> For the complete documentation index, see [llms.txt](https://docs.mclimate.eu/mclimate-lorawan-devices/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mclimate.eu/mclimate-lorawan-devices/devices/mclimate-fan-coil-thermostat-fct/decoding-and-bacnet-object-mapping/mclimate-fan-coil-thermostat-uplink-decoder.md).

# MClimate Fan Coil Thermostat Uplink decoder

## Universal Decoder:

*Supports: The Thinks Network, Milesight, DataCake*

```
// 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 calculateTemperature(rawData) {
            return (rawData - 400) / 10;
        }
        
        function calculateHumidity(rawData) {
            return (rawData * 100) / 256;
        }
        function handleKeepalive(bytes, data) {
            var tempRaw = (bytes[1] << 8) | bytes[2];
            var temperatureValue = calculateTemperature(tempRaw);
            var humidityValue = calculateHumidity(bytes[3]);
            var targetTemperature = ((bytes[4] << 8) | bytes[5]) / 10;
            var operationalMode = bytes[6];
            var displayedFanSpeed = bytes[7];
            var actualFanSpeed = bytes[8];
            var valveStatus = bytes[9];
            var deviceStatus = bytes[10];

            data.sensorTemperature = Number(temperatureValue.toFixed(2));
            data.relativeHumidity = Number(humidityValue.toFixed(2));
            data.targetTemperature = targetTemperature;
            data.operationalMode = operationalMode;
            data.displayedFanSpeed = displayedFanSpeed;
            data.actualFanSpeed = actualFanSpeed;
            data.valveStatus = valveStatus;
            data.deviceStatus = deviceStatus;
            return data;
        }

        function handleResponse(bytes, data) {
            var commands = bytes.map(function (byte) {
                return ("0" + byte.toString(16)).substr(-2);
            });
            commands = commands.slice(0, -11);
            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 '05':
                        {
                            command_len = 1;
                            data.targetTemperatureStep = parseInt(commands[i + 1], 16) / 10
                        }
                        break;
                    case '12':
                        {
                            command_len = 1;
                            data.keepAliveTime = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '14':
                        {
                            // 0: none locked, 1: all, 2: on/off + mode, 3: on/off, 4: all except on/off, 5: mode
                            command_len = 1;
                            data.keysLock = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '15':
                        {
                            command_len = 2;
                            data.temperatureRangeSettings = { min: parseInt(commands[i + 1], 16), max: parseInt(commands[i + 2], 16) };
                        }
                        break;
                    case '17':
                        {
                            command_len = 4;
                            data.heatingCoolingTargetTempRanges = {
                                heatingTempMin: parseInt(commands[i + 1], 16),
                                heatingTempMax: parseInt(commands[i + 2], 16),
                                coolingTempMin: parseInt(commands[i + 3], 16),
                                coolingTempMax: parseInt(commands[i + 4], 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 '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 '2f':
                        {
                            // 2 bytes, 0.1 C resolution
                            command_len = 2;
                            data.targetTemperature = ((parseInt(commands[i + 1], 16) << 8) | parseInt(commands[i + 2], 16)) / 10;
                        }
                        break;
                    case '30':
                        {
                            // 2 bytes, 0.1 C resolution
                            command_len = 2;
                            data.manualTargetTemperatureUpdate = ((parseInt(commands[i + 1], 16) << 8) | parseInt(commands[i + 2], 16)) / 10;
                        }
                        break;
                    case '32':
                        {
                            command_len = 1;
                            data.valveOpenCloseTime = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '34':
                        {
                            command_len = 1;
                            data.displayRefreshPeriod = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '36':
                        {
                            command_len = 1;
                            data.extAutomaticTemperatureControl = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '3e':
                        {
                            // 2 bytes, 0.1 C resolution
                            command_len = 2;
                            data.extSensorTemperature = ((parseInt(commands[i + 1], 16) << 8) | parseInt(commands[i + 2], 16)) / 10;
                        }
                        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.fanSpeed = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '47':
                        {
                            command_len = 1;
                            data.fanSpeedLimit = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '49':
                        {
                            command_len = 2;
                            data.ecmVoltageRange = { min: parseInt(commands[i + 1], 16) / 10, max: parseInt(commands[i + 2], 16) / 10 };
                        }
                        break;
                    case '4b':
                        {
                            command_len = 1;
                            data.ecmStartUpTime = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '4d':
                        {
                            command_len = 1;
                            data.ecmRelay = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '4f':
                        {
                            command_len = 1;
                            data.frostProtection = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '51':
                        {
                            command_len = 2;
                            data.frostProtectionSettings = { threshold: parseInt(commands[i + 1], 16), setpoint: parseInt(commands[i + 2], 16) };
                        }
                        break;
                    case '53':
                        {
                            // named separately from the keepalive's operationalMode, which would otherwise overwrite it
                            command_len = 1;
                            data.fctOperationalMode = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '55':
                        {
                            command_len = 1;
                            data.allowedOperationalModes = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '57':
                        {
                            command_len = 1;
                            data.coolingSetpointNotOccupied = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '59':
                        {
                            command_len = 1;
                            data.heatingSetpointNotOccupied = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '5b':
                        {
                            command_len = 2;
                            data.tempSensorCompensation = { compensation: parseInt(commands[i + 1], 16), temperature: parseInt(commands[i + 2], 16) / 10 };
                        }
                        break;
                    case '5d':
                        {
                            command_len = 1;
                            data.fanSpeedNotOccupied = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '5f':
                        {
                            command_len = 1;
                            data.automaticChangeover = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '61':
                        {
                            command_len = 1;
                            data.wiringDiagram = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '63':
                        {
                            command_len = 1;
                            data.occFunction = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '65':
                        {
                            command_len = 2;
                            data.automaticChangeoverThreshold = { coolingThreshold: parseInt(commands[i + 1], 16), heatingThreshold: parseInt(commands[i + 2], 16) };
                        }
                        break;
                    case '67':
                        {
                            command_len = 1;
                            data.deviceStatus = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '69':
                        {
                            command_len = 1;
                            data.returnOfPowerOperation = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '6b':
                        {
                            command_len = 1;
                            data.deltaTemperature1 = parseInt(commands[i + 1], 16) / 10;
                        }
                        break;
                    case '6d':
                        {
                            command_len = 2;
                            data.deltaTemperature2and3 = { deltaTemperature2: parseInt(commands[i + 1], 16) / 10, deltaTemperature3: parseInt(commands[i + 2], 16) / 10 };
                        }
                        break;
                    case '6e':
                        {
                            command_len = 1;
                            data.frostProtectionStatus = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '70':
                        {
                            command_len = 1;
                            data.occupancySensorStatusSetPoint = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '71':
                        {
                            command_len = 1;
                            data.occupancySensorStatus = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '72':
                        {
                            command_len = 1;
                            data.dewPointSensorStatus = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '73':
                        {
                            command_len = 1;
                            data.filterAlarm = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '74':
                        {
                            command_len = 2;
                            data.automaticChangeoverMode = { ntcTemperature: parseInt(commands[i + 1], 16), automaticChangeover: parseInt(commands[i + 2], 16) };
                        }
                        break;
                    case '75':
                        {
                            command_len = 1;
                            data.powerModuleStatus = parseInt(commands[i + 1], 16);
                        }
                        break;
                    case '77':
                        {
                            command_len = 4
                            data.heatingCoolingTargetTempRangesUnoccupied = {
                                heatingTempMin: parseInt(commands[i + 1], 16),
                                heatingTempMax: parseInt(commands[i + 2], 16),
                                coolingTempMin: parseInt(commands[i + 3], 16),
                                coolingTempMax: parseInt(commands[i + 4], 16),
                            }
                        }
                        break;
                    case '79':
                        {
                            command_len = 1
                            data.fanOffDelayTime = parseInt(commands[i + 1], 16)
                        }
                        break
                    case '7b':
                        {
                            command_len = 1
                            data.additionalFanMode = parseInt(commands[i + 1], 16)
                        }
                        break;
                    case '7c':
                        {
                            command_len = 1
                            data.internalTemperatureSensorError = parseInt(commands[i + 1], 16)
                        }
                        break
                    case '7d':
                        {
                            command_len = 1
                            data.externalTemperatureSensorError = parseInt(commands[i + 1], 16)
                        }
                        break
                    case '7f':
                        {
                            // 00: Light (default), 01: Dark. FW >= 2.5
                            command_len = 1
                            data.displayColorMode = parseInt(commands[i + 1], 16)
                        }
                        break
                    case 'a0':
                       {
                          command_len = 4;
                          var fuota_address = parseInt(commands[i + 1] + commands[i + 2] + commands[i + 3] + 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;
                    case '9b':
                        {
                            command_len = 1
                            data.userInterfaceLanguage = parseInt(commands[i + 1], 16)
                        }
                        break
                    case 'a4':
                        {
                            // 00: EU868, 01: AS923, 02: AU915, 03: US915
                            command_len = 1
                            data.region = parseInt(commands[i + 1], 16)
                        }
                        break
                    default:
                        // reset, otherwise an unknown id consumes the previous command's length
                        command_len = 0;
                        break;
                }
                commands.splice(i, command_len);
            });
            return data;
        }
        if (bytes[0] == 1) {
            data = handleKeepalive(bytes, data);
        } else {
            data = handleResponse(bytes, data);
            bytes = bytes.slice(-11);
            data = handleKeepalive(bytes, data);
        }
        return { data: data };
    } catch (e) {
        throw new Error('Unhandled data');
    }
}
```

## DataCake Decoder

```
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;
}
```


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