⬆️MClimate CO2 Display lite Uplink decoder
Universal Decoder:
Supports: The Thinks Network, Milesight, DataCake, Chirpstack
// DataCake
function Decoder(bytes, port){
var decoded = decodeUplink({ bytes: bytes, fPort: port }).data;
return decoded;
}
// Milesight
function Decode(port, bytes){
var decoded = decodeUplink({ bytes: bytes, fPort: port }).data;
return decoded;
}
// The Things Industries / Main
function decodeUplink(input) {
try{
var bytes = input.bytes;
var data = {};
function toBool(value){
return value == '1';
}
function calculateTemperature(rawData){
return (rawData - 400) / 10;
}
function calculateHumidity(rawData){
return (rawData * 100) / 256;
}
function handleKeepalive(bytes, data) {
// Temperature calculation from two bytes
var temperatureRaw = (bytes[1] << 8) | bytes[2]; // Shift byte[1] left by 8 bits and OR with byte[2]
data.sensorTemperature = Number(calculateTemperature(temperatureRaw).toFixed(2));
// Humidity calculation
data.relativeHumidity = Number(calculateHumidity(bytes[3]).toFixed(2));
// Battery voltage calculation from two bytes
var batteryVoltageRaw = (bytes[4] << 8) | bytes[5];
data.batteryVoltage = Number((batteryVoltageRaw / 1000).toFixed(2));
// CO2 calculation from bytes 6 and 7
var co2Low = bytes[6]; // Lower byte of CO2
var co2High = (bytes[7] & 0xF8) >> 3; // Mask the upper 5 bits and shift them right
data.CO2 = (co2High << 8) | co2Low; // Shift co2High left by 8 bits and combine with co2Low
// Power source status
data.powerSourceStatus = bytes[7] & 0x07; // Extract the last 3 bits directly
// Light intensity from two bytes
var lightIntensityRaw = (bytes[8] << 8) | bytes[9];
data.lux = lightIntensityRaw;
return data;
}
function handleResponse(bytes, data){
var commands = bytes.map(function(byte){
return ("0" + byte.toString(16)).substr(-2);
});
commands = commands.slice(0,-8);
var command_len = 0;
commands.map(function (command, i) {
switch (command) {
case '04':
{
command_len = 2;
var hardwareVersion = commands[i + 1];
var softwareVersion = commands[i + 2];
data.deviceVersions = { hardware: Number(hardwareVersion), software: Number(softwareVersion) };
}
break;
case '12':
{
command_len = 1;
data.keepAliveTime = parseInt(commands[i + 1], 16);
}
break;
case '14':
{
command_len = 1;
data.childLock = toBool(parseInt(commands[i + 1], 16)) ;
}
break;
case '19':
{
command_len = 1;
var commandResponse = parseInt(commands[i + 1], 16);
var periodInMinutes = commandResponse * 5 / 60;
data.joinRetryPeriod = periodInMinutes;
}
break;
case '1b':
{
command_len = 1;
data.uplinkType = parseInt(commands[i + 1], 16) ;
}
break;
case '1f':
{
command_len = 4;
var good_medium = (parseInt(commands[i + 1], 16) << 8) |
parseInt(commands[i + 2], 16);
var medium_bad = (parseInt(commands[i + 3], 16) << 8) |
parseInt(commands[i + 4], 16);
data.boundaryLevels = { good_medium: Number(good_medium), medium_bad: Number(medium_bad) } ;
}
break;
case '1d':
{
command_len = 2;
var deviceKeepAlive = 5;
var wdpC = commands[i + 1] == '00' ? false : commands[i + 1] * deviceKeepAlive + 7;
var wdpUc = commands[i + 2] == '00' ? false : parseInt(commands[i + 2], 16);
data.watchDogParams= { wdpC: wdpC, wdpUc: wdpUc } ;
}
break;
case '21':
{
command_len = 2;
data.autoZeroValue = (parseInt(commands[i + 1], 16) << 8) |
parseInt(commands[i + 2], 16);
}
break;
case '25':
{
command_len = 3;
var good_zone = parseInt(commands[i + 1], 16);
var medium_zone = parseInt(commands[i + 2], 16);
var bad_zone = parseInt(commands[i + 3], 16);
data.measurementPeriod = { good_zone: Number(good_zone), medium_zone: Number(medium_zone), bad_zone: Number(bad_zone) } ;
}
break;
case '2b':
{
command_len = 1;
data.autoZeroPeriod = parseInt(commands[i + 1], 16);
}
break;
case '34':
{
command_len = 1;
data.displayRefreshPeriod = parseInt(commands[i + 1], 16) ;
}
break;
case '41':
{
command_len = 1;
data.currentTemperatureVisibility = parseInt(commands[i + 1], 16) ;
}
break;
case '43':
{
command_len = 1;
data.humidityVisibility = parseInt(commands[i + 1], 16) ;
}
break;
case '45':
{
command_len = 1;
data.lightIntensityVisibility = parseInt(commands[i + 1], 16) ;
}
break;
case '80':
{
command_len = 1;
data.measurementBlindTime = parseInt(commands[i + 1], 16) ;
}
break;
case 'a0': {
command_len = 4;
var fuota_address = (parseInt(commands[i + 1], 16) << 24) |
(parseInt(commands[i + 2], 16) << 16) |
(parseInt(commands[i + 3], 16) << 8) |
parseInt(commands[i + 4], 16);
var fuota_address_raw = commands[i + 1] + commands[i + 2] +
commands[i + 3] + commands[i + 4];
data.fuota = { fuota_address: fuota_address, fuota_address_raw: fuota_address_raw };
break;
}
default:
break;
}
commands.splice(i,command_len);
});
return data;
}
if (bytes[0] == 1) {
data = handleKeepalive(bytes, data);
}else{
data = handleResponse(bytes,data);
bytes = bytes.slice(-10);
data = handleKeepalive(bytes, data);
}
return {data: data};
} catch (e) {
console.log(e)
throw new Error('Unhandled data');
}
}
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