Milesight GS601: LoRaWAN Vape & Smoke Detector

function decodeUplink(input) {
  var bytes = input.bytes;
  var data = {};

  for (var i = 0; i < bytes.length; ) {
    var id = bytes[i++];

    if (id === 0x00) {                                  // battery (%)
      data.battery = bytes[i]; i += 1;
    } else if (id === 0x01) {                           // vaping index (0..100)
      data.vaping_index = bytes[i]; i += 1;
    } else if (id === 0x03) {                           // PM1.0 (ug/m3)
      data.pm1_0 = readUInt16LE(bytes, i); i += 2;
    } else if (id === 0x05) {                           // PM2.5 (ug/m3)
      data.pm2_5 = readUInt16LE(bytes, i); i += 2;
    } else if (id === 0x07) {                           // PM10 (ug/m3)
      data.pm10 = readUInt16LE(bytes, i); i += 2;
    } else if (id === 0x09) {                           // temperature (C)
      data.temperature = readInt16LE(bytes, i) / 10; i += 2;
    } else if (id === 0x0b) {                           // humidity (%RH)
      data.humidity = readUInt16LE(bytes, i) / 10; i += 2;
    } else if (id === 0x0d) {                           // TVOC
      data.tvoc = readUInt16LE(bytes, i); i += 2;
    } else if (id === 0x0f) {                           // tamper status (0/1)
      data.tamper = bytes[i]; i += 1;
    } else if (id === 0x12) {                           // occupancy (0/1)
      data.occupancy = bytes[i]; i += 1;
    } else {
      break;  // alarm frames, raw TVOC blocks and config replies are deployment-specific
    }
  }
  return { data: data };
}

function readUInt16LE(b, i) {
  return (b[i + 1] << 8) | b[i];
}
function readInt16LE(b, i) {
  var v = readUInt16LE(b, i);
  return v > 0x7fff ? v - 0x10000 : v;
}