TTN Uno Example for sending temperature from TMP36

TTN_Uno_TMP36.ino

/*
 Circuit:
 * TMP36 middle pin attached to pin A0, left to VCC, right to GND

 created Feb 2023
 by Duncan Wilson
 */
#include <TheThingsNetwork.h>

// Set your AppEUI and AppKey
const char *appEui = "xxx";
const char *appKey = "xxx";

#define loraSerial Serial1
#define debugSerial Serial

// Replace REPLACE_ME with TTN_FP_EU868 or TTN_FP_US915
#define freqPlan TTN_FP_EU868
TheThingsNetwork ttn(loraSerial, debugSerial, freqPlan);

//TMP36 Pin Variables
int sensorPin = A0; //the analog pin the TMP36's Vout (sense)

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

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

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

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

}

void loop()
{
  debugSerial.println("-- LOOP");

  // Read sensor values and multiply by 100 to effictively have 2 decimals
  uint16_t temperature = analogRead(sensorPin) * 100;

  // Split both words (16 bits) into 2 bytes of 8
  byte payload[2];
  payload[0] = highByte(temperature);
  payload[1] = lowByte(temperature);

  debugSerial.print("Temperature: ");
  debugSerial.println(temperature);

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

  delay(60000); // wait a minute
}