Added Pi PIcoW support in the following modes:

- Companion Radio over USB Serial
- Repeater
- Room Server
- Terminal Chat

src/helpers/rp2040/PicoWBoard.h

@@ -0,0 +1,64 @@
+#pragma once
+
+#include <MeshCore.h>
+#include <Arduino.h>
+
+// LoRa radio module pins for PicoW
+#define  P_LORA_DIO_1   20
+#define  P_LORA_NSS     3
+#define  P_LORA_RESET   15
+#define  P_LORA_BUSY    2
+#define  P_LORA_SCLK    10
+#define  P_LORA_MISO    12
+#define  P_LORA_MOSI    11
+//#define  SX126X_POWER_EN  ??? // Not Sure
+
+#define SX126X_DIO2_AS_RF_SWITCH  true
+#define SX126X_DIO3_TCXO_VOLTAGE   1.8
+
+// built-ins
+#define  PIN_VBAT_READ    26
+#define  ADC_MULTIPLIER   (3 * 1.73 * 1.187 * 1000) // MT Uses 3.1
+#define  PIN_LED_BUILTIN  LED_BUILTIN
+
+class PicoWBoard : public mesh::MainBoard {
+protected:
+  uint8_t startup_reason;
+
+public:
+  void begin();
+  uint8_t getStartupReason() const override { return startup_reason; }
+
+  void onBeforeTransmit() override {
+    digitalWrite(LED_BUILTIN, HIGH);   // turn TX LED on
+  }
+
+  void onAfterTransmit() override {
+    digitalWrite(LED_BUILTIN, LOW);   // turn TX LED off
+  }
+
+  #define BATTERY_SAMPLES 8
+
+  uint16_t getBattMilliVolts() override {
+    analogReadResolution(12);
+
+    uint32_t raw = 0;
+    for (int i = 0; i < BATTERY_SAMPLES; i++) {
+      raw += analogRead(PIN_VBAT_READ);
+    }
+    raw = raw / BATTERY_SAMPLES;
+
+    return (ADC_MULTIPLIER * raw) / 4096;
+  }
+
+  const char* getManufacturerName() const override {
+    return "Pico W";
+  }
+
+  void reboot() override {
+    //NVIC_SystemReset();
+    rp2040.reboot();
+  }
+
+  bool startOTAUpdate(const char* id, char reply[]) override;
+};