add heltec tower v2

variants/heltec_tower_v2/target.cpp

@@ -0,0 +1,31 @@
+#include "target.h"
+
+#include <Arduino.h>
+#include <helpers/ArduinoHelpers.h>
+#include <helpers/sensors/MicroNMEALocationProvider.h>
+
+HeltecTowerV2Board board;
+
+RADIO_CLASS radio = new Module(P_LORA_NSS, P_LORA_DIO_1, P_LORA_RESET, P_LORA_BUSY, SPI);
+
+WRAPPER_CLASS radio_driver(radio, board);
+
+VolatileRTCClock fallback_clock;
+AutoDiscoverRTCClock rtc_clock(fallback_clock);
+MicroNMEALocationProvider nmea = MicroNMEALocationProvider(Serial1, &rtc_clock);
+EnvironmentSensorManager sensors = EnvironmentSensorManager(nmea);
+
+#ifdef DISPLAY_CLASS
+DISPLAY_CLASS display;
+MomentaryButton user_btn(PIN_USER_BTN, 1000, true);
+#endif
+
+bool radio_init() {
+  rtc_clock.begin(Wire);
+  return radio.std_init(&SPI);
+}
+
+mesh::LocalIdentity radio_new_identity() {
+  RadioNoiseListener rng(radio);
+  return mesh::LocalIdentity(&rng);
+}