From b54acbae4224e27a3a8c05227070dba59ca6041c Mon Sep 17 00:00:00 2001
From: norbert-walter <norbert-walter@web.de>
Date: Sat, 13 Dec 2025 21:08:39 +0100
Subject: [PATCH] Backup actual firmware

---
 lib/obp60task/OBP60Extensions.cpp |  4 +---
 lib/obp60task/OBP60Hardware.h     |  4 ++++
 lib/obp60task/PageNavigation.cpp  | 30 ++++++++++++++++++++++++++++--
 3 files changed, 33 insertions(+), 5 deletions(-)

diff --git a/lib/obp60task/OBP60Extensions.cpp b/lib/obp60task/OBP60Extensions.cpp
index b8119f0..b296602 100644
--- a/lib/obp60task/OBP60Extensions.cpp
+++ b/lib/obp60task/OBP60Extensions.cpp
@@ -27,9 +27,7 @@
 #include "fonts/IBM8x8px.h"
 
 // E-Ink Display
-#define GxEPD_WIDTH 400     // Display width
-#define GxEPD_HEIGHT 300    // Display height
-
+// Definition for e-paper width an height refer OBP60Hardware.h
 #ifdef DISPLAY_GDEW042T2
 // Set display type and SPI pins for display
 GxEPD2_BW<GxEPD2_420, GxEPD2_420::HEIGHT> display(GxEPD2_420(OBP_SPI_CS, OBP_SPI_DC, OBP_SPI_RST, OBP_SPI_BUSY)); // GDEW042T2 400x300, UC8176 (IL0398)
diff --git a/lib/obp60task/OBP60Hardware.h b/lib/obp60task/OBP60Hardware.h
index ac366c8..1787f83 100644
--- a/lib/obp60task/OBP60Hardware.h
+++ b/lib/obp60task/OBP60Hardware.h
@@ -42,6 +42,8 @@
     #define OBP_SPI_DIN 48
     #define SHOW_TIME 6000        // Show time in [ms] for logo and WiFi QR code
     #define FULL_REFRESH_TIME 600 // Refresh cycle time in [s][600...3600] for full display update (very important healcy function)
+    #define GxEPD_WIDTH 400       // Display width
+    #define GxEPD_HEIGHT 300      // Display height
 
     // GPS (NEO-6M, NEO-M8N, ATGM336H)
     #define OBP_GPS_RX 2
@@ -119,6 +121,8 @@
     #define OBP_SPI_DIN 11
     #define SHOW_TIME 6000        // Show time in [ms] for logo and WiFi QR code
     #define FULL_REFRESH_TIME 600 // Refresh cycle time in [s][600...3600] for full display update (very important healcy function)
+    #define GxEPD_WIDTH 400       // Display width
+    #define GxEPD_HEIGHT 300      // Display height
     // SPI SD-Card
     #define SD_SPI_CS GPIO_NUM_10
     #define SD_SPI_MOSI GPIO_NUM_40
diff --git a/lib/obp60task/PageNavigation.cpp b/lib/obp60task/PageNavigation.cpp
index d83cd17..be91519 100644
--- a/lib/obp60task/PageNavigation.cpp
+++ b/lib/obp60task/PageNavigation.cpp
@@ -19,6 +19,9 @@ bool firstRun = true;    // Detect the first page run
 int zoom = 15;           // Default zoom level
 bool showValues = false; // Show values HDT, SOG, DBT in navigation map
 
+// Init image backup for navigation map
+uint8_t* imageBackupData = (uint8_t*) heap_caps_malloc((GxEPD_WIDTH * GxEPD_HEIGHT), MALLOC_CAP_SPIRAM); // Allocate PSRAM for image backup buffer for navigation map(400 x 300 pix)
+
 public:
     PageNavigation(CommonData &common){
         commonData = &common;
@@ -119,6 +122,11 @@ public:
         static double magneticHeading = 0;
         static double speedOverGround = 0;
         static double depthBelowTransducer = 0;
+        int imgWidth = 0;
+        int imgHeight = 0;
+        int imgBackupWidth = 400;
+        int imgBackupHeight = 250;
+        bool hasImageBackup = false;
 
         // Get boat values #1 Latitude
         GwApi::BoatValue *bvalue1 = pageData.values[0]; // First element in list (only one value by PageOneValue)
@@ -360,8 +368,8 @@ public:
 
             auto& json = net.json();                // Extract JSON content
             int numPix = json["number_pixels"] | 0; // Read number of pixels
-            int imgWidth = json["width"] | 0;       // Read width of image
-            int imgHeight = json["height"] | 0;     // Read height og image
+            imgWidth = json["width"] | 0;           // Read width of image
+            imgHeight = json["height"] | 0;         // Read height og image
 
             const char* b64src = json["picture_base64"].as<const char*>();  // Read picture as Base64 content
             size_t b64len = strlen(b64src);                                 // Calculate length of Base64 content
@@ -387,13 +395,31 @@ public:
             size_t decodedSize = 0;
             decoder.decodeBase64(b64, imageData, imgSize, decodedSize);
 
+            // Copy actual navigation man to ackup map
+            memcpy(imageBackupData, imageData, imgSize);
+
             // Show image (navigation map)
             getdisplay().drawBitmap(0, 25, imageData, imgWidth, imgHeight, commonData->fgcolor);
+            hasImageBackup = true;
 
             // Clean PSRAM
             free(b64);
             free(imageData);
         }
+        // If no network connection then use backup navigation map
+        else{
+            // Show backup image (backup navigation map)
+            if (hasImageBackup) {
+                getdisplay().drawBitmap(0, 25, imageBackupData, imgBackupWidth, imgBackupHeight, commonData->fgcolor);
+            }    
+
+            // Show info: Connection lost
+            getdisplay().setFont(&Ubuntu_Bold12pt8b);
+            getdisplay().fillRect(200, 250 , 200, 25, commonData->fgcolor); // Black rect
+            getdisplay().fillRect(202, 252 , 196, 21, commonData->bgcolor); // White rect
+            getdisplay().setCursor(205, 270);
+            getdisplay().print("Connection lost");
+        }
 
 
         // ############### Draw Values ################