TTN UNO

#include <TheThingsNetwork.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>
#include <LowPower.h>

#define SEALEVELPRESSURE_HPA (1015)
#define loraSerial Serial1
#define debugSerial Serial
#define freqPlan TTN_FP_EU868
#define batPin A5

TheThingsNetwork ttn(loraSerial, debugSerial, freqPlan);
Adafruit_BME280 bme; // I2C

const char *appEui = "REMOVED";
const char *appKey = "REMOVED";

void setup()
{
  loraSerial.begin(57600);
  debugSerial.begin(9600);

  pinMode(batPin,INPUT);
  analogReference(INTERNAL);

  // Wait a maximum of 10s for Serial Monitor
  while (!debugSerial && millis() < 10000)
    ;

  debugSerial.println("-- STATUS");
  ttn.showStatus();

  debugSerial.println("-- JOIN");
  ttn.join(appEui, appKey);

  // Testing BME280 Sensor
  unsigned status;
  status = bme.begin(0x76);
  if (!status) {
    Serial.println("Could not find a valid BME280 sensor, check wiring, address, sensor ID!");
    Serial.print("SensorID was: 0x"); Serial.println(bme.sensorID(), 16);
    Serial.print("        ID of 0xFF probably means a bad address, a BMP 180 or BMP 085\n");
    Serial.print("   ID of 0x56-0x58 represents a BMP 280,\n");
    Serial.print("        ID of 0x60 represents a BME 280.\n");
    Serial.print("        ID of 0x61 represents a BME 680.\n");
    while (1) delay(10);
  }
}

void loop()
{
  ttn.wake();
  delay(100);
  debugSerial.println("-- LOOP");

  uint16_t humidity = bme.readHumidity() * 100;
  uint16_t temperature = bme.readTemperature() * 100;
  uint16_t pressure = bme.readPressure();
  uint16_t voltage = (analogRead(batPin) * 4.2/1023) * 100;

  byte payload[8];
  payload[0] = highByte(temperature);
  payload[1] = lowByte(temperature);
  payload[2] = highByte(humidity);
  payload[3] = lowByte(humidity);
  payload[4] = highByte(pressure);
  payload[5] = lowByte(pressure);
  payload[6] = highByte(voltage);
  payload[7] = lowByte(voltage);

  debugSerial.print("Temperature: ");
  debugSerial.println(temperature);
  debugSerial.print("Humidity: ");
  debugSerial.println(humidity);
  debugSerial.print("Pressure: ");
  debugSerial.println(pressure / 100.0F);
  debugSerial.print("Voltage");
  debugSerial.println(voltage);

  ttn.sendBytes(payload, sizeof(payload));

  ttn.sleep(2000000);    //sleep RN module in [ms]
  delay(100);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
  LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
}