Add support for Xiao ESP32C6 with external antenna configuration

Author: alexbegoon

src/helpers/esp32/XiaoC6Board.h

@@ -0,0 +1,28 @@
+#pragma once
+
+#include <Arduino.h>
+#include <helpers/ESP32Board.h>
+
+class XiaoC6Board : public ESP32Board {
+public:
+  void begin() {
+    ESP32Board::begin();
+
+#ifdef USE_XIAO_ESP32C6_EXTERNAL_ANTENNA
+// Connect an external antenna to your XIAO ESP32C6 otherwise, it may be damaged!
+    pinMode(3, OUTPUT);
+    digitalWrite(3, LOW); // Activate RF switch control
+
+    delay(100);
+
+    pinMode(14, OUTPUT);
+    digitalWrite(14, HIGH); // Use external antenna
+#endif
+  }
+
+  const char* getManufacturerName() const override {
+    return "Xiao C6";
+  }
+};
+
+

variants/xiao_c6/platformio.ini

@@ -87,6 +87,7 @@ build_flags =
   -D SX126X_DIO3_TCXO_VOLTAGE=1.8
   -D SX126X_CURRENT_LIMIT=140
   -D SX126X_RX_BOOSTED_GAIN=1
+  -D USE_XIAO_ESP32C6_EXTERNAL_ANTENNA=1
 
 [env:Meshimi_Repeater]
 extends = Meshimi

variants/xiao_c6/target.cpp

@@ -1,7 +1,7 @@
 #include <Arduino.h>
 #include "target.h"
 
-ESP32Board board;
+XiaoC6Board board;
 
 #if defined(P_LORA_SCLK)
   static SPIClass spi(0);

variants/xiao_c6/target.h

@@ -4,11 +4,12 @@
 #include <RadioLib.h>
 #include <helpers/radiolib/RadioLibWrappers.h>
 #include <helpers/ESP32Board.h>
+#include <helpers/esp32/XiaoC6Board.h>
 #include <helpers/radiolib/CustomSX1262Wrapper.h>
 #include <helpers/AutoDiscoverRTCClock.h>
 #include <helpers/SensorManager.h>
 
-extern ESP32Board board;
+extern XiaoC6Board board;
 extern WRAPPER_CLASS radio_driver;
 extern AutoDiscoverRTCClock rtc_clock;
 extern SensorManager sensors;