Add LED

variants/heltec_rc52/HeltecRC52Board.cpp

@@ -49,6 +49,9 @@ void HeltecRC52Board::begin()
 #ifdef NRF52_POWER_MANAGEMENT
   checkBootVoltage(&power_config);
 #endif
+  pinMode(P_LORA_TX_LED, OUTPUT);
+  digitalWrite(P_LORA_TX_LED, LOW); // off by default, active high
+
   periph_power.begin();
   periph_power.claim();
 }
@@ -59,6 +62,14 @@ void HeltecRC52Board::shutdownPeripherals()
   variant_shutdown();
 }
 
+void HeltecRC52Board::onBeforeTransmit() {
+  digitalWrite(P_LORA_TX_LED, HIGH);
+}
+
+void HeltecRC52Board::onAfterTransmit() {
+  digitalWrite(P_LORA_TX_LED, LOW);
+}
+
 uint16_t HeltecRC52Board::getBattMilliVolts()
 {
   analogReadResolution(12);

variants/heltec_rc52/HeltecRC52Board.h

@@ -17,6 +17,8 @@ public:
   HeltecRC52Board() : NRF52Board("RC52_OTA"), periph_power(SENSOR_POWER_CTRL_PIN, SENSOR_POWER_ON) {}
 
   void begin() override;
+  void onBeforeTransmit() override;
+  void onAfterTransmit() override;
   void shutdownPeripherals() override;
   uint16_t getBattMilliVolts() override;
   const char* getManufacturerName() const override;

variants/heltec_rc52/platformio.ini

@@ -20,6 +20,7 @@ build_flags = ${nrf52_base.build_flags}
   -D P_LORA_SCLK=25
   -D P_LORA_MISO=14
   -D P_LORA_MOSI=22
+  -D P_LORA_TX_LED=15
   -D LORA_TX_POWER=22
   -D SX126X_CURRENT_LIMIT=140
   -D SX126X_RX_BOOSTED_GAIN=1