⬆️MClimate CO2 Display Lite Uplink decoder
Decoder (JavaScript ES5):
function decodeUplink(input) {
try{
var bytes = input.bytes;
var data = {};
const toBool = value => value == '1';
var calculateTemperature = function (rawData){return (rawData - 400) / 10};
var calculateHumidity = function(rawData){return (rawData * 100) / 256};
let decbin = (number) => {
if (number < 0) {
number = 0xFFFFFFFF + number + 1
}
number = number.toString(2);
return "00000000".substr(number.length) + number;
}
function handleKeepalive(bytes, data){
var tempHex = '0' + bytes[1].toString(16) + bytes[2].toString(16);
var tempDec = parseInt(tempHex, 16);
var temperatureValue = calculateTemperature(tempDec);
var humidityValue = calculateHumidity(bytes[3]);
var batteryHex = '0' + bytes[4].toString(16) + bytes[5].toString(16);
var batteryVoltageCalculated = parseInt(batteryHex, 16)/1000;
var temperature = temperatureValue;
var humidity = humidityValue;
var batteryVoltage = batteryVoltageCalculated;
var ppmBin = decbin(bytes[6]);
var ppmBin2 = decbin(bytes[7]);
ppmBin = `${ppmBin2.slice(0,5)}${ppmBin}`
var ppm = parseInt(ppmBin, 2);
var powerSourceStatus = ppmBin2.slice(5,8);
var lux = parseInt('0' + bytes[8].toString(16) + bytes[9].toString(16), 16);
data.sensorTemperature = Number(temperature.toFixed(2));
data.relativeHumidity = Number(humidity.toFixed(2));
data.batteryVoltage = Number(batteryVoltage.toFixed(3));
data.CO2 = ppm;
data.powerSourceStatus = parseInt(powerSourceStatus,2);
data.lux = lux;
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;
let good_medium = parseInt(`${commands[i + 1]}${commands[i + 2]}`, 16);
let medium_bad = parseInt(`${commands[i + 3]}${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(`${commands[i + 1]}${commands[i + 2]}`, 16);
}
break;
case '25':
{
command_len = 3;
let good_zone = parseInt(commands[i + 1], 16);
let medium_zone = parseInt(commands[i + 2], 16);
let 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;
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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