Add MeshCore relay_radio firmware for Heltec T114

variants/keepteen_lt1/KeepteenLT1Board.h

@@ -0,0 +1,44 @@
+#pragma once
+
+#include <MeshCore.h>
+#include <Arduino.h>
+#include <helpers/NRF52Board.h>
+
+class KeepteenLT1Board : public NRF52Board {
+protected:
+  uint8_t btn_prev_state;
+
+public:
+  KeepteenLT1Board() : NRF52Board("KeepteenLT1_OTA") {}
+  void begin();
+
+  #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);
+  }
+
+  const char* getManufacturerName() const override {
+    return "Keepteen LT1";
+  }
+
+#if defined(P_LORA_TX_LED)
+  void onBeforeTransmit() override {
+    digitalWrite(P_LORA_TX_LED, HIGH);   // turn TX LED on
+  }
+  void onAfterTransmit() override {
+    digitalWrite(P_LORA_TX_LED, LOW);   // turn TX LED off
+  }
+#endif
+
+  void powerOff() override {
+    sd_power_system_off();
+  }
+};