The Things Network (TTN) replacement example. Alternative for the no longer available LoRa LED/ON off basic sketch for Arduino MKR WAN 1310.

Lora_LED_ON_OFF.ino

/*
Lora_LED_ON_OFF: The Things Network testsketch that integrates with their payload formatters and tutorials

Altrnative for the no longer available LoRa LED/ON off basic sketch:
Please refer to https://create.arduino.cc/editor/FT-CONTENT/043f42fb-2b04-4cfb-a277-b1a3dd5366c2/preview

Jan Cumps 15-03-2024

With code from:
  Lora Send And Receive
  This sketch demonstrates how to send and receive data with the MKR WAN 1300/1310 LoRa module.
  This example code is in the public domain.
*/

#include <MKRWAN.h>

LoRaModem modem;

// Uncomment if using the Murata chip as a module
// LoRaModem modem(Serial1);

#include "arduino_secrets.h"
// Please enter your sensitive data in the Secret tab or arduino_secrets.h
String appEui = SECRET_APP_EUI;
String appKey = SECRET_APP_KEY;

void setup() {
  // put your setup code here, to run once:
  pinMode(LED_BUILTIN, OUTPUT);
  digitalWrite(LED_BUILTIN, 0);

  Serial.begin(115200);
  while (!Serial);
  // change this to your regional band (eg. US915, AS923, ...)
  if (!modem.begin(EU868)) {
    Serial.println("Failed to start module");
    while (1) {}
  };
  Serial.print("Your module version is: ");
  Serial.println(modem.version());
  Serial.print("Your device EUI is: ");
  Serial.println(modem.deviceEUI());

  int connected = modem.joinOTAA(appEui, appKey);
  if (!connected) {
    Serial.println("Something went wrong; are you indoor? Move near a window and retry");
    while (1) {}
  }

  // Set poll interval to 60 secs.
  modem.minPollInterval(60);
  // NOTE: independent of this setting, the modem will
  // not allow sending more than one message every 2 minutes,
  // this is enforced by firmware and can not be changed.
}

// #define WAITBEFOREAUTOSEND (6 * 60 * 2) // every 2 hours
#define WAITBEFOREAUTOSEND (6 * 10 * 2) // every 20 minutes

void loop() {

  static int previousLedState = 0;

  // enfore a communication every so many minutes, to check for downlinks
  static int loopcounter = 0;
  if (loopcounter % (WAITBEFOREAUTOSEND) == 0) {
    loopcounter = 0;
  }

  int err;
  char state;  

  if ((digitalRead(LED_BUILTIN) != previousLedState) || (loopcounter == 0) ) {
    previousLedState = digitalRead(LED_BUILTIN);
    state = previousLedState ? 0x01 : 0x00;

    modem.beginPacket();
    modem.print(state);
    err = modem.endPacket(true);
    if (err > 0) {
      Serial.println("Message sent correctly!");
    } else {
      Serial.println("Error sending message :(");
      Serial.println("(you may send a limited amount of messages per minute, depending on the signal strength");
      Serial.println("it may vary from 1 message every couple of seconds to 1 message every minute)");
    }
  }

  loopcounter ++; 
  delay(10000);

  if (!modem.available()) {
  //  Serial.println("No downlink message received at this time.");
    return;
  }

  char rcv[64];
  int i = 0;
  while (modem.available()) {
    rcv[i++] = (char)modem.read();
  }
  Serial.print("Received: ");
  switch (rcv[0]) {
  case 0x00:
    Serial.print("led off");
    digitalWrite(LED_BUILTIN, 0);
    break;
  case 0x01:
    Serial.print("led on");
    digitalWrite(LED_BUILTIN, 1);
    break;
  default:
    Serial.print("unexpected payload");
    Serial.print(rcv[0] + 32);
    break;
  }
  Serial.println();

}

The TTN LoRa LED/ON off basic sketch for Arduino MKR WAN 1310 is no longer available on create.arduino.cc .
You may find a pointer to that sketch in the payload formatter, when you create an Arduino SO thing on The Things Network (TTN).

This example can be used as a replacement. Read more on the element14 blog post Arduino MKR WAN 1310 on The Things Network (TTN).