Add LilyGO T-Beam 1W Support

variants/lilygo_tbeam_1w/TBeam1WBoard.cpp

@@ -0,0 +1,71 @@
+#include "TBeam1WBoard.h"
+
+void TBeam1WBoard::begin() {
+  ESP32Board::begin();
+
+  // Power on radio module (must be done before radio init)
+  pinMode(SX126X_POWER_EN, OUTPUT);
+  digitalWrite(SX126X_POWER_EN, HIGH);
+  radio_powered = true;
+  delay(10);  // Allow radio to power up
+
+  // RF switch RXEN pin handled by RadioLib via setRfSwitchPins()
+
+  // Initialize LED
+  pinMode(LED_PIN, OUTPUT);
+  digitalWrite(LED_PIN, LOW);
+
+  // Initialize fan control (on by default - 1W PA can overheat)
+  pinMode(FAN_CTRL_PIN, OUTPUT);
+  digitalWrite(FAN_CTRL_PIN, HIGH);
+}
+
+void TBeam1WBoard::onBeforeTransmit() {
+  // RF switching handled by RadioLib via SX126X_DIO2_AS_RF_SWITCH and setRfSwitchPins()
+  digitalWrite(LED_PIN, HIGH);  // TX LED on
+}
+
+void TBeam1WBoard::onAfterTransmit() {
+  digitalWrite(LED_PIN, LOW);   // TX LED off
+}
+
+uint16_t TBeam1WBoard::getBattMilliVolts() {
+  // T-Beam 1W uses 7.4V battery with voltage divider
+  // ADC reads through divider - adjust multiplier based on actual divider ratio
+  analogReadResolution(12);
+  uint32_t raw = 0;
+  for (int i = 0; i < 8; i++) {
+    raw += analogRead(BATTERY_PIN);
+  }
+  raw = raw / 8;
+  // Assuming voltage divider ratio from ADC_MULTIPLIER
+  // 3.3V reference, 12-bit ADC (4095 max)
+  return static_cast<uint16_t>((raw * 3300 * ADC_MULTIPLIER) / 4095);
+}
+
+const char* TBeam1WBoard::getManufacturerName() const {
+  return "LilyGo T-Beam 1W";
+}
+
+void TBeam1WBoard::powerOff() {
+  // Turn off radio LNA (CTRL pin must be LOW when not receiving)
+  digitalWrite(SX126X_RXEN, LOW);
+
+  // Turn off radio power
+  digitalWrite(SX126X_POWER_EN, LOW);
+  radio_powered = false;
+
+  // Turn off LED and fan
+  digitalWrite(LED_PIN, LOW);
+  digitalWrite(FAN_CTRL_PIN, LOW);
+
+  ESP32Board::powerOff();
+}
+
+void TBeam1WBoard::setFanEnabled(bool enabled) {
+  digitalWrite(FAN_CTRL_PIN, enabled ? HIGH : LOW);
+}
+
+bool TBeam1WBoard::isFanEnabled() const {
+  return digitalRead(FAN_CTRL_PIN) == HIGH;
+}