R1 Neo: Disable blue LED to save power

variants/muziworks_r1_neo/R1NeoBoard.cpp

@@ -47,8 +47,8 @@ void R1NeoBoard::begin() {
   // button is active high and passed through from I/O controller
   pinMode(PIN_USER_BTN, INPUT);
 
-  pinMode(PIN_BUZZER, OUTPUT);
-  digitalWrite(PIN_BUZZER, LOW);
+  pinMode(3, OUTPUT);  // buzzer drive pin (P0.03) - pull low to avoid power draw, beeper is disabled
+  digitalWrite(3, LOW);
 
   // battery pins
   pinMode(PIN_BAT_CHG, INPUT);

variants/muziworks_r1_neo/R1NeoBoard.h

@@ -27,14 +27,14 @@ class R1NeoBoard : public NRF52BoardDCDC {
 #if defined(P_LORA_TX_LED)
   void onBeforeTransmit() override {
     digitalWrite(P_LORA_TX_LED, HIGH);   // turn TX LED on
-    #if defined(LED_BLUE)
+    #if defined(LED_BLUE) && LED_BLUE >= 0
        // turn off that annoying blue LED before transmitting
        digitalWrite(LED_BLUE, LOW);
     #endif
   }
   void onAfterTransmit() override {
     digitalWrite(P_LORA_TX_LED, LOW);   // turn TX LED off
-    #if defined(LED_BLUE)
+    #if defined(LED_BLUE) && LED_BLUE >= 0
        // do it after transmitting too, just in case
        digitalWrite(LED_BLUE, LOW);
     #endif

variants/muziworks_r1_neo/platformio.ini

@@ -13,7 +13,6 @@ build_flags = ${nrf52_base.build_flags}
   -D LORA_TX_POWER=22
   -D SX126X_CURRENT_LIMIT=140
   -D SX126X_RX_BOOSTED_GAIN=1
-  -D PIN_BUZZER=3
   -D PIN_USER_BTN=26
   -D USER_BTN_PRESSED=HIGH
   -D PIN_GPS_TX=25

variants/muziworks_r1_neo/variant.h

@@ -80,7 +80,7 @@ extern "C"
 
 /* LEDs */
 #define LED_GREEN   (36) // P1.04 (28) GRN_LED_RAK
-#define LED_BLUE    (28) // P0.28 (31) BLU_LED_RAK
+#define LED_BLUE    (-1) // Disable annoying flashing caused by Bluefruit
 
 #define LED_BUILTIN (0xFF)
 
@@ -94,7 +94,7 @@ extern "C"
 #define PIN_USER_BTN (26)
 
 /* Buzzer */
-#define PIN_BUZZER    (3)
+// #define PIN_BUZZER    (3) // Disabled: beeper is undesirable on this device
 
 /* Analog pins */
 // Arduino makes me angry