newest) value in buffer
+    T getMin() const; // Get the lowest value in buffer
+    T getMin(size_t amount) const; // Get minimum value of the last <amount> values of buffer
+    T getMax() const; // Get the highest value in buffer
+    T getMax(size_t amount) const; // Get maximum value of the last <amount> values of buffer
+    T getMid() const; // Get mid value between <min> and <max> value in buffer
+    T getMid(size_t amount) const; // Get mid value between <min> and <max> value of the last <amount> values of buffer
+    T getMedian() const; // Get the median value in buffer
+    T getMedian(size_t amount) const; // Get the median value of the last <amount> values of buffer
+    size_t getCapacity() const; // Get the buffer capacity (maximum size)
+    size_t getCurrentSize() const; // Get the current number of elements in buffer
+    size_t getFirstIdx() const; // Get the index of oldest value in buffer
+    size_t getLastIdx() const; // Get the index of newest value in buffer
+    bool isEmpty() const; // Check if buffer is empty
+    bool isFull() const; // Check if buffer is full
+    T getMinVal() const; // Get lowest possible value for buffer; used for initialized buffer data
+    T getMaxVal() const; // Get highest possible value for buffer
+    void clear(); // Clear buffer
+    T operator[](size_t index) const; // Operator[] for convenient access (same as get())
+    std::vector<T> getAllValues() const; // Get all current values as a vector
+};
+
+#include "OBPRingBuffer.tpp"

lib/obp60task/OBPRingBuffer.tpp

@@ -0,0 +1,376 @@
+#include "OBPRingBuffer.h"
+
+template <typename T>
+RingBuffer<T>::RingBuffer(size_t size)
+    : capacity(size)
+    , head(0)
+    , first(0)
+    , last(0)
+    , count(0)
+    , is_Full(false)
+{
+    bufLocker = xSemaphoreCreateMutex();
+
+    if (size == 0) {
+        // return false;
+    }
+
+    MIN_VAL = std::numeric_limits<T>::lowest();
+    MAX_VAL = std::numeric_limits<T>::max();
+    dataName = "";
+    dataFmt = "";
+    updFreq = -1;
+    smallest = MIN_VAL;
+    largest = MAX_VAL;
+
+    buffer.resize(size, MIN_VAL);
+
+    // return true;
+}
+
+// Specify meta data of buffer content
+template <typename T>
+void RingBuffer<T>::setMetaData(String name, String format, int updateFrequency, T minValue, T maxValue)
+{
+    GWSYNCHRONIZED(&bufLocker);
+    dataName = name;
+    dataFmt = format;
+    updFreq = updateFrequency;
+    smallest = std::max(MIN_VAL, minValue);
+    largest = std::min(MAX_VAL, maxValue);
+}
+
+// Get meta data of buffer content
+template <typename T>
+bool RingBuffer<T>::getMetaData(String& name, String& format, int& updateFrequency, T& minValue, T& maxValue)
+{
+    if (dataName == "" || dataFmt == "" || updFreq == -1) {
+        return false; // Meta data not set
+    }
+
+    GWSYNCHRONIZED(&bufLocker);
+    name = dataName;
+    format = dataFmt;
+    updateFrequency = updFreq;
+    minValue = smallest;
+    maxValue = largest;
+    return true;
+}
+
+// Get buffer name
+template <typename T>
+String RingBuffer<T>::getName() const
+{
+    return dataName;
+}
+
+// Add a new value to buffer
+template <typename T>
+void RingBuffer<T>::add(const T& value)
+{
+    GWSYNCHRONIZED(&bufLocker);
+    if (value < smallest || value > largest) {
+        buffer[head] = MIN_VAL; // Store MIN_VAL if value is out of range
+    } else {
+        buffer[head] = value;
+    }
+    last = head;
+
+    if (is_Full) {
+        first = (first + 1) % capacity; // Move pointer to oldest element when overwriting
+    } else {
+        count++;
+        if (count == capacity) {
+            is_Full = true;
+        }
+    }
+
+    head = (head + 1) % capacity;
+}
+
+// Get value at specific position (0-based index from oldest to newest)
+template <typename T>
+T RingBuffer<T>::get(size_t index) const
+{
+    GWSYNCHRONIZED(&bufLocker);
+    if (isEmpty() || index < 0 || index >= count) {
+        return MIN_VAL;
+    }
+
+    size_t realIndex = (first + index) % capacity;
+    return buffer[realIndex];
+}
+
+// Operator[] for convenient access (same as get())
+template <typename T>
+T RingBuffer<T>::operator[](size_t index) const
+{
+    return get(index);
+}
+
+// Get the first (oldest) value in the buffer
+template <typename T>
+T RingBuffer<T>::getFirst() const
+{
+    if (isEmpty()) {
+        return MIN_VAL;
+    }
+    return get(0);
+}
+
+// Get the last (newest) value in the buffer
+template <typename T>
+T RingBuffer<T>::getLast() const
+{
+    if (isEmpty()) {
+        return MIN_VAL;
+    }
+    return get(count - 1);
+}
+
+// Get the lowest value in the buffer
+template <typename T>
+T RingBuffer<T>::getMin() const
+{
+    if (isEmpty()) {
+        return MIN_VAL;
+    }
+
+    T minVal = MAX_VAL;
+    T value;
+    for (size_t i = 0; i < count; i++) {
+        value = get(i);
+        if (value < minVal && value != MIN_VAL) {
+            minVal = value;
+        }
+    }
+    return minVal;
+}
+
+// Get minimum value of the last <amount> values of buffer
+template <typename T>
+T RingBuffer<T>::getMin(size_t amount) const
+{
+    if (isEmpty() || amount <= 0) {
+        return MIN_VAL;
+    }
+    if (amount > count)
+        amount = count;
+
+    T minVal = MAX_VAL;
+    T value;
+    for (size_t i = 0; i < amount; i++) {
+        value = get(count - 1 - i);
+        if (value < minVal && value != MIN_VAL) {
+            minVal = value;
+        }
+    }
+    return minVal;
+}
+
+// Get the highest value in the buffer
+template <typename T>
+T RingBuffer<T>::getMax() const
+{
+    if (isEmpty()) {
+        return MIN_VAL;
+    }
+
+    T maxVal = MIN_VAL;
+    T value;
+    for (size_t i = 0; i < count; i++) {
+        value = get(i);
+        if (value > maxVal && value != MIN_VAL) {
+            maxVal = value;
+        }
+    }
+    return maxVal;
+}
+
+// Get maximum value of the last <amount> values of buffer
+template <typename T>
+T RingBuffer<T>::getMax(size_t amount) const
+{
+    if (isEmpty() || amount <= 0) {
+        return MIN_VAL;
+    }
+    if (amount > count)
+        amount = count;
+
+    T maxVal = MIN_VAL;
+    T value;
+    for (size_t i = 0; i < amount; i++) {
+        value = get(count - 1 - i);
+        if (value > maxVal && value != MIN_VAL) {
+            maxVal = value;
+        }
+    }
+    return maxVal;
+}
+
+// Get mid value between <min> and <max> value in the buffer
+template <typename T>
+T RingBuffer<T>::getMid() const
+{
+    if (isEmpty()) {
+        return MIN_VAL;
+    }
+
+    return (getMin() + getMax()) / static_cast<T>(2);
+}
+
+// Get mid value between <min> and <max> value of the last <amount> values of buffer
+template <typename T>
+T RingBuffer<T>::getMid(size_t amount) const
+{
+    if (isEmpty() || amount <= 0) {
+        return MIN_VAL;
+    }
+
+    if (amount > count)
+        amount = count;
+
+    return (getMin(amount) + getMax(amount)) / static_cast<T>(2);
+}
+
+// Get the median value in the buffer
+template <typename T>
+T RingBuffer<T>::getMedian() const
+{
+    if (isEmpty()) {
+        return MIN_VAL;
+    }
+
+    // Create a temporary vector with current valid elements
+    std::vector<T> temp;
+    temp.reserve(count);
+
+    for (size_t i = 0; i < count; i++) {
+        temp.push_back(get(i));
+    }
+
+    // Sort to find median
+    std::sort(temp.begin(), temp.end());
+
+    if (count % 2 == 1) {
+        // Odd number of elements
+        return temp[count / 2];
+    } else {
+        // Even number of elements - return average of middle two
+        // Note: For integer types, this truncates. For floating point, it's exact.
+        return (temp[count / 2 - 1] + temp[count / 2]) / 2;
+    }
+}
+
+// Get the median value of the last <amount> values of buffer
+template <typename T>
+T RingBuffer<T>::getMedian(size_t amount) const
+{
+    if (isEmpty() || amount <= 0) {
+        return MIN_VAL;
+    }
+    if (amount > count)
+        amount = count;
+
+    // Create a temporary vector with current valid elements
+    std::vector<T> temp;
+    temp.reserve(amount);
+
+    for (size_t i = 0; i < amount; i++) {
+        temp.push_back(get(i));
+    }
+
+    // Sort to find median
+    std::sort(temp.begin(), temp.end());
+
+    if (amount % 2 == 1) {
+        // Odd number of elements
+        return temp[amount / 2];
+    } else {
+        // Even number of elements - return average of middle two
+        // Note: For integer types, this truncates. For floating point, it's exact.
+        return (temp[amount / 2 - 1] + temp[amount / 2]) / 2;
+    }
+}
+
+// Get the buffer capacity (maximum size)
+template <typename T>
+size_t RingBuffer<T>::getCapacity() const
+{
+    return capacity;
+}
+
+// Get the current number of elements in the buffer
+template <typename T>
+size_t RingBuffer<T>::getCurrentSize() const
+{
+    return count;
+}
+
+// Get the first index of buffer
+template <typename T>
+size_t RingBuffer<T>::getFirstIdx() const
+{
+    return first;
+}
+
+// Get the last index of buffer
+template <typename T>
+size_t RingBuffer<T>::getLastIdx() const
+{
+    return last;
+}
+
+// Check if buffer is empty
+template <typename T>
+bool RingBuffer<T>::isEmpty() const
+{
+    return count == 0;
+}
+
+// Check if buffer is full
+template <typename T>
+bool RingBuffer<T>::isFull() const
+{
+    return is_Full;
+}
+
+// Get lowest possible value for buffer; used for non-set buffer data
+template <typename T>
+T RingBuffer<T>::getMinVal() const
+{
+    return MIN_VAL;
+}
+
+// Get highest possible value for buffer
+template <typename T>
+T RingBuffer<T>::getMaxVal() const
+{
+    return MAX_VAL;
+}
+
+// Clear buffer
+template <typename T>
+void RingBuffer<T>::clear()
+{
+    GWSYNCHRONIZED(&bufLocker);
+    head = 0;
+    first = 0;
+    last = 0;
+    count = 0;
+    is_Full = false;
+}
+
+// Get all current values as a vector
+template <typename T>
+std::vector<T> RingBuffer<T>::getAllValues() const
+{
+    std::vector<T> result;
+    result.reserve(count);
+
+    for (size_t i = 0; i < count; i++) {
+        result.push_back(get(i));
+    }
+
+    return result;
+}

lib/obp60task/PageAnchor.cpp

@@ -0,0 +1,249 @@
+#if defined BOARD_OBP60S3 || defined BOARD_OBP40S3
+
+#include "Pagedata.h"
+#include "OBP60Extensions.h"
+
+/*
+  Anchor overview with additional associated data
+  This page is in experimental stage so be warned!
+  North is up.
+
+  Boatdata used
+    DBS - Water depth
+    HDT - Boat heading
+    AWS - Wind strength; Boat not moving so we assume AWS=TWS and AWD=TWD
+    AWD - Wind direction
+    LAT/LON - Boat position, current
+    HDOP - Position error
+
+  This is the fist page to contain a configuration page with 
+  data entry option.
+  Also it will make use of the new alarm function.
+
+  Data
+    Anchor position lat/lon
+    Depth at anchor position
+    Chain length used
+    Boat position current
+    Depth at boat position
+    Boat heading
+    Wind direction
+    Wind strength
+    Alarm j/n
+    Alarm radius
+    GPS position error
+    Timestamp while dropping anchor
+
+   Drop / raise function in device OBP40 has to be done inside 
+   config mode because of limited number of buttons.
+
+*/
+
+#define anchor_width 16
+#define anchor_height 16
+static unsigned char anchor_bits[] = {
+   0x80, 0x01, 0x40, 0x02, 0x40, 0x02, 0x80, 0x01, 0xf0, 0x0f, 0x80, 0x01,
+   0x80, 0x01, 0x88, 0x11, 0x8c, 0x31, 0x8e, 0x71, 0x84, 0x21, 0x86, 0x61,
+   0x86, 0x61, 0xfc, 0x3f, 0xf8, 0x1f, 0x80, 0x01 };
+
+class PageAnchor : public Page
+{
+    private:
+    GwConfigHandler *config;
+    GwLog *logger;
+    bool simulation = false;
+    bool holdvalues = false;
+    String flashLED;
+    String backlightMode;
+
+    bool alarm = false;
+    bool alarm_enabled = false;
+    uint8_t alarm_range;
+
+    uint8_t chain_length;
+    uint8_t chain;
+
+    bool anchor_set = false;
+    double anchor_lat;
+    double anchor_lon;
+    double anchor_depth;
+    int anchor_ts; // time stamp anchor dropped
+
+    char mode = 'N'; // (N)ormal, (C)onfig
+
+    void displayModeNormal(PageData &pageData) {
+
+        // Boatvalues: DBS, HDT, AWS, AWD, LAT, LON, HDOP
+        GwApi::BoatValue *bv_dbs = pageData.values[0]; // DBS
+        String sval_dbs = formatValue(bv_dbs, *commonData).svalue;
+        GwApi::BoatValue *bv_hdt = pageData.values[1]; // HDT
+        String sval_hdt = formatValue(bv_hdt, *commonData).svalue;
+        GwApi::BoatValue *bv_aws = pageData.values[2]; // AWS
+        String sval_aws = formatValue(bv_aws, *commonData).svalue;
+        GwApi::BoatValue *bv_awd = pageData.values[3]; // AWD
+        String sval_awd = formatValue(bv_awd, *commonData).svalue;
+        GwApi::BoatValue *bv_lat = pageData.values[4]; // LAT
+        String sval_lat = formatValue(bv_lat, *commonData).svalue;
+        GwApi::BoatValue *bv_lon = pageData.values[5]; // LON
+        String sval_lon = formatValue(bv_lon, *commonData).svalue;
+        GwApi::BoatValue *bv_hdop = pageData.values[6]; // HDOP
+        String sval_hdop = formatValue(bv_hdop, *commonData).svalue;
+
+        Point c = {200, 150}; // center = anchor position
+        uint16_t r = 125;
+
+        Point b = {200, 180}; // boat position while dropping anchor
+
+        std::vector<Point> pts_boat = { // polygon lines
+            {b.x - 5, b.y},
+            {b.x - 5, b.y - 10},
+            {b.x, b.y - 16},
+            {b.x + 5, b.y - 10}
+        };
+        //rotatePoints und dann Linien zeichnen
+        // TODO rotate boat according to current heading
+        //fillPoly4(rotatePoints(c, pts, RadToDeg(value2)), commonData->fgcolor);
+
+        // Draw wind arrow
+        /*
+        if self._bd.awa.value:
+            p = ((cx, cy - r + 25), (cx - 12, cy - r - 4), (cx, cy - r + 6), (cx + 12, cy - r - 4), (cx, cy - r + 25))
+            wind = self.rotate((cx, cy), p, self._bd.awa.value)
+            ctx.move_to(*wind[0])
+            for point in wind[1:]:
+                ctx.line_to(*point)
+            ctx.fill()
+        */
+
+        // Title and corner value headings
+        getdisplay().setTextColor(commonData->fgcolor);
+        getdisplay().setFont(&Ubuntu_Bold10pt8b);
+        getdisplay().setCursor(8, 48);
+        getdisplay().print("Anchor");
+
+        getdisplay().setCursor(8, 200);
+        getdisplay().print("Depth");
+
+        drawTextRalign(392, 50, "Chain");
+        drawTextRalign(392, 200, "Wind");
+
+        // Corner values
+        getdisplay().setFont(&Ubuntu_Bold8pt8b);
+        getdisplay().setCursor(2, 70);
+        getdisplay().print("Alarm: ");
+        getdisplay().print(alarm_enabled ? "On" : "Off");
+        
+        // Units
+
+        // Values
+        getdisplay().setFont(&DSEG7Classic_BoldItalic20pt7b);
+        // Depth
+        getdisplay().setCursor(8, 250);
+        //getdisplay().print(sval_dbs);
+        getdisplay().print("6.4");
+        // Wind
+        getdisplay().setCursor(320, 250);
+        //getdisplay().print(sval_aws);
+        getdisplay().print("12");
+
+        getdisplay().drawCircle(c.x, c.y, r, commonData->fgcolor);
+ 
+        // draw anchor symbol (as bitmap)
+        getdisplay().drawXBitmap(c.x - anchor_width / 2, c.y - anchor_height / 2,
+                                 anchor_bits, anchor_width, anchor_height, commonData->fgcolor);
+
+    }
+
+    void displayModeConfig() {
+        getdisplay().setTextColor(commonData->fgcolor);
+        getdisplay().setFont(&Ubuntu_Bold12pt8b);
+        getdisplay().setCursor(8, 48);
+        getdisplay().print("Anchor configuration");
+    }
+
+    public:
+    PageAnchor(CommonData &common){
+        commonData = &common;
+        config = commonData->config;
+        logger = commonData->logger;
+        logger->logDebug(GwLog::LOG,"Instantiate PageAnchor");
+
+        // preload configuration data
+        simulation = config->getBool(config->useSimuData);
+        holdvalues = config->getBool(config->holdvalues);
+        flashLED = config->getString(config->flashLED);
+        backlightMode = config->getString(config->backlight);
+        chainLength = config->getInt(config->chainLength);
+       
+        chain = 0;
+        anchor_set = false;
+     }
+
+    void setupKeys(){
+        Page::setupKeys();
+        commonData->keydata[0].label = "MODE";
+        commonData->keydata[1].label = "ALARM";
+    }
+
+    int handleKey(int key){
+        if (key == 1) { // Switch between normal and config mode
+            if (mode == 'N') {
+                mode = 'C';
+            } else {
+                mode = 'N';
+            }
+            return 0;
+        }
+        if (key == 2) { // Toggle alarm
+            alarm_enabled = !alarm_enabled;
+            return 0;
+        }
+        if (key == 11) { // Code for keylock
+            commonData->keylock = !commonData->keylock;
+            return 0;
+        }
+        return key;
+    }
+
+    void displayNew(PageData &pageData){
+    };
+
+    int displayPage(PageData &pageData){
+
+        // Logging boat values
+        LOG_DEBUG(GwLog::LOG,"Drawing at PageAnchor");
+        LOG_DEBUG(GwLog::LOG,"Drawing at PageAnchor; Mode=%c", mode);
+
+        // Set display in partial refresh mode
+        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+
+       if (mode == 'N') {
+           displayModeNormal(pageData);
+       } else if (mode == 'C') {
+           displayModeConfig();
+       }
+
+        return PAGE_UPDATE;
+    };
+};
+
+static Page *createPage(CommonData &common){
+    return new PageAnchor(common);
+}
+
+/**
+ * with the code below we make this page known to the PageTask
+ * we give it a type (name) that can be selected in the config
+ * we define which function is to be called
+ * and we provide the number of user parameters we expect
+ * this will be number of BoatValue pointers in pageData.values
+ */
+PageDescription registerPageAnchor(
+    "Anchor",   // Page name
+    createPage, // Action
+    0,          // Number of bus values depends on selection in Web configuration
+    {"DBS", "HDT", "AWS", "AWD", "LAT", "LON", "HDOP"}, // Names of bus values undepends on selection in Web configuration (refer GwBoatData.h)
+    true        // Show display header on/off
+);
+
+#endif

lib/obp60task/PageWindPlot.cpp

@@ -0,0 +1,489 @@
+#if defined BOARD_OBP60S3 || defined BOARD_OBP40S3
+
+#include "BoatDataCalibration.h"
+#include "OBP60Extensions.h"
+#include "OBPRingBuffer.h"
+#include "Pagedata.h"
+#include <vector>
+
+static const double radToDeg = 180.0 / M_PI; // Conversion factor from radians to degrees
+
+// Get maximum difference of last <amount> of TWD ringbuffer values to center chart
+int getRng(const RingBuffer<int16_t>& windDirHstry, int center, size_t amount)
+{
+    int minVal = windDirHstry.getMinVal();
+    size_t count = windDirHstry.getCurrentSize();
+    //    size_t capacity = windDirHstry.getCapacity();
+    //    size_t last = windDirHstry.getLastIdx();
+
+    if (windDirHstry.isEmpty() || amount <= 0) {
+        return minVal;
+    }
+    if (amount > count)
+        amount = count;
+
+    int value = 0;
+    int rng = 0;
+    int maxRng = minVal;
+    // Start from the newest value (last) and go backwards x times
+    for (size_t i = 0; i < amount; i++) {
+        //        value = windDirHstry.get(((last - i) % capacity + capacity) % capacity);
+        value = windDirHstry.get(count - 1 - i);
+
+        if (value == minVal) {
+            continue;
+        }
+
+        value = value / 1000.0 * radToDeg;
+        rng = abs(((value - center + 540) % 360) - 180);
+        if (rng > maxRng)
+            maxRng = rng;
+    }
+    if (maxRng > 180) {
+        maxRng = 180;
+    }
+
+    return maxRng;
+}
+
+// ****************************************************************
+class PageWindPlot : public Page {
+
+    bool keylock = false; // Keylock
+    char chrtMode = 'D'; // Chart mode: 'D' for TWD, 'S' for TWS, 'B' for both
+    int dataIntv = 1; // Update interval for wind history chart:
+                      // (1)|(2)|(3)|(4) seconds for approx. 4, 8, 12, 16 min. history chart
+    bool showTWS = true; // Show TWS value in chart area
+
+public:
+    PageWindPlot(CommonData& common)
+    {
+        commonData = &common;
+        common.logger->logDebug(GwLog::LOG, "Instantiate PageWindPlot");
+    }
+
+    virtual void setupKeys()
+    {
+        Page::setupKeys();
+        //        commonData->keydata[0].label = "MODE";
+        commonData->keydata[1].label = "INTV";
+        commonData->keydata[4].label = "TWS";
+    }
+
+    // Key functions
+    virtual int handleKey(int key)
+    {
+        // Set chart mode TWD | TWS -> to be implemented
+        if (key == 1) {
+            if (chrtMode == 'D') {
+                chrtMode = 'S';
+            } else if (chrtMode == 'S') {
+                chrtMode = 'B';
+            } else {
+                chrtMode = 'D';
+            }
+            return 0; // Commit the key
+        }
+
+        // Set interval for wind history chart update time
+        if (key == 2) {
+            if (dataIntv == 1) {
+                dataIntv = 2;
+            } else if (dataIntv == 2) {
+                dataIntv = 3;
+            } else if (dataIntv == 3) {
+                dataIntv = 4;
+            } else {
+                dataIntv = 1;
+            }
+            return 0; // Commit the key
+        }
+
+        // Switch TWS on/off
+        if (key == 5) {
+            showTWS = !showTWS;
+            return 0; // Commit the key
+        }
+
+        // Keylock function
+        if (key == 11) { // Code for keylock
+            commonData->keylock = !commonData->keylock;
+            return 0; // Commit the key
+        }
+        return key;
+    }
+
+    int displayPage(PageData& pageData)
+    {
+        GwConfigHandler* config = commonData->config;
+        GwLog* logger = commonData->logger;
+
+        float twsValue; // TWS value in chart area
+        static String twdName, twdUnit; // TWD name and unit
+        static int updFreq; // Update frequency for TWD
+        static int16_t twdLowest, twdHighest; // TWD range
+        // static int16_t twdBufMinVal; // lowest possible twd buffer value; used for non-set data
+
+        // current boat data values; TWD only for validation test, TWS for display of current value
+        const int numBoatData = 2;
+        GwApi::BoatValue* bvalue;
+        String BDataName[numBoatData];
+        double BDataValue[numBoatData];
+        bool BDataValid[numBoatData];
+        String BDataText[numBoatData];
+        String BDataUnit[numBoatData];
+        String BDataFormat[numBoatData];
+
+        static bool isInitialized = false; // Flag to indicate that page is initialized
+        static bool wndDataValid = false; // Flag to indicate if wind data is valid
+        static int numNoData; // Counter for multiple invalid data values in a row
+        static bool simulation = false;
+        static bool holdValues = false;
+
+        static int width; // Screen width
+        static int height; // Screen height
+        static int xCenter; // Center of screen in x direction
+        static const int yOffset = 48; // Offset for y coordinates of chart area
+        static int cHeight; // height of chart area
+        static int bufSize; // History buffer size: 960 values for appox. 16 min. history chart
+        static int intvBufSize; // Buffer size used for currently selected time interval
+        int count; // current size of buffer
+        static int numWndVals; // number of wind values available for current interval selection
+        static int bufStart; // 1st data value in buffer to show
+        int numAddedBufVals; // Number of values added to buffer since last display
+        size_t currIdx; // Current index in TWD history buffer
+        static size_t lastIdx; // Last index of TWD history buffer
+        static size_t lastAddedIdx = 0; // Last index of TWD history buffer when new data was added
+        static int oldDataIntv; // remember recent user selection of data interval
+
+        static int wndCenter; // chart wind center value position
+        static int wndLeft; // chart wind left value position
+        static int wndRight; // chart wind right value position
+        static int chrtRng; // Range of wind values from mid wind value to min/max wind value in degrees
+        int diffRng; // Difference between mid and current wind value
+        static const int dfltRng = 40; // Default range for chart
+        int midWndDir; // New value for wndCenter after chart start / shift
+        static int simTwd; // Simulation value for TWD
+        static float simTws; // Simulation value for TWS
+
+        int x, y; // x and y coordinates for drawing
+        static int prevX, prevY; // Last x and y coordinates for drawing
+        static float chrtScl; // Scale for wind values in pixels per degree
+        int chrtVal; // Current wind value
+        static int chrtPrevVal; // Last wind value in chart area for check if value crosses 180 degree line
+
+        LOG_DEBUG(GwLog::LOG, "Display page WindPlot");
+
+        // Get config data
+        simulation = config->getBool(config->useSimuData);
+        holdValues = config->getBool(config->holdvalues);
+        String flashLED = config->getString(config->flashLED);
+        String backlightMode = config->getString(config->backlight);
+
+        if (!isInitialized) {
+            width = getdisplay().width();
+            height = getdisplay().height();
+            xCenter = width / 2;
+            cHeight = height - yOffset - 22;
+            bufSize = pageData.boatHstry.twdHstry->getCapacity();
+            numNoData = 0;
+            simTwd = pageData.boatHstry.twdHstry->getLast() / 1000.0 * radToDeg;
+            simTws = 0;
+            twsValue = 0;
+            bufStart = 0;
+            oldDataIntv = 0;
+            numAddedBufVals, currIdx, lastIdx = 0;
+            lastAddedIdx = pageData.boatHstry.twdHstry->getLastIdx();
+            pageData.boatHstry.twdHstry->getMetaData(twdName, twdUnit, updFreq, twdLowest, twdHighest);
+            wndCenter = INT_MIN;
+            midWndDir = 0;
+            diffRng = dfltRng;
+            chrtRng = dfltRng;
+
+            isInitialized = true; // Set flag to indicate that page is now initialized
+        }
+
+        // read boat data values; TWD only for validation test, TWS for display of current value
+        for (int i = 0; i < numBoatData; i++) {
+            bvalue = pageData.values[i];
+            // BDataName[i] = xdrDelete(bvalue->getName());
+            BDataName[i] = BDataName[i].substring(0, 6); // String length limit for value name
+            calibrationData.calibrateInstance(bvalue, logger); // Check if boat data value is to be calibrated
+            BDataValue[i] = bvalue->value; // Value as double in SI unit
+            BDataValid[i] = bvalue->valid;
+            BDataText[i] = formatValue(bvalue, *commonData).svalue; // Formatted value as string including unit conversion and switching decimal places
+            BDataUnit[i] = formatValue(bvalue, *commonData).unit;
+            BDataFormat[i] = bvalue->getFormat(); // Unit of value
+        }
+
+        // Optical warning by limit violation (unused)
+        if (String(flashLED) == "Limit Violation") {
+            setBlinkingLED(false);
+            setFlashLED(false);
+        }
+
+        // Identify buffer size and buffer start position for chart
+        count = pageData.boatHstry.twdHstry->getCurrentSize();
+        currIdx = pageData.boatHstry.twdHstry->getLastIdx();
+        numAddedBufVals = (currIdx - lastAddedIdx + bufSize) % bufSize; // Number of values added to buffer since last display
+        if (dataIntv != oldDataIntv || count == 1) {
+            // new data interval selected by user
+            intvBufSize = cHeight * dataIntv;
+            numWndVals = min(count, (cHeight - 60) * dataIntv);
+            bufStart = max(0, count - numWndVals);
+            lastAddedIdx = currIdx;
+            oldDataIntv = dataIntv;
+        } else {
+            numWndVals = numWndVals + numAddedBufVals;
+            lastAddedIdx = currIdx;
+            if (count == bufSize) {
+                bufStart = max(0, bufStart - numAddedBufVals);
+            }
+        }
+        LOG_DEBUG(GwLog::DEBUG, "PageWindPlot Dataset: count: %d, TWD: %.0f, TWS: %.1f, TWD_valid? %d, intvBufSize: %d, numWndVals: %d, bufStart: %d, numAddedBufVals: %d, lastIdx: %d, old: %d, act: %d",
+            count, pageData.boatHstry.twdHstry->getLast() / 1000.0 * radToDeg, pageData.boatHstry.twsHstry->getLast() / 10.0 * 1.94384, BDataValid[0],
+            intvBufSize, numWndVals, bufStart, numAddedBufVals, pageData.boatHstry.twdHstry->getLastIdx(), oldDataIntv, dataIntv);
+
+        // Set wndCenter from 1st real buffer value
+        if (wndCenter == INT_MIN || (wndCenter == 0 && count == 1)) {
+            midWndDir = pageData.boatHstry.twdHstry->getMid(numWndVals);
+            if (midWndDir != INT16_MIN) {
+                midWndDir = midWndDir / 1000.0 * radToDeg;
+                wndCenter = int((midWndDir + (midWndDir >= 0 ? 5 : -5)) / 10) * 10; // Set new center value; round to nearest 10 degree value
+            } else {
+                wndCenter = 0;
+            }
+            LOG_DEBUG(GwLog::DEBUG, "PageWindPlot Range Init: count: %d, TWD: %.0f, wndCenter: %d, diffRng: %d, chrtRng: %d", count, pageData.boatHstry.twdHstry->getLast() / 1000.0 * radToDeg,
+                wndCenter, diffRng, chrtRng);
+        } else {
+            // check and adjust range between left, center, and right chart limit
+            diffRng = getRng(*pageData.boatHstry.twdHstry, wndCenter, numWndVals);
+            diffRng = (diffRng == INT16_MIN ? 0 : diffRng);
+            if (diffRng > chrtRng) {
+                chrtRng = int((diffRng + (diffRng >= 0 ? 9 : -1)) / 10) * 10; // Round up to next 10 degree value
+            } else if (diffRng + 10 < chrtRng) { // Reduce chart range for higher resolution if possible
+                chrtRng = max(dfltRng, int((diffRng + (diffRng >= 0 ? 9 : -1)) / 10) * 10);
+            }
+        }
+        chrtScl = float(width) / float(chrtRng) / 2.0; // Chart scale: pixels per degree
+        wndLeft = wndCenter - chrtRng;
+        if (wndLeft < 0)
+            wndLeft += 360;
+        wndRight = (chrtRng < 180 ? wndCenter + chrtRng : wndCenter + chrtRng - 1);
+        if (wndRight >= 360)
+            wndRight -= 360;
+
+        // Draw page
+        //***********************************************************************
+
+        // Set display in partial refresh mode
+        getdisplay().setPartialWindow(0, 0, width, height); // Set partial update
+        getdisplay().setTextColor(commonData->fgcolor);
+
+        // chart lines
+        getdisplay().fillRect(0, yOffset, width, 2, commonData->fgcolor);
+        getdisplay().fillRect(xCenter, yOffset, 1, cHeight, commonData->fgcolor);
+
+        // chart labels
+        char sWndLbl[4]; // char buffer for Wind angle label
+        getdisplay().setFont(&Ubuntu_Bold12pt8b);
+        getdisplay().setCursor(xCenter - 88, yOffset - 3);
+        getdisplay().print("TWD"); // Wind data name
+        snprintf(sWndLbl, 4, "%03d", (wndCenter < 0) ? (wndCenter + 360) : wndCenter);
+        drawTextCenter(xCenter, yOffset - 11, sWndLbl);
+        getdisplay().drawCircle(xCenter + 25, yOffset - 17, 2, commonData->fgcolor); // <degree> symbol
+        getdisplay().drawCircle(xCenter + 25, yOffset - 17, 3, commonData->fgcolor); // <degree> symbol
+        getdisplay().setCursor(1, yOffset - 3);
+        snprintf(sWndLbl, 4, "%03d", (wndLeft < 0) ? (wndLeft + 360) : wndLeft);
+        getdisplay().print(sWndLbl); // Wind left value
+        getdisplay().drawCircle(46, yOffset - 17, 2, commonData->fgcolor); // <degree> symbol
+        getdisplay().drawCircle(46, yOffset - 17, 3, commonData->fgcolor); // <degree> symbol
+        getdisplay().setCursor(width - 50, yOffset - 3);
+        snprintf(sWndLbl, 4, "%03d", (wndRight < 0) ? (wndRight + 360) : wndRight);
+        getdisplay().print(sWndLbl); // Wind right value
+        getdisplay().drawCircle(width - 5, yOffset - 17, 2, commonData->fgcolor); // <degree> symbol
+        getdisplay().drawCircle(width - 5, yOffset - 17, 3, commonData->fgcolor); // <degree> symbol
+
+        if (pageData.boatHstry.twdHstry->getMax() == pageData.boatHstry.twdHstry->getMinVal()) {
+            // only <INT16_MIN> values in buffer -> no valid wind data available
+            wndDataValid = false;
+        } else if (!BDataValid[0]) {
+            // currently no valid TWD data available
+            numNoData++;
+            wndDataValid = true;
+            if (numNoData > 3) {
+                // If more than 4 invalid values in a row, send message
+                wndDataValid = false;
+            }
+        } else {
+            numNoData = 0; // reset data error counter
+            wndDataValid = true; // At least some wind data available
+        }
+        // Draw wind values in chart
+        //***********************************************************************
+        if (wndDataValid) {
+            for (int i = 0; i < (numWndVals / dataIntv); i++) {
+                chrtVal = static_cast<int>(pageData.boatHstry.twdHstry->get(bufStart + (i * dataIntv))); // show the latest wind values in buffer; keep 1st value constant in a rolling buffer
+                if (chrtVal == INT16_MIN) {
+                    chrtPrevVal = INT16_MIN;
+                    /* if (i == linesToShow - 1) {
+                        numNoData++;
+                        // If more than 4 invalid values in a row, reset chart
+                    } else {
+                        numNoData = 0; // Reset invalid value counter
+                    }
+                    if (numNoData > 4) {
+                        // If more than 4 invalid values in a row, send message
+                        getdisplay().setFont(&Ubuntu_Bold10pt8b);
+                        getdisplay().fillRect(xCenter - 66, height / 2 - 20, 146, 24, commonData->bgcolor); // Clear area for TWS value
+                        drawTextCenter(xCenter, height / 2 - 10, "No sensor data");
+                    } */
+                } else {
+                    chrtVal = static_cast<int>((chrtVal / 1000.0 * radToDeg) + 0.5); // Convert to degrees and round
+                    x = ((chrtVal - wndLeft + 360) % 360) * chrtScl;
+                    y = yOffset + cHeight - i; // Position in chart area
+
+                    if (i >= (numWndVals / dataIntv) - 10)
+                        LOG_DEBUG(GwLog::DEBUG, "PageWindPlot Chart: i: %d, chrtVal: %d, bufStart: %d, count: %d, linesToShow: %d", i, chrtVal, bufStart, count, (numWndVals / dataIntv));
+
+                    if ((i == 0) || (chrtPrevVal == INT16_MIN)) {
+                        // just a dot for 1st chart point or after some invalid values
+                        prevX = x;
+                        prevY = y;
+                    } else {
+                        // cross borders check; shift values to [-180..0..180]; when crossing borders, range is 2x 180 degrees
+                        int wndLeftDlt = -180 - ((wndLeft >= 180) ? (wndLeft - 360) : wndLeft);
+                        int chrtVal180 = ((chrtVal + wndLeftDlt + 180) % 360 + 360) % 360 - 180;
+                        int chrtPrevVal180 = ((chrtPrevVal + wndLeftDlt + 180) % 360 + 360) % 360 - 180;
+                        if (((chrtPrevVal180 >= -180) && (chrtPrevVal180 < -90) && (chrtVal180 > 90)) || ((chrtPrevVal180 <= 179) && (chrtPrevVal180 > 90) && chrtVal180 <= -90)) {
+                            // If current value crosses chart borders compared to previous value, split line
+                            int xSplit = (((chrtPrevVal180 > 0 ? wndRight : wndLeft) - wndLeft + 360) % 360) * chrtScl;
+                            getdisplay().drawLine(prevX, prevY, xSplit, y, commonData->fgcolor);
+                            getdisplay().drawLine(prevX, prevY - 1, ((xSplit != prevX) ? xSplit : xSplit - 1), ((xSplit != prevX) ? y - 1 : y), commonData->fgcolor);
+                            prevX = (((chrtVal180 > 0 ? wndRight : wndLeft) - wndLeft + 360) % 360) * chrtScl;
+                        }
+                    }
+
+                    // Draw line with 2 pixels width + make sure vertical line are drawn correctly
+                    getdisplay().drawLine(prevX, prevY, x, y, commonData->fgcolor);
+                    getdisplay().drawLine(prevX, prevY - 1, ((x != prevX) ? x : x - 1), ((x != prevX) ? y - 1 : y), commonData->fgcolor);
+                    chrtPrevVal = chrtVal;
+                    prevX = x;
+                    prevY = y;
+                }
+                // Reaching chart area top end
+                if (i >= (cHeight - 1)) {
+                    oldDataIntv = 0; // force reset of buffer start and number of values to show in next display loop
+
+                    int minWndDir = pageData.boatHstry.twdHstry->getMin(numWndVals) / 1000.0 * radToDeg;
+                    int maxWndDir = pageData.boatHstry.twdHstry->getMax(numWndVals) / 1000.0 * radToDeg;
+                    LOG_DEBUG(GwLog::DEBUG, "PageWindPlot FreeTop: Minimum: %d, Maximum: %d, OldwndCenter: %d", minWndDir, maxWndDir, wndCenter);
+                    if ((minWndDir + 540 >= wndCenter + 540) || (maxWndDir + 540 <= wndCenter + 540)) {
+                        // Check if all wind value are left or right of center value -> optimize chart range
+                        midWndDir = pageData.boatHstry.twdHstry->getMid(numWndVals) / 1000.0 * radToDeg;
+                        if (midWndDir != INT16_MIN) {
+                            wndCenter = int((midWndDir + (midWndDir >= 0 ? 5 : -5)) / 10) * 10; // Set new center value; round to nearest 10 degree value
+                        }
+                    }
+                    LOG_DEBUG(GwLog::DEBUG, "PageWindPlot FreeTop: cHeight: %d, bufStart: %d, numWndVals: %d, wndCenter: %d", cHeight, bufStart, numWndVals, wndCenter);
+                    break;
+                }
+            }
+
+        } else {
+            // No valid data available
+            LOG_DEBUG(GwLog::LOG, "PageWindPlot: No valid data available");
+            getdisplay().setFont(&Ubuntu_Bold10pt8b);
+            getdisplay().fillRect(xCenter - 33, height / 2 - 20, 66, 24, commonData->bgcolor); // Clear area for message
+            drawTextCenter(xCenter, height / 2 - 10, "No data");
+        }
+
+        // Print TWS value
+        if (showTWS) {
+            int currentZone;
+            static int lastZone = 0;
+            static bool flipTws = false;
+            int xPosTws;
+            static const int yPosTws = yOffset + 40;
+
+            twsValue = pageData.boatHstry.twsHstry->getLast() / 10.0 * 1.94384; // TWS value in knots
+
+            xPosTws = flipTws ? 20 : width - 138;
+            currentZone = (y >= yPosTws - 38) && (y <= yPosTws + 6) && (x >= xPosTws - 4) && (x <= xPosTws + 146) ? 1 : 0; // Define current zone for TWS value
+            if (currentZone != lastZone) {
+                // Only flip when x moves to a different zone
+                if ((y >= yPosTws - 38) && (y <= yPosTws + 6) && (x >= xPosTws - 4) && (x <= xPosTws + 146)) {
+                    flipTws = !flipTws;
+                    xPosTws = flipTws ? 20 : width - 145;
+                }
+            }
+            lastZone = currentZone;
+
+            getdisplay().fillRect(xPosTws - 4, yPosTws - 38, 142, 44, commonData->bgcolor); // Clear area for TWS value
+            getdisplay().setFont(&DSEG7Classic_BoldItalic16pt7b);
+            getdisplay().setCursor(xPosTws, yPosTws);
+            if (!BDataValid[1]) {
+                getdisplay().print("--.-");
+            } else {
+                double dbl = BDataValue[1] * 3.6 / 1.852;
+                if (dbl < 10.0) {
+                    getdisplay().printf("!%3.1f", dbl); // Value, round to 1 decimal
+                } else {
+                    getdisplay().printf("%4.1f", dbl); // Value, round to 1 decimal
+                }
+            }
+            getdisplay().setFont(&Ubuntu_Bold12pt8b);
+            getdisplay().setCursor(xPosTws + 82, yPosTws - 14);
+//            getdisplay().print("TWS"); // Name
+            getdisplay().print(BDataName[1]); // Name
+            getdisplay().setFont(&Ubuntu_Bold8pt8b);
+//            getdisplay().setCursor(xPosTws + 78, yPosTws + 1);
+            getdisplay().setCursor(xPosTws + 82, yPosTws + 1);
+//            getdisplay().printf(" kn"); // Unit
+            getdisplay().print(BDataUnit[1]); // Unit
+        }
+
+        // chart Y axis labels; print at last to overwrite potential chart lines in label area
+        int yPos;
+        int chrtLbl;
+        getdisplay().setFont(&Ubuntu_Bold8pt8b);
+        for (int i = 1; i <= 3; i++) {
+            yPos = yOffset + (i * 60);
+            getdisplay().fillRect(0, yPos, width, 1, commonData->fgcolor);
+            getdisplay().fillRect(0, yPos - 8, 24, 16, commonData->bgcolor); // Clear small area to remove potential chart lines
+            getdisplay().setCursor(1, yPos + 4);
+            if (count >= intvBufSize) {
+                // Calculate minute value for label
+                chrtLbl = ((i - 1 + (prevY < yOffset + 30)) * dataIntv) * -1; // change label if last data point is more than 30 lines (= seconds) from chart line
+            } else {
+                int j = 3 - i;
+                chrtLbl = (int((((numWndVals / dataIntv) - 50) * dataIntv / 60) + 1) - (j * dataIntv)) * -1; // 50 lines left below last chart line
+            }
+            getdisplay().printf("%3d", chrtLbl); // Wind value label
+        }
+
+        return PAGE_UPDATE;
+    };
+};
+
+static Page* createPage(CommonData& common)
+{
+    return new PageWindPlot(common);
+}
+/**
+ * with the code below we make this page known to the PageTask
+ * we give it a type (name) that can be selected in the config
+ * we define which function is to be called
+ * and we provide the number of user parameters we expect (0 here)
+ * and will will provide the names of the fixed values we need
+ */
+PageDescription registerPageWindPlot(
+    "WindPlot", // Page name
+    createPage, // Action
+    0, // Number of bus values depends on selection in Web configuration
+    { "TWD", "TWS" }, // Bus values we need in the page
+//    {}, // Bus values we need in the page
+    true // Show display header on/off
+);
+
+#endif

lib/obp60task/Pagedata.h

@@ -4,15 +4,19 @@
 #include <functional>
 #include <vector>
 #include "LedSpiTask.h"
+#include "OBPRingBuffer.h"
+#include "OBPDataOperations.h"
 
 #define MAX_PAGE_NUMBER 10    // Max number of pages for show data
 
 typedef std::vector<GwApi::BoatValue *> ValueList;
+
 typedef struct{
   String pageName;
   uint8_t pageNumber; // page number in sequence of visible pages
   //the values will always contain the user defined values first
   ValueList values;
+  tBoatHstryData boatHstry;
 } PageData;
 
 // Sensor data structure (only for extended sensors, not for NMEA bus sensors)

lib/obp60task/config.json

@@ -75,6 +75,20 @@
             "obp60":"true"
         }
     },
+    {
+        "name": "chainLength",
+        "label": "Anchor Chain Length [m]",
+        "type": "number",
+        "default": 0,
+        "check": "checkMinMax",
+        "min": 0,
+        "max": 255,
+        "description": "The length of the anchor chain [0...255m]",
+        "category": "OBP60 Settings",
+        "capabilities": {
+            "obp60":"true"
+        }
+    },
     {
         "name": "fuelTank",
         "label": "Fuel Tank [l]",
@@ -219,6 +233,17 @@
             "obp60":"true"
         }
     },
+    {
+        "name": "calcTrueWnds",
+        "label": "Calculate True Wind",
+        "type": "boolean",
+        "default": "false",
+        "description": "If not available, calculate true wind data from appearant wind and other boat data",
+        "category": "OBP60 Settings",
+        "capabilities": {
+            "obp60": "true"
+        }
+    },
     {
         "name": "lengthFormat",
         "label": "Length Format",
@@ -1292,6 +1317,7 @@
         "default": "Voltage",
         "description": "Type of page for page 1",
         "list": [
+            "Anchor",
             "BME280",
             "Battery",
             "Battery2",
@@ -1313,6 +1339,7 @@
             "Voltage",
             "WhitePage",
             "Wind",
+            "WindPlot",
             "WindRose",
             "WindRoseFlex",
             "XTETrack"
@@ -1572,6 +1599,7 @@
         "default": "WindRose",
         "description": "Type of page for page 2",
         "list": [
+            "Anchor",
             "BME280",
             "Battery",
             "Battery2",
@@ -1593,6 +1621,7 @@
             "Voltage",
             "WhitePage",
             "Wind",
+            "WindPlot",
             "WindRose",
             "WindRoseFlex",
             "XTETrack"
@@ -1849,6 +1878,7 @@
         "default": "OneValue",
         "description": "Type of page for page 3",
         "list": [
+            "Anchor",
             "BME280",
             "Battery",
             "Battery2",
@@ -1870,6 +1900,7 @@
             "Voltage",
             "WhitePage",
             "Wind",
+            "WindPlot",
             "WindRose",
             "WindRoseFlex",
             "XTETrack"
@@ -2123,6 +2154,7 @@
         "default": "TwoValues",
         "description": "Type of page for page 4",
         "list": [
+            "Anchor",
             "BME280",
             "Battery",
             "Battery2",
@@ -2144,6 +2176,7 @@
             "Voltage",
             "WhitePage",
             "Wind",
+            "WindPlot",
             "WindRose",
             "WindRoseFlex",
             "XTETrack"
@@ -2394,6 +2427,7 @@
         "default": "ThreeValues",
         "description": "Type of page for page 5",
         "list": [
+            "Anchor",
             "BME280",
             "Battery",
             "Battery2",
@@ -2415,6 +2449,7 @@
             "Voltage",
             "WhitePage",
             "Wind",
+            "WindPlot",
             "WindRose",
             "WindRoseFlex",
             "XTETrack"
@@ -2662,6 +2697,7 @@
         "default": "FourValues",
         "description": "Type of page for page 6",
         "list": [
+            "Anchor",
             "BME280",
             "Battery",
             "Battery2",
@@ -2683,6 +2719,7 @@
             "Voltage",
             "WhitePage",
             "Wind",
+            "WindPlot",
             "WindRose",
             "WindRoseFlex",
             "XTETrack"
@@ -2927,6 +2964,7 @@
         "default": "FourValues2",
         "description": "Type of page for page 7",
         "list": [
+            "Anchor",
             "BME280",
             "Battery",
             "Battery2",
@@ -2948,6 +2986,7 @@
             "Voltage",
             "WhitePage",
             "Wind",
+            "WindPlot",
             "WindRose",
             "WindRoseFlex",
             "XTETrack"
@@ -3189,6 +3228,7 @@
         "default": "Clock",
         "description": "Type of page for page 8",
         "list": [
+            "Anchor",
             "BME280",
             "Battery",
             "Battery2",
@@ -3210,6 +3250,7 @@
             "Voltage",
             "WhitePage",
             "Wind",
+            "WindPlot",
             "WindRose",
             "WindRoseFlex",
             "XTETrack"
@@ -3448,6 +3489,7 @@
         "default": "RollPitch",
         "description": "Type of page for page 9",
         "list": [
+            "Anchor",
             "BME280",
             "Battery",
             "Battery2",
@@ -3469,6 +3511,7 @@
             "Voltage",
             "WhitePage",
             "Wind",
+            "WindPlot",
             "WindRose",
             "WindRoseFlex",
             "XTETrack"
@@ -3704,6 +3747,7 @@
         "default": "Battery2",
         "description": "Type of page for page 10",
         "list": [
+            "Anchor",
             "BME280",
             "Battery",
             "Battery2",
@@ -3725,6 +3769,7 @@
             "Voltage",
             "WhitePage",
             "Wind",
+            "WindPlot",
             "WindRose",
             "WindRoseFlex",
             "XTETrack"

lib/obp60task/config_obp40.json

@@ -75,6 +75,20 @@
             "obp40": "true"
         }
     },
+    {
+        "name": "chainLength",
+        "label": "Anchor Chain Length [m]",
+        "type": "number",
+        "default": "0",
+        "check": "checkMinMax",
+        "min": 0,
+        "max": 255,
+        "description": "The length of the anchor chain [0...255m]",
+        "category": "OBP40 Settings",
+        "capabilities": {
+            "obp40":"true"
+        }
+    },
     {
         "name": "fuelTank",
         "label": "Fuel Tank [l]",
@@ -219,6 +233,17 @@
             "obp40": "true"
         }
     },
+    {
+        "name": "calcTrueWnds",
+        "label": "Calculate True Wind",
+        "type": "boolean",
+        "default": "false",
+        "description": "If not available, calculate true wind data from appearant wind and other boat data",
+        "category": "OBP40 Settings",
+        "capabilities": {
+            "obp40": "true"
+        }
+    },
     {
         "name": "lengthFormat",
         "label": "Length Format",
@@ -1315,6 +1340,7 @@
         "default": "Clock",
         "description": "Type of page for page 1",
         "list": [
+            "Anchor",
             "BME280",
             "Battery",
             "Battery2",
@@ -1336,6 +1362,7 @@
             "Voltage",
             "WhitePage",
             "Wind",
+            "WindPlot",
             "WindRose",
             "WindRoseFlex",
             "XTETrack"
@@ -1595,6 +1622,7 @@
         "default": "Wind",
         "description": "Type of page for page 2",
         "list": [
+            "Anchor",
             "BME280",
             "Battery",
             "Battery2",
@@ -1616,6 +1644,7 @@
             "Voltage",
             "WhitePage",
             "Wind",
+            "WindPlot",
             "WindRose",
             "WindRoseFlex",
             "XTETrack"
@@ -1872,6 +1901,7 @@
         "default": "OneValue",
         "description": "Type of page for page 3",
         "list": [
+            "Anchor",
             "BME280",
             "Battery",
             "Battery2",
@@ -1893,6 +1923,7 @@
             "Voltage",
             "WhitePage",
             "Wind",
+            "WindPlot",
             "WindRose",
             "WindRoseFlex",
             "XTETrack"
@@ -2146,6 +2177,7 @@
         "default": "TwoValues",
         "description": "Type of page for page 4",
         "list": [
+            "Anchor",
             "BME280",
             "Battery",
             "Battery2",
@@ -2167,6 +2199,7 @@
             "Voltage",
             "WhitePage",
             "Wind",
+            "WindPlot",
             "WindRose",
             "WindRoseFlex",
             "XTETrack"
@@ -2417,6 +2450,7 @@
         "default": "ThreeValues",
         "description": "Type of page for page 5",
         "list": [
+            "Anchor",
             "BME280",
             "Battery",
             "Battery2",
@@ -2438,6 +2472,7 @@
             "Voltage",
             "WhitePage",
             "Wind",
+            "WindPlot",
             "WindRose",
             "WindRoseFlex",
             "XTETrack"
@@ -2685,6 +2720,7 @@
         "default": "FourValues",
         "description": "Type of page for page 6",
         "list": [
+            "Anchor",
             "BME280",
             "Battery",
             "Battery2",
@@ -2706,6 +2742,7 @@
             "Voltage",
             "WhitePage",
             "Wind",
+            "WindPlot",
             "WindRose",
             "WindRoseFlex",
             "XTETrack"
@@ -2950,6 +2987,7 @@
         "default": "FourValues2",
         "description": "Type of page for page 7",
         "list": [
+            "Anchor",
             "BME280",
             "Battery",
             "Battery2",
@@ -2971,6 +3009,7 @@
             "Voltage",
             "WhitePage",
             "Wind",
+            "WindPlot",
             "WindRose",
             "WindRoseFlex",
             "XTETrack"
@@ -3212,6 +3251,7 @@
         "default": "Fluid",
         "description": "Type of page for page 8",
         "list": [
+            "Anchor",
             "BME280",
             "Battery",
             "Battery2",
@@ -3233,6 +3273,7 @@
             "Voltage",
             "WhitePage",
             "Wind",
+            "WindPlot",
             "WindRose",
             "WindRoseFlex",
             "XTETrack"
@@ -3471,6 +3512,7 @@
         "default": "RollPitch",
         "description": "Type of page for page 9",
         "list": [
+            "Anchor",
             "BME280",
             "Battery",
             "Battery2",
@@ -3492,6 +3534,7 @@
             "Voltage",
             "WhitePage",
             "Wind",
+            "WindPlot",
             "WindRose",
             "WindRoseFlex",
             "XTETrack"
@@ -3727,6 +3770,7 @@
         "default": "Battery2",
         "description": "Type of page for page 10",
         "list": [
+            "Anchor",
             "BME280",
             "Battery",
             "Battery2",
@@ -3748,6 +3792,7 @@
             "Voltage",
             "WhitePage",
             "Wind",
+            "WindPlot",
             "WindRose",
             "WindRoseFlex",
             "XTETrack"

lib/obp60task/gen_set.py

@@ -31,8 +31,10 @@ no_of_fields_per_page = {
     "TwoValues": 2,
     "Voltage": 0,
     "WhitePage": 0,
+    "WindPlot": 0,
     "WindRose": 0,
     "WindRoseFlex": 6,
+    "Anchor", 0
 }
 
 # No changes needed beyond this point

lib/obp60task/images/OBP40_400x300.xbm

@@ -1,6 +1,6 @@
 #define OBP40_400x300_width 400
 #define OBP40_400x300_height 300
-static unsigned char OBP40_400x300_bits[] PROGMEM = {
+const unsigned char OBP40_400x300_bits[15000] PROGMEM = {
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

lib/obp60task/images/OBP60_400x300.xbm

@@ -1,6 +1,6 @@
 #define OBP60_400x300_width 400
 #define OBP60_400x300_height 300
-static unsigned char OBP60_400x300_bits[] = {
+const unsigned char OBP60_400x300_bits[15000] PROGMEM = {
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

lib/obp60task/images/OBP_400x300.xbm

@@ -1,6 +1,6 @@
 #define OBP_400x300_width 400
 #define OBP_400x300_height 300
-static unsigned char OBP_400x300_bits[] = {
+const unsigned char OBP_400x300_bits[15000] PROGMEM = {
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

lib/obp60task/obp60task.cpp

@@ -13,9 +13,11 @@
 #include "OBP60Extensions.h"            // Functions lib for extension board
 #include "OBP60Keypad.h"                // Functions for keypad
 #include "BoatDataCalibration.h"        // Functions lib for data instance calibration
+#include "OBPRingBuffer.h"              // Functions lib with ring buffer for history storage of some boat data
+#include "OBPDataOperations.h"          // Functions lib for data operations such as true wind calculation
 
 #ifdef BOARD_OBP40S3
-#include "driver/rtc_io.h"              // Needs for weakup from deep sleep
+#include "driver/rtc_io.h"              // Needs for wakeup from deep sleep
 #include <FS.h>                         // SD-Card access
 #include <SD.h>
 #include <SPI.h>
@@ -275,6 +277,8 @@ void registerAllPages(PageList &list){
     list.add(&registerPageFourValues2);
     extern PageDescription registerPageWind;
     list.add(&registerPageWind);
+    extern PageDescription registerPageWindPlot;
+    list.add(&registerPageWindPlot); 
     extern PageDescription registerPageWindRose;
     list.add(&registerPageWindRose);
     extern PageDescription registerPageWindRoseFlex;
@@ -309,6 +313,8 @@ void registerAllPages(PageList &list){
     list.add(&registerPageXTETrack);
     extern PageDescription registerPageFluid;
     list.add(&registerPageFluid);
+    extern PageDescription registerPageAnchor;
+    list.add(&registerPageAnchor);
 }
 
 // Undervoltage detection for shutdown display
@@ -372,6 +378,125 @@ void underVoltageDetection(GwApi *api, CommonData &common){
     }
 }
 
+//bool addTrueWind(GwApi* api, BoatValueList* boatValues, double *twd, double *tws, double *twa) {
+bool addTrueWind(GwApi* api, BoatValueList* boatValues) {
+    // Calculate true wind data and add to obp60task boat data list
+
+    double awaVal, awsVal, cogVal, stwVal, sogVal, hdtVal, hdmVal, varVal;
+    double twd, tws, twa;
+    bool isCalculated = false;
+    const double DBL_MIN = std::numeric_limits<double>::lowest();
+
+    GwApi::BoatValue *twdBVal = boatValues->findValueOrCreate("TWD");
+    GwApi::BoatValue *twsBVal = boatValues->findValueOrCreate("TWS");
+    GwApi::BoatValue *twaBVal = boatValues->findValueOrCreate("TWA");
+    GwApi::BoatValue *awaBVal = boatValues->findValueOrCreate("AWA");
+    GwApi::BoatValue *awsBVal = boatValues->findValueOrCreate("AWS");
+    GwApi::BoatValue *cogBVal = boatValues->findValueOrCreate("COG");
+    GwApi::BoatValue *stwBVal = boatValues->findValueOrCreate("STW");
+    GwApi::BoatValue *sogBVal = boatValues->findValueOrCreate("SOG");
+    GwApi::BoatValue *hdtBVal = boatValues->findValueOrCreate("HDT");
+    GwApi::BoatValue *hdmBVal = boatValues->findValueOrCreate("HDM");
+    GwApi::BoatValue *varBVal = boatValues->findValueOrCreate("VAR");
+    awaVal = awaBVal->valid ? awaBVal->value : DBL_MIN;
+    awsVal = awsBVal->valid ? awsBVal->value : DBL_MIN;
+    cogVal = cogBVal->valid ? cogBVal->value : DBL_MIN;
+    stwVal = stwBVal->valid ? stwBVal->value : DBL_MIN;
+    sogVal = sogBVal->valid ? sogBVal->value : DBL_MIN;
+    hdtVal = hdtBVal->valid ? hdtBVal->value : DBL_MIN;
+    hdmVal = hdmBVal->valid ? hdmBVal->value : DBL_MIN;
+    varVal = varBVal->valid ? varBVal->value : DBL_MIN;
+    api->getLogger()->logDebug(GwLog::DEBUG,"obp60task addTrueWind: AWA: %.1f, AWS: %.1f, COG: %.1f, STW: %.1f, HDT: %.1f, HDM: %.1f, VAR: %.1f", awaBVal->value * RAD_TO_DEG, awsBVal->value * 3.6 / 1.852,
+            cogBVal->value * RAD_TO_DEG, stwBVal->value * 3.6 / 1.852, hdtBVal->value * RAD_TO_DEG, hdmBVal->value * RAD_TO_DEG, varBVal->value * RAD_TO_DEG);
+
+//    isCalculated = WindUtils::calcTrueWind(&awaVal, &awsVal, &cogVal, &stwVal, &sogVal, &hdtVal, &hdmVal, &varVal, &twdBVal->value, &twsBVal->value, &twaBVal->value);
+    isCalculated = WindUtils::calcTrueWind(&awaVal, &awsVal, &cogVal, &stwVal, &sogVal, &hdtVal, &hdmVal, &varVal, &twd, &tws, &twa);
+
+    if (isCalculated) { // Replace values only, if successfully calculated and not already available
+        if (!twdBVal->valid) {
+            twdBVal->value = twd;
+            twdBVal->valid = true;
+        }
+        if (!twsBVal->valid) {
+            twsBVal->value = tws;
+            twsBVal->valid = true;
+        }
+        if (!twaBVal->valid) {
+            twaBVal->value = twa;
+            twaBVal->valid = true;
+        }
+    }
+    api->getLogger()->logDebug(GwLog::DEBUG,"obp60task calcTrueWind: TWD_Valid? %d, TWD=%.1f, TWS=%.1f, TWA=%.1f, isCalculated? %d", twdBVal->valid, twdBVal->value * RAD_TO_DEG, twsBVal->value * 3.6 / 1.852,
+        twaBVal->value * RAD_TO_DEG, isCalculated);
+
+    return isCalculated;
+}
+
+void initHstryBuf(GwApi* api, BoatValueList* boatValues, tBoatHstryData hstryBufList) {
+    // Init history buffers for TWD, TWS
+
+    GwApi::BoatValue *calBVal; // temp variable just for data calibration -> we don't want to calibrate the original data here
+
+    int hstryUpdFreq = 1000; // Update frequency for history buffers in ms
+    int hstryMinVal = 0; // Minimum value for these history buffers
+    int twdHstryMax = 6283; // Max value for wind direction (TWD) in rad (0...2*PI), shifted by 1000 for 3 decimals
+    int twsHstryMax = 1000; // Max value for wind speed (TWS) in m/s, shifted by 10 for 1 decimal
+    // Initialize history buffers with meta data
+    hstryBufList.twdHstry->setMetaData("TWD", "formatCourse", hstryUpdFreq, hstryMinVal, twdHstryMax);
+    hstryBufList.twsHstry->setMetaData("TWS", "formatKnots", hstryUpdFreq, hstryMinVal, twsHstryMax);
+
+    GwApi::BoatValue *twdBVal = boatValues->findValueOrCreate(hstryBufList.twdHstry->getName());
+    GwApi::BoatValue *twsBVal = boatValues->findValueOrCreate(hstryBufList.twsHstry->getName());
+    GwApi::BoatValue *twaBVal = boatValues->findValueOrCreate("TWA");
+}
+
+void handleHstryBuf(GwApi* api, BoatValueList* boatValues, tBoatHstryData hstryBufList) {
+    // Handle history buffers for TWD, TWS
+
+    GwLog *logger = api->getLogger();
+
+    int16_t twdHstryMin = hstryBufList.twdHstry->getMinVal();
+    int16_t twdHstryMax = hstryBufList.twdHstry->getMaxVal();
+    int16_t twsHstryMin = hstryBufList.twsHstry->getMinVal();
+    int16_t twsHstryMax = hstryBufList.twsHstry->getMaxVal();
+    int16_t twdBuf, twsBuf;
+    GwApi::BoatValue *calBVal; // temp variable just for data calibration -> we don't want to calibrate the original data here
+
+    GwApi::BoatValue *twdBVal = boatValues->findValueOrCreate(hstryBufList.twdHstry->getName());
+    GwApi::BoatValue *twsBVal = boatValues->findValueOrCreate(hstryBufList.twsHstry->getName());
+    GwApi::BoatValue *twaBVal = boatValues->findValueOrCreate("TWA");
+
+    api->getLogger()->logDebug(GwLog::DEBUG,"obp60task handleHstryBuf: twdBVal: %f, twsBVal: %f, twaBVal: %f, TWD_isValid? %d", twdBVal->value * RAD_TO_DEG,
+        twsBVal->value * 3.6 / 1.852, twaBVal->value * RAD_TO_DEG, twdBVal->valid);
+    calBVal = new GwApi::BoatValue("TWD"); // temporary solution for calibration of history buffer values
+    calBVal->setFormat(twdBVal->getFormat());
+    if (twdBVal->valid) {
+        calBVal->value = twdBVal->value;
+        calBVal->valid = twdBVal->valid;
+        calibrationData.calibrateInstance(calBVal, logger); // Check if boat data value is to be calibrated
+        twdBuf = static_cast<int16_t>(std::round(calBVal->value * 1000));
+        if (twdBuf >= twdHstryMin && twdBuf <= twdHstryMax) {
+            hstryBufList.twdHstry->add(twdBuf);
+        }
+    }
+    delete calBVal;
+    calBVal = nullptr;
+
+    calBVal = new GwApi::BoatValue("TWS"); // temporary solution for calibration of history buffer values
+    calBVal->setFormat(twsBVal->getFormat());
+    if (twsBVal->valid) {
+        calBVal->value = twsBVal->value;
+        calBVal->valid = twsBVal->valid;
+        calibrationData.calibrateInstance(calBVal, logger); // Check if boat data value is to be calibrated
+        twsBuf = static_cast<int16_t>(std::round(calBVal->value * 10));
+        if (twsBuf >= twsHstryMin && twsBuf <= twsHstryMax) {
+            hstryBufList.twsHstry->add(twsBuf);
+        }
+    }
+    delete calBVal;
+    calBVal = nullptr;
+}
+
 // OBP60 Task
 //####################################################################################
 void OBP60Task(GwApi *api){
@@ -485,6 +610,11 @@ void OBP60Task(GwApi *api){
     //commonData.distanceformat=config->getString(xxx);
     //add all necessary data to common data
 
+    // Create ring buffers for history storage of some boat data
+    RingBuffer<int16_t> twdHstry(960); // Circular buffer to store wind direction values; store 960 TWD values for 16 minutes history
+    RingBuffer<int16_t> twsHstry(960); // Circular buffer to store wind speed values (TWS)
+    tBoatHstryData hstryBufList = {&twdHstry, &twsHstry};
+
     //fill the page data from config
     numPages=config->getInt(config->visiblePages,1);
     if (numPages < 1) numPages=1;
@@ -523,6 +653,10 @@ void OBP60Task(GwApi *api){
             LOG_DEBUG(GwLog::DEBUG,"added fixed value %s to page %d",value->getName().c_str(),i);
             pages[i].parameters.values.push_back(value); 
        }
+        if (pages[i].description->pageName == "WindPlot") {
+            // Add boat history data to page parameters
+            pages[i].parameters.boatHstry = hstryBufList;
+        }
     }
     // add out of band system page (always available)
     Page *syspage = allPages.pages[0]->creator(commonData);
@@ -530,6 +664,13 @@ void OBP60Task(GwApi *api){
     // Read all calibration data settings from config
     calibrationData.readConfig(config, logger);
 
+    // Check user setting for true wind calculation
+    bool calcTrueWnds = api->getConfig()->getBool(api->getConfig()->calcTrueWnds, false);
+    // bool simulation = api->getConfig()->getBool(api->getConfig()->useSimuData, false);
+
+    // Initialize history buffer for certain boat data
+    initHstryBuf(api, &boatValues, hstryBufList);
+
     // Display screenshot handler for HTTP request
     // http://192.168.15.1/api/user/OBP60Task/screenshot
     api->registerRequestHandler("screenshot", [api, &pageNumber, pages](AsyncWebServerRequest *request) {
@@ -815,8 +956,8 @@ void OBP60Task(GwApi *api){
 //                    getdisplay().nextPage();                     // Partial update
 //                    getdisplay().nextPage();                     // Partial update
                 }
-            }
+            }        
-            
+                
             // Refresh display data, default all 1s
             currentPage = pages[pageNumber].page;
             int pagetime = 1000;
@@ -832,6 +973,12 @@ void OBP60Task(GwApi *api){
                 api->getBoatDataValues(boatValues.numValues,boatValues.allBoatValues);
                 api->getStatus(commonData.status);
 
+                if (calcTrueWnds) {
+                    addTrueWind(api, &boatValues);
+                }
+                // Handle history buffers for TWD, TWS for wind plot page and other usage
+                 handleHstryBuf(api, &boatValues, hstryBufList);
+
                 // Clear display
                 // getdisplay().fillRect(0, 0, getdisplay().width(), getdisplay().height(), commonData.bgcolor);
                 getdisplay().fillScreen(commonData.bgcolor);  // Clear display

lib/obp60task/platformio.ini

@@ -43,16 +43,17 @@ lib_deps =
     adafruit/Adafruit FRAM I2C@2.0.3
 build_flags=
     #https://thingpulse.com/usb-settings-for-logging-with-the-esp32-s3-in-platformio/?srsltid=AfmBOopGskbkr4GoeVkNlFaZXe_zXkLceKF6Rn-tmoXABCeAR2vWsdHL
-#    -D CORE_DEBUG_LEVEL=1           #Debug level for CPU core via CDC (seral device)
+#    -D CORE_DEBUG_LEVEL=1           #Debug level for CPU core via CDC (serial device)
 #    -D TIME=$UNIX_TIME              #Set PC time for RTC (only settable via VSC)
     -D DISABLE_DIAGNOSTIC_OUTPUT    #Disable diagnostic output for GxEPD2 lib
     -D BOARD_OBP60S3                #Board OBP60 V2.1 with ESP32S3
 #    -D HARDWARE_V20                 #OBP60 hardware revision V2.0
     -D HARDWARE_V21                 #OBP60 hardware revision V2.1
-#    -D DISPLAY_GDEW042T2            #old E-Ink display from Waveshare, R10 0.47 ohm
+#    -D DISPLAY_GDEW042T2            #old E-Ink display from GoodDisplay (Waveshare), R10 0.47 ohm - very good
-    -D DISPLAY_GDEY042T81           #new E-Ink display from Waveshare, R10 2.2 ohm
+    -D DISPLAY_GDEY042T81           #new E-Ink display from GoodDisplay (Waveshare), R10 2.2 ohm - good (contast lost by shunshine)
-#    -D DISPLAY_GYE042A87            #alternativ E-Ink display from Genyo Optical, R10 2.2 ohm
+#    -D DISPLAY_GYE042A87            #alternativ E-Ink display from Genyo Optical, R10 2.2 ohm - medium 
-#    -D DISPLAY_SE0420NQ04           #alternativ E-Ink display from SID Technology, R10 2.2 ohm
+#    -D DISPLAY_SE0420NQ04           #alternativ E-Ink display from SID Technology, R10 2.2 ohm - bad (burn in effects)
+#    -D DISPLAY_ZJY400300-042CAAMFGN #alternativ E-Ink display from ZZE Technology, R10 2.2 ohm - very good
     ${env.build_flags}
 #CONFIG_ESP_TASK_WDT_TIMEOUT_S = 10 #Task Watchdog timeout period (seconds) [1...60] 5 default
 upload_port = /dev/ttyACM0          #OBP60 download via USB-C direct
@@ -96,7 +97,8 @@ build_flags=
     -D DISABLE_DIAGNOSTIC_OUTPUT    #Disable diagnostic output for GxEPD2 lib
     -D BOARD_OBP40S3                #Board OBP40 with ESP32S3
     -D HARDWARE_V10                 #OBP40 hardware revision V1.0 SKU:DIE07300S V1.1 (CrowPanel 4.2)
-    -D DISPLAY_GDEY042T81           #new E-Ink display from Waveshare, R10 2.2 ohm
+    -D DISPLAY_GDEY042T81           #new E-Ink display from Good Display (Waveshare), R10 2.2 ohm - good (contast lost by shunshine)
+    #-D DISPLAY_ZJY400300-042CAAMFGN #alternativ E-Ink display from ZZE Technology, R10 2.2 ohm - very good   
     #-D LIPO_ACCU_1200               #Hardware extension, LiPo accu 3,7V 1200mAh
     #-D VOLTAGE_SENSOR               #Hardware extension, LiPo voltage sensor with two resistors
     ${env.build_flags}