TTN Smart Sensor (Keller)

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/* This is just a decoder for the TTN live viewer. The complete payload format protocol can be found here: https://docs.pressuresuite.com/sending-technology/lora-technology/keller-lora-payload/*/ /* This code is from https://github.com/KELLERAGfuerDruckmesstechnik/KellerAgTheThingsNetworkPayloadDecoder */ function decodeUplink(input) { var port = input.fPort; var bytes = input.bytes; var functionCode = bytes[0]; var decoded = { func: functionCode, port: port, payload: bytes.map(function (byte) { return pad(byte.toString(16).toUpperCase(), 2); }).join('') }; if (functionCode === 12) { fillUpDecodedDeviceInformation(bytes, decoded); // Device sends information package, has to be decoded differently } else if (functionCode === 1) { fillUpDecodedMeasurements(bytes, decoded); // Device sends measurement package } else { return { data: decoded, warnings: ["This function code is not supported in this decoder."], errors: [] } } return { data: decoded, warnings: [], errors: [] }; } function encodeDownlink(input) { return { data: { bytes: input.bytes }, warnings: ["Encoding of downlink is not supported by the JS decoder. Yet, it is possible to use downlink telegrams using the correct payload (https://docs.pressuresuite.com/sending-technology/ADT1%20LoRa%20data%20communication%20protocol%2002_2020.pdf)"], errors: [] } } function decodeDownlink(input) { return { data: { bytes: input.bytes }, warnings: ["Decoding of downlink is not supported by the JS decoder. Yet, it is possible to use downlink telegrams using the correct payload (https://docs.pressuresuite.com/sending-technology/ADT1%20LoRa%20data%20communication%20protocol%2002_2020.pdf)"], errors: [] } } // Decode the device information package and append it to the result object function fillUpDecodedDeviceInformation(bytes, result) { result.battery_voltage = bytesToFloat(bytes.slice(14, 18)); result.battery_capacity_percentage = bytes[18]; result.humidity_percentage = bytes[19]; result.class_group_text = pad(bytes[2], 2) + '.' + pad(bytes[3], 2); result.sw_version_text = pad(bytes[4], 2) + '.' + pad(bytes[5], 2); result.serial_number = bytesToInt(bytes.slice(6, 10)); result.device_local_datetime = bytesToDate(bytes.slice(10, 14)); } // Decode the device measurement package and append it to the result object function fillUpDecodedMeasurements(bytes, result) { // ct = connection type result.ct = bytes[1]; result.channel = bytesToBinaryString(bytes.slice(2, 4), 2); result.channelCount = result.channel.match(/1/g).length; var channelsReverted = result.channel.split("").reverse().join(""); var firstIndex = channelsReverted.indexOf('1'); // Loop through all additional package content. Every group of 4 Bytes // contains information for another channel (Channel 1, Channel 2, ...) for (var i = 1; i <= result.channelCount; i++) { var msbIndex = i * 4; var byteValue = bytes.slice(msbIndex, msbIndex + 4); result[deviceTypesToChannelNames[result.ct][firstIndex]] = bytesToFloat(byteValue); firstIndex = channelsReverted.indexOf('1', firstIndex + 1); } } // Convert an array of bytes into a float: bytesToFloat([ 0x3B, 0x2F, 0x7A, 0x1A ]) => 0.0026775659061968327 // Based on https://stackoverflow.com/a/37471538 by Ilya Bursov function bytesToFloat(bytes) { // JavaScript bitwise operators yield a 32 bits integer, not a float. // Assume MSB (most significant byte first). var bits = bytes[0] << 24 | bytes[1] << 16 | bytes[2] << 8 | bytes[3]; var sign = (bits >>> 31 === 0) ? 1.0 : -1.0; var e = bits >>> 23 & 0xff; var m = (e === 0) ? (bits & 0x7fffff) << 1 : (bits & 0x7fffff) | 0x800000; var f = sign * m * Math.pow(2, e - 150); return f; } // Convert an array of bytes into a binary string: bytesToBinaryString([ 0x25, 0x4D, 0x4F, 0xCA ]) => '00100101010011010100111111001010' function bytesToBinaryString(bytes) { var binary = ''; for (var i = 0, l = bytes.length; i < l; i++) { var bits = bytes[i].toString(2); while (bits.length < 8) { bits = '0' + bits; } binary = binary + bits; } return binary; } // Convert an array of bytes into an integer: bytesToInt([ 0x25, 0x4D, 0x4F, 0xCA ]) => 625823690 function bytesToInt(bytes) { var binaryString = bytesToBinaryString(bytes); if (binaryString.length == 0) { return 0; } return parseInt(binaryString, 2); } // Convert an array of bytes into a UTC date. The bytes array must represent // the number of seconds since "2000-01-01T00:00:00.000": bytesToDate([ 0x25, 0x4D, 0x4F, 0xCA ]) => 2019-10-31 07:54:50 function bytesToDate(bytes) { var zero = new Date('2000-01-01T00:00:00.000Z').getTime(); var time = bytesToInt(bytes) * 1000; var date = new Date(zero + time); var year = date.getUTCFullYear(); var month = pad(date.getUTCMonth() + 1, 2); var day = pad(date.getUTCDate(), 2); var hours = pad(date.getUTCHours(), 2); var minutes = pad(date.getUTCMinutes(), 2); var seconds = pad(date.getUTCSeconds(), 2); return year + '-' + month + '-' + day + ' ' + hours + ':' + minutes + ':' + seconds; } // Prepends a number of "0" to a parameter. pad(7, 2) => '07' function pad(num, size) { var s = num.toString(); while (s.length < size) s = '0' + s; return s; } var map = { 1: 'Pd (P1-P2)', 2: 'P1', 3: 'P2', 4: 'T', 5: 'TOB1', 6: 'TOB2', 7: 'PBaro', 8: 'TBaro', 9: 'Volt Inp. 1', 10: 'Volt Inp. 2', 11: 'Pd (P1-PBaro)', 12: 'Conductivity Tc', 13: 'Conductivity raw', 14: 'T (Conductivity)', 15: 'P1 (2)', 16: 'P1 (3)', 17: 'P1 (4)', 18: 'P1 (5)', 19: 'Counter input', 20: 'SDI12 CH1', 21: 'SDI12 CH2', 22: 'SDI12 CH3', 23: 'SDI12 CH4', 24: 'SDI12 CH5', 25: 'SDI12 CH6', 26: 'SDI12 CH7', 27: 'SDI12 CH8', 28: 'SDI12 CH9', 29: 'SDI12 CH10', 30: 'TOB1 (2)', 31: 'TOB1 (3)', 32: 'TOB1 (4)', 33: 'TOB1 (5)', 34: 'E', 35: 'F', 36: 'G', 37: 'mH20 (PBaro)', 38: 'mH20 (P1-P2)', 39: 'mH20 (P1-P3)', 40: 'mH20 (P1-P4)', 41: 'mH20 (P1-P5)', 42: 'Conductivity Tc (2)', 43: 'Conductivity Tc (3)', 44: 'T (Conductivity) (2)', 45: 'T (Conductivity) (3)', 46: 'P2 (2)', 47: 'TOB2 (2)', 48: 'AquaMaster Flow Rate', 49: 'AquaMaster Pressure', 50: 'AquaMaster Custom Flow Units', 51: 'AquaMaster External Supply Voltage', 52: 'Tank Content 1', 53: 'Tank Content 2', 54: 'Tank Content 3', }; var deviceTypesToChannelNames = { 0: [map[1], map[2], map[3], map[4], map[5], map[6]], 1: [map[1], map[2], map[3], map[4], map[5], map[6]], 2: [map[11], map[2], map[3], map[4], map[5], map[6], map[7], map[8]], 3: [map[11], map[2], map[3], map[4], map[5], map[6], map[7], map[8]], 4: [map[1], map[2], map[3], map[4], map[5], map[6], map[7], map[8], map[9], map[10]], 5: [map[11], map[2], map[3], map[4], map[5], map[6], map[7], map[8], map[9], map[10], map[11]], 6: [map[1], map[2], map[3], map[4], map[5], map[6], map[7], map[8], map[9], map[10], map[15], map[16], map[17], map[18], map[19]], 7: [map[7], map[8], map[9], map[10], map[20], map[21], map[22], map[23], map[24], map[25], map[26], map[27], map[28], map[29]], 8: [map[2], map[5], map[15], map[30], map[16], map[31], map[17], map[32], map[18], map[33], map[9], map[10], map[7], map[8], map[19]], 9: [map[1], map[2], map[3], map[14], map[5], map[6], map[7], map[8], map[9], map[10], map[12], map[13]], 10: [map[11], map[2], map[3], map[14], map[5], map[6], map[7], map[8], map[9], map[10], map[12], map[13]], 11: [map[2], map[5], map[12], map[14], map[15], map[30], map[42], map[44], map[16], map[31], map[43], map[45], map[7], map[8], map[19]], 13: [map[2], map[3], map[5], map[6], map[15], map[46], map[30], map[47], map[7], map[8], map[9], map[10], map[19]], };