Add bluetooth symbol when connected (alternate between APRS symbol and BT)

.clang-format

@@ -0,0 +1,66 @@
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src/LoRa_APRS_Tracker.cpp

@@ -48,6 +48,7 @@ bool      sendUpdate          = true;
 int       updateCounter       = Config.sendCommentAfterXBeacons;
 bool	    sendStandingUpdate  = false;
 bool      statusState         = true;
+bool      bluetoothConnected  = false;
 
 uint32_t  lastTx              = 0.0;
 uint32_t  txInterval          = 60000L;

src/bluetooth_utils.cpp

@@ -10,6 +10,7 @@ extern Configuration                 Config;
 extern BluetoothSerial  SerialBT;
 extern logging::Logger  logger;
 extern TinyGPSPlus      gps;
+extern bool             bluetoothConnected;
 
 namespace BLUETOOTH_Utils {
   String serialReceived;
@@ -47,9 +48,11 @@ namespace BLUETOOTH_Utils {
 
   void bluetoothCallback(esp_spp_cb_event_t event, esp_spp_cb_param_t *param) {
     if (event == ESP_SPP_SRV_OPEN_EVT) {
-      logger.log(logging::LoggerLevel::LOGGER_LEVEL_INFO, "Bluetooth", "Bluetooth client connected !");
+      logger.log(logging::LoggerLevel::LOGGER_LEVEL_INFO, "Bluetooth", "Client connected !");
+      bluetoothConnected = true;
     } else if (event == ESP_SPP_CLOSE_EVT) {
-      logger.log(logging::LoggerLevel::LOGGER_LEVEL_INFO, "Bluetooth", "Bluetooth client disconnected !");
+      logger.log(logging::LoggerLevel::LOGGER_LEVEL_INFO, "Bluetooth", "Client disconnected !");
+      bluetoothConnected = false;
     }
   }
 
@@ -77,8 +80,8 @@ namespace BLUETOOTH_Utils {
 
     shouldSendToLoRa = !serialReceived.isEmpty()
             // Test true APRS frame and not a NMEA (case when RX buffer overflow)
-            && serialReceived.indexOf(">") != -1
-            && serialReceived.indexOf(":") != -1
+            && serialReceived.indexOf('>') != -1
+            && serialReceived.indexOf(':') != -1
             && serialReceived.indexOf("$G") == -1
             && serialReceived.indexOf("$B") == -1;
 

src/custom_characters.h

@@ -3,6 +3,23 @@
 
 #include <Arduino.h>
 
+static const unsigned char bluetoothSymbol[] PROGMEM = {
+        0b00001100, 0b00000000,
+        0b00001111, 0b00000000,
+        0b00001100, 0b11000000,
+        0b11001100, 0b00110000,
+        0b00111100, 0b11000000,
+        0b00001111, 0b00000000,
+        0b00001111, 0b00000000,
+        0b00111100, 0b11000000,
+        0b11001100, 0b00110000,
+        0b00001100, 0b11000000,
+        0b00001111, 0b00000000,
+        0b00001100, 0b00000000,
+        0b00000000, 0b00000000,
+        0b00000000, 0b00000000
+};
+
 static const unsigned char runnerSymbol[] PROGMEM = {
     0b00000000, 0b11100000,
     0b00000000, 0b11100000,

src/display.cpp

@@ -15,11 +15,14 @@ extern Configuration    Config;
 extern Beacon           *currentBeacon;
 extern int              menuDisplay;
 extern bool             symbolAvailable;
+extern bool             bluetoothConnected;
 
 String symbolArray[10]         = {"[", ">", "j", "b", "<", "s", "u", "R", "v"};
 int   symbolArraySize         = sizeof(symbolArray)/sizeof(symbolArray[0]);
 const uint8_t *symbolsAPRS[]  = {runnerSymbol, carSymbol, jeepSymbol, bikeSymbol, motorcycleSymbol, shipSymbol, truckSymbol, recreationalVehicleSymbol, vanSymbol};
 
+uint32_t  symbolTime         = millis();
+
 // T-Beams bought with soldered OLED Screen comes with only 4 pins (VCC, GND, SDA, SCL)
 // If your board didn't come with 4 pins OLED Screen and comes with 5 and one of them is RST...
 // Uncomment Next Line (Remember ONLY if your OLED Screen has a RST pin). This is to avoid memory issues.
@@ -182,12 +185,26 @@ void show_display(String header, String line1, String line2, String line3, Strin
         break;
       }
     }
+
+    /*
+     * Symbol alternate every 2.5s (+/- 500ms due to 1s tick of display refresh)
+     * If bluetooth is disconnected or if we are in the first part of the clock, then we show the APRS symbol
+     * Otherwise, we are in the second part of the clock, then we show BT connected
+     */
+    if (!bluetoothConnected || millis() - symbolTime <= 2500) {
       if (symbol != 100) {
         symbolAvailable = true;
         display.drawBitmap((display.width() - SYM_WIDTH), 0, symbolsAPRS[symbol], SYM_WIDTH, SYM_HEIGHT, 1);
       } else {
         symbolAvailable = false;
       }
+    } else if (bluetoothConnected) {
+      display.drawBitmap((display.width() - SYM_WIDTH), 0, bluetoothSymbol, SYM_WIDTH, SYM_HEIGHT, 1);
+    }
+
+    if (millis() - symbolTime >= 5000) {
+      symbolTime = millis();
+    }
   }
   
   display.display();