Add MeshCore relay_radio firmware for Heltec T114

variants/nano_g2_ultra/nano-g2.h

@@ -0,0 +1,57 @@
+#pragma once
+
+#include "variant.h"
+
+#include <Arduino.h>
+#include <MeshCore.h>
+#include <helpers/NRF52Board.h>
+
+// LoRa radio module pins
+#define P_LORA_DIO_1             (32 + 10)
+#define P_LORA_NSS               (32 + 13)
+#define P_LORA_RESET             (32 + 15)
+#define P_LORA_BUSY              (32 + 11)
+#define P_LORA_SCLK              (0 + 12)
+#define P_LORA_MISO              (32 + 9)
+#define P_LORA_MOSI              (0 + 11)
+
+#define SX126X_DIO2_AS_RF_SWITCH true
+#define SX126X_DIO3_TCXO_VOLTAGE 1.8
+#define SX126X_POWER_EN          37
+
+// buttons
+#define PIN_BUTTON1              (32 + 6)
+#define BUTTON_PIN               PIN_BUTTON1
+#define PIN_USER_BTN             BUTTON_PIN
+
+// GPS
+#define GPS_EN                   PIN_GPS_STANDBY
+// built-ins
+#define VBAT_MV_PER_LSB          (0.73242188F) // 3.0V ADC range and 12-bit ADC resolution = 3000mV/4096
+
+#define VBAT_DIVIDER             (0.5F) // 150K + 150K voltage divider on VBAT, actually 100K + 100K
+#define VBAT_DIVIDER_COMP        (2.0F) // Compensation factor for the VBAT divider
+
+#define PIN_VBAT_READ            (0 + 2)
+#define REAL_VBAT_MV_PER_LSB     (VBAT_DIVIDER_COMP * VBAT_MV_PER_LSB)
+
+class NanoG2Ultra : public NRF52Board {
+public:
+  NanoG2Ultra() : NRF52Board("NANO_G2_OTA") {}
+  void begin();
+  uint16_t getBattMilliVolts() override;
+
+  const char *getManufacturerName() const override { return "Nano G2 Ultra"; }
+
+  void powerOff() override {
+    // put GPS chip to sleep
+    digitalWrite(PIN_GPS_STANDBY, LOW);
+    // TODO: unset buzzer to prevent notification circuit activating on hibernate
+    // needs to be set as silent or somehow stop using macros for pins
+
+    nrf_gpio_cfg_sense_input(digitalPinToInterrupt(PIN_USER_BTN), NRF_GPIO_PIN_NOPULL,
+                             NRF_GPIO_PIN_SENSE_LOW);
+
+    sd_power_system_off();
+  }
+};