Here’s a very simple script that sets up the input data as an array of bytes, calls the Decode function, and prints the result, based on a ThingsNode. Hope that helps
// Decode decodes an array of bytes into an object.
// - fPort contains the LoRaWAN fPort number
// - bytes is an array of bytes, e.g. [225, 230, 255, 0]
// - variables contains the device variables e.g. {"calibration": "3.5"} (both the key / value are of type string)
// The function must return an object, e.g. {"temperature": 22.5}
function Decode(port, bytes, variables) {
var decoded = {};
var events = {
1: 'setup',
2: 'interval',
3: 'motion',
4: 'button'
};
decoded.event = events[port];
decoded.battery = (bytes[0] << 8) + bytes[1];
decoded.light = (bytes[2] << 8) + bytes[3];
if (bytes[4] & 0x80)
decoded.temperature = ((0xffff << 16) + (bytes[4] << 8) + bytes[5]) / 100;
else
decoded.temperature = ((bytes[4] << 8) + bytes[5]) / 100;
return decoded;
}
// define the input data
let data = Buffer.from([01, 02, 03, 04, 05, 06])
// call the decode function
let res = Decode(2, data, null)
// print the result
console.dir(res, {depth:null});