1st step for M5 ENV3 iic module support

lib/iictask/GwIicTask.cpp

@@ -2,6 +2,33 @@
 #include "GwIicTask.h"
 #include "GwHardware.h"
 #include <Wire.h>
+#include <SHT3X.h>
+#include "GwTimer.h"
+#include "N2kMessages.h"
+#define GWSHT3X -1
+
+class SHT3XConfig{
+    public:
+    String tempTransducer;
+    String humidTransducer;
+    int iid;
+    bool tempActive;
+    bool humidActive;
+    long interval;
+    tN2kHumiditySource humiditySource;
+    tN2kTempSource tempSource;
+    SHT3XConfig(GwConfigHandler *config){
+        tempTransducer=config->getString(GwConfigDefinitions::SHT3XTempName);
+        humidTransducer=config->getString(GwConfigDefinitions::SHT3XHumidName);
+        iid=config->getInt(GwConfigDefinitions::SHT3Xiid,99);
+        tempActive=config->getBool(GwConfigDefinitions::iicSHT3XTemp);
+        humidActive=config->getBool(GwConfigDefinitions::iicSHT3XHumid);
+        interval=config->getInt(GwConfigDefinitions::SHT3Xinterval);
+        interval*=1000;
+        humiditySource=N2khs_InsideHumidity;
+        tempSource=N2kts_InsideTemperature;
+    }
+};
 void runIicTask(GwApi *api){
     GwLog *logger=api->getLogger();
     #ifndef _GWIIC
@@ -22,6 +49,50 @@ void runIicTask(GwApi *api){
         vTaskDelete(NULL);
         return;
     }
+    GwConfigHandler *config=api->getConfig();
+    SHT3X *sht3x=nullptr;
+    bool runLoop=false;
+    GwIntervalRunner timers;
+    #ifdef GWSHT3X
+        int8_t addr=GWSHT3X;
+        if (addr < 0) addr=0x44; //default
+        SHT3XConfig sht3xConfig(config);
+        if (sht3xConfig.humidActive || sht3xConfig.tempActive){
+            sht3x=new SHT3X();
+            sht3x->init(addr,&Wire);
+            LOG_DEBUG(GwLog::LOG,"initialized SHT3X at address %d",(int)addr);
+            runLoop=true;
+            timers.addAction(sht3xConfig.interval,[logger,api,sht3x,sht3xConfig](){
+                int rt=0;
+                if ((rt=sht3x->get())==0){
+                    double temp=sht3x->cTemp;
+                    temp=CToKelvin(temp);
+                    double humid=sht3x->humidity;
+                    LOG_DEBUG(GwLog::DEBUG,"SHT3X measure temp=%2.1f, humid=%2.0f",(float)temp,(float)humid);
+                    tN2kMsg msg;
+                    if (sht3xConfig.humidActive){
+                        SetN2kHumidity(msg,1,sht3xConfig.iid,sht3xConfig.humiditySource,humid);
+                        api->sendN2kMessage(msg);
+                    }
+                    if (sht3xConfig.tempActive){
+                        SetN2kTemperature(msg,1,sht3xConfig.iid,sht3xConfig.tempSource,temp);
+                        api->sendN2kMessage(msg);
+                    }
+                }
+                else{
+                    LOG_DEBUG(GwLog::DEBUG,"unable to query SHT3X: %d",rt);
+                }    
+            });
+        }
+    #endif
+    if (! runLoop){
+        LOG_DEBUG(GwLog::LOG,"nothing to do for IIC task, finish");
         vTaskDelete(NULL);
+        return;
+    }
+    while(true){
+        delay(100);
+        timers.loop();
+    }
 }
 //#endif

lib/iictask/SHT3X.cpp

@@ -0,0 +1,45 @@
+#include "SHT3X.h"
+
+bool SHT3X::init(uint8_t slave_addr_in, TwoWire* wire_in)
+{
+  _wire = wire_in;
+  _address=slave_addr_in;
+  return true;
+}
+
+byte SHT3X::get()
+{
+  unsigned int data[6];
+
+  // Start I2C Transmission
+  _wire->beginTransmission(_address);
+  // Send measurement command
+  _wire->write(0x2C);
+  _wire->write(0x06);
+  // Stop I2C transmission
+  if (_wire->endTransmission()!=0) 
+    return 1;  
+
+  delay(200);
+
+  // Request 6 bytes of data
+  _wire->requestFrom(_address, (uint8_t) 6);
+
+  // Read 6 bytes of data
+  // cTemp msb, cTemp lsb, cTemp crc, humidity msb, humidity lsb, humidity crc
+  for (int i=0;i<6;i++) {
+    data[i]=_wire->read();
+  };
+  
+  delay(50);
+  
+  if (_wire->available()!=0) 
+    return 2;
+
+  // Convert the data
+  cTemp = ((((data[0] * 256.0) + data[1]) * 175) / 65535.0) - 45;
+  fTemp = (cTemp * 1.8) + 32;
+  humidity = ((((data[3] * 256.0) + data[4]) * 100) / 65535.0);
+
+  return 0;
+}

lib/iictask/SHT3X.h

@@ -0,0 +1,26 @@
+#ifndef __SHT3X_H
+#define __HT3X_H
+
+
+#if ARDUINO >= 100
+ #include "Arduino.h"
+#else
+ #include "WProgram.h"
+#endif
+
+#include "Wire.h"
+
+class SHT3X{
+public:
+  bool init(uint8_t slave_addr_in=0x44, TwoWire* wire_in = &Wire);
+  byte get(void);
+  float cTemp=0;
+  float fTemp=0;
+  float humidity=0;
+
+private:
+  uint8_t _address;
+  TwoWire* _wire;
+};
+
+#endif

lib/iictask/config.json

@@ -0,0 +1,74 @@
+[
+    {
+        "name": "iicSHT3XTemp",
+        "label": "SHT3X Temperature",
+        "type": "boolen",
+        "default": true,
+        "description": "Enable the I2C SHT3x temp sensor",
+        "category": "sensors",
+        "capabilities": {
+            "SHT3X":"true"
+        }
+    },
+    {
+        "name": "iicSHT3XHumid",
+        "label": "SHT3X Humidity",
+        "type": "boolean",
+        "default": true,
+        "description": "Enable the I2C SHT3x humidity sensor",
+        "category": "sensors",
+        "capabilities": {
+            "SHT3X":"true"
+        }
+    },
+    {
+        "name": "SHT3XTempName",
+        "label": "SHT3X Temperature XDR",
+        "type": "String",
+        "default": "Temp",
+        "description": "set the XDR transducer name for the SHT3X Temperature, leave empty to disable ",
+        "category": "sensors",
+        "capabilities": {
+            "SHT3X":"true"
+        }
+    },
+    {
+        "name": "SHT3XHumidName",
+        "label": "SHT3X Humidity XDR",
+        "type": "String",
+        "default": "Humidity",
+        "description": "set the XDR transducer name for the SHT3X Humidity, leave empty to disable ",
+        "category": "sensors",
+        "capabilities": {
+            "SHT3X":"true"
+        }
+    },
+    {
+        "name": "SHT3Xiid",
+        "label": "SHT3X N2K instance id",
+        "type": "number",
+        "default": 99,
+        "description": "the N2K instance id the SHT3X Temperature and Humidity ",
+        "category": "sensors",
+        "min": 0,
+        "max": 255,
+        "check": "checkMinMax",
+        "capabilities": {
+            "SHT3X":"true"
+        }
+    },
+    {
+        "name": "SHT3Xinterval",
+        "label": "SHT3X Interval",
+        "type": "number",
+        "default": 2,
+        "description": "Interval(s) to query SHT3X Temperature and Humidity (1...300)",
+        "category": "sensors",
+        "min": 1,
+        "max": 300,
+        "check": "checkMinMax",
+        "capabilities": {
+            "SHT3X":"true"
+        }
+    }
+]

lib/iictask/platformio.ini

@@ -0,0 +1,12 @@
+[platformio]
+
+[env:testenv3]
+board = m5stack-atom
+lib_deps = 
+    ${env.lib_deps}
+build_flags=
+    -D M5_ENV3
+    -D M5_CAN_KIT
+    ${env.build_flags}
+upload_port = /dev/esp32
+upload_protocol = esptool