* new helper: AutoDiscoverRTCClock, which detects: DS3231 (on i2c addr 0x68), or RV3028 (on i2c addr 0x52)

* repeater and room server: ver bump (v5), now use AutoDiscoverRTCClock
* various Board::begin() now should do Wire.begin(), with custom pin mappings if needed
* examples removed: ping client/server, and test_admin

src/helpers/nrf52/RAK4631Board.cpp

@@ -20,6 +20,23 @@ static void disconnect_callback(uint16_t conn_handle, uint8_t reason)
     MESH_DEBUG_PRINTLN("BLE client disconnected");
 }
 
+void RAK4631Board::begin() {
+  // for future use, sub-classes SHOULD call this from their begin()
+  startup_reason = BD_STARTUP_NORMAL;
+
+  pinMode(PIN_VBAT_READ, INPUT);
+
+#if defined(PIN_BOARD_SDA) && defined(PIN_BOARD_SCL)
+  Wire.begin(PIN_BOARD_SDA, PIN_BOARD_SCL);
+#else
+  Wire.begin();
+#endif
+
+  pinMode(SX126X_POWER_EN, OUTPUT);
+  digitalWrite(SX126X_POWER_EN, HIGH);
+  delay(10);   // give sx1262 some time to power up
+}
+
 bool RAK4631Board::startOTAUpdate() {
     // Config the peripheral connection with maximum bandwidth
     // more SRAM required by SoftDevice

src/helpers/nrf52/RAK4631Board.h

@@ -25,17 +25,7 @@ protected:
   uint8_t startup_reason;
 
 public:
-  void begin() {
-    // for future use, sub-classes SHOULD call this from their begin()
-    startup_reason = BD_STARTUP_NORMAL;
-
-    pinMode(PIN_VBAT_READ, INPUT);
-
-    pinMode(SX126X_POWER_EN, OUTPUT);
-    digitalWrite(SX126X_POWER_EN, HIGH);
-    delay(10);   // give sx1262 some time to power up
-  }
-
+  void begin();
   uint8_t getStartupReason() const override { return startup_reason; }
 
   #define BATTERY_SAMPLES 8

src/helpers/nrf52/T1000eBoard.cpp

@@ -4,7 +4,23 @@
 #include <bluefruit.h>
 #include <Wire.h>
 
+void T1000eBoard::begin() {
+  // for future use, sub-classes SHOULD call this from their begin()
+  startup_reason = BD_STARTUP_NORMAL;
 
+#if defined(PIN_BOARD_SDA) && defined(PIN_BOARD_SCL)
+  Wire.begin(PIN_BOARD_SDA, PIN_BOARD_SCL);
+#else
+  Wire.begin();
+#endif
+
+  //    pinMode(PIN_VBAT_READ, INPUT);
+
+  // Doesn't seem to be a pwr en pin ...
+  //    pinMode(LR1110_POWER_EN, OUTPUT);
+  //    digitalWrite(LR1110_POWER_EN, HIGH);
+    delay(10);   // give sx1262 some time to power up
+}
 
 #if 0
 static BLEDfu bledfu;

src/helpers/nrf52/T1000eBoard.h

@@ -25,17 +25,7 @@ protected:
   uint8_t startup_reason;
 
 public:
-  void begin() {
-    // for future use, sub-classes SHOULD call this from their begin()
-    startup_reason = BD_STARTUP_NORMAL;
-
-//    pinMode(PIN_VBAT_READ, INPUT);
-
-// Doesn't seem to be a pwr en pin ...
-//    pinMode(LR1110_POWER_EN, OUTPUT);
-//    digitalWrite(LR1110_POWER_EN, HIGH);
-    delay(10);   // give sx1262 some time to power up
-  }
+  void begin();
 
   uint16_t getBattMilliVolts() override {
     return 0;