This is an example of using Espruino JS to control a REYAX LoRa module.

LoraDemo.js

/*
This is an example of using Espruino JS to control a REYAX LoRa module.

It listens for "on" and "off" messages to change and LED and
sends "on" and "off" messages by pressing the button.

Watch the video here: https://youtu.be/IStuUv9eAmE
*/
const RYLR = require('https://github.com/wybiral/espruino-modules/blob/master/RYLR.js');

Serial1.setup(115200, {rx: B7, tx: B6});
const lora = RYLR.connect(Serial1);

lora.setNetwork(13).then(res => {
  return lora.setAddress(1);
}).then(res => {
  lora.on('data', evt => {
    digitalWrite(LED1, evt.data == 'on');
  });
});

setWatch(evt => {
  lora.send(evt.state ? 'on' : 'off', 2);
}, BTN, {repeat: true, edge: 'both'});