TTN Smart Sensor (Uradmonitor)

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function uint16(value1, value2) { return (value1 << 8) + value2; } function uint24(value1, value2, value3) { return (value1 << 16) + (value2 << 8) + value3; } function uint24float(value1, value2, value3, multiplier) { var value = uint24(value1, value2, value3); if (value & 0x800000) return (value & 0x7FFFFF) / -multiplier; return value/multiplier; } function uint16float(value1, value2, multiplier) { var value = uint16(value1, value2); if (value & 0x8000) return (value & 0x7FFF) / -multiplier; return value/multiplier; } function decodeOrganicSensor(type, value1, value2, value3) { var lookup = { 0x2A: 'o3', 0x2B: 'so2', 0x2C: 'no2', 0x04: 'co', 0x03: 'h2s', 0x02: 'nh3', 0x31: 'cl2', }; var t = lookup[type]; if (!t) return null; return [t, uint24float(value1, value2, value3, 1000)]; } // ID 4B - "1400008E" // VERHW 1B - "06" (decimal 6, meaning INDUSTRIAL HW106) // VERSW 1B - "4E" (decimal 78, meaning firmware version 78) // TIMESTAMP 4B - "00001C20" (decimal 7200 sec) // LATITUDE 3B - “000000” (decimal 0, only on devices with NMEA GPS on pin RX6), DI24 encoded with 4 digits * // LONGITUDE 3B - “000000” (decimal 0, only on devices with NMEA GPS on pin RX6), DI24 encoded with 4 digits * // ALTITUDE 2B - “0000” (decimal 0, only on devices with NMEA GPS on pin RX6), DI16 encoded no digits ** // SPEED 2B - “0000” (decimal 0, only on devices with NMEA GPS on pin RX6), multiplied by 10. Divide by 10. // TEMPERATURE 2B - “0732" , value 18.42°C, DI16 encoded with 2 digits ** // PRESSURE 2B - "8797" offset encoded *** // HUMIDITY 1B - "82" multiplied by 2, 0.5RH resolution, decimal 130 / 2 = 65RH // VOC 3B - "031276" (decimal 201334ohms, or 201KO) // NOISE 1B - "A3" like humidity, multiplied by 2, 0.5dBA resolution, decimal 163/2 = 81dBA // SENSORGASID1 1B - "2A" (Ozone: O3=0x2A, NO2=0x2C, SO2=0x2B, CO=0x04, H2S=0x03, NH3=0x02, CL2=0x31) // SENSORGASCONC1 3B - "00028D" DI24 encoded, 3 digits *, 0.653ppm Ozone // SENSORGASID2 1B - "2C" (Nitrogen Dioxide: O3=0x2A,NO2=0x2C, SO2=0x2B, CO=0x04, H2S=0x03, NH3=0x02, CL2=0x31) // SENSORGASCONC2 3B - "00000D" DI24 encoded, 3 digits *, 0.013ppm NO2 // SENSORGASID3 1B - "2B" (Sulphur Dioxide: O3=0x2A, NO2=0x2C, SO2=0x2B, CO=0x04, H2S=0x03, NH3=0x02, CL2=0x31) // SENSORGASCONC3 3B - “00000A" DI24 encoded, 3 digits *, 0.01ppm SO2 // SENSORGASID4 1B - "04" (Carbon Monoxide: O3=0x2A,NO2=0x2C, SO2=0x2B, CO=0x04, H2S=0x03, NH3=0x02, CL2=0x31) // SENSORGASCONC4 3B - "000000" DI24 encoded, 3 digits *, 0ppm CO // PM1 1B - "02" (decimal 2 µg/m3, difference from PM2.5, final value PM2.5=7 - 2= 5 µg/m3 ) // PM2.5 2B - "0007" ( decimal 7 µg/m3) // PM10 1B - "00" (decimal 0 µg/m3, difference from PM2.5, final value PM2.5=7 + 2= 7 µg/m3 )) // CRC 1B - “45" **** function DecodePayload(bytes) { if (bytes.length != 50) return null; var obj = { model: "Industrial", hardware_version: "HW" + bytes[4], firmware_version: bytes[5], // timestamp: bytes[6, 7, 8, 9] // latitude: bytes[10, 11, 12] // longitude: bytes[13, 14, 15] // altitude: bytes[16, 17] // speed: bytes[18, 19] temperature: uint16float(bytes[20], bytes[21], 100), pressure: (uint16(bytes[22], bytes[23]) + 65535), humidity: (bytes[24]/2), gas_resistance: uint24(bytes[25], bytes[26], bytes[27]), sound: bytes[28]/2, }; var r; r = decodeOrganicSensor(bytes[29], bytes[30], bytes[31], bytes[32]); if (r) obj[r[0]] = r[1]; r = decodeOrganicSensor(bytes[33], bytes[34], bytes[35], bytes[36]); if (r) obj[r[0]] = r[1]; r = decodeOrganicSensor(bytes[37], bytes[38], bytes[39], bytes[40]); if (r) obj[r[0]] = r[1]; r = decodeOrganicSensor(bytes[41], bytes[42], bytes[43], bytes[44]); if (r) obj[r[0]] = r[1]; var pm1 = bytes[45]; var pm2_5 = uint16(bytes[46], bytes[47]); var pm10 = bytes[48]; pm1 = pm2_5 - pm1; pm10 = pm2_5 + pm10; obj.pm1 = pm1; obj.pm2_5 = pm2_5; obj.pm10 = pm10; obj.iaq = parseInt(Math.log(obj.gas_resistance) + 0.04 * obj.humidity, 10); return obj; } function decodeUplink(input) { return { "data": DecodePayload(input.bytes) } } function hexToBytes(hex) { for (var bytes = [], c = 0; c < hex.length; c += 2) bytes.push(parseInt(hex.substr(c, 2), 16)); return bytes; } //const payload = "1400008E064E00001C20000000000000000000000732879782031276A32A00028D2C00000D2B00000A040000000200070045"; //console.log(DecodePayload(hexToBytes(payload)));