⬆️MClimate CO2 Display lite Uplink decoder
Decoder (JavaScript ES5):
function decodeUplink(input) {
try{
var bytes = input.bytes;
var data = {};
const toBool = value => value == '1';
const calculateTemperature = (rawData) => (rawData - 400) / 10;
const calculateHumidity = (rawData) => (rawData * 100) / 256;
function handleKeepalive(bytes) {
let data = {};
// Temperature calculation from two bytes
let 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
let batteryVoltageRaw = (bytes[4] << 8) | bytes[5];
data.batteryVoltage = Number((batteryVoltageRaw / 1000).toFixed(2));
// CO2 calculation from bytes 6 and 7
let co2Low = bytes[6]; // Lower byte of CO2
let 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
let 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;
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 wdpC = commands[i + 1] == '00' ? false : parseInt(commands[i + 1], 16);
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');
}
}DataCake Decoder
function decodeUplink(input) {
try {
var bytes = input.bytes;
var data = {};
var toBool = function (value) { return value == '1'; };
var calculateTemperature = function (rawData) { return (rawData - 400) / 10; };
var calculateHumidity = function (rawData) { return (rawData * 100) / 256; };
var decbin = function (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;
var good_medium = parseInt(commands[i + 1] + commands[i + 2], 16);
var 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 wdpC = commands[i + 1] == '00' ? false : parseInt(commands[i + 1], 16);
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;
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;
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');
}
}
function Decoder(payload, port) {
var decoded = decodeUplink({ bytes: payload, fPort: port }).data;
// Extract Gateway Information
try {
decoded.LORA_RSSI = (!!normalizedPayload.gateways && !!normalizedPayload.gateways[0] && normalizedPayload.gateways[0].rssi) || 0;
decoded.LORA_SNR = (!!normalizedPayload.gateways && !!normalizedPayload.gateways[0] && normalizedPayload.gateways[0].snr) || 0;
decoded.LORA_DATARATE = normalizedPayload.data_rate;
} catch (e) {
console.log(JSON.stringify(e));
}
// Array where we store the fields that are being sent to Datacake
var datacakeFields = [];
// Take each field from decoded and convert them to Datacake format
for (var key in decoded) {
if (decoded.hasOwnProperty(key)) {
datacakeFields.push({ field: key.toUpperCase(), value: decoded[key] });
}
}
// Forward data to Datacake
return datacakeFields;
}Last updated