TTN Smart Sensor (Rakwireless)

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// Source: // https://github.com/RAKWireless/RAKwireless_Standardized_Payload/blob/main/RAKwireless_Standardized_Payload.js /** * @reference https://github.com/myDevicesIoT/cayenne-docs/blob/master/docs/LORA.md * @reference http://openmobilealliance.org/wp/OMNA/LwM2M/LwM2MRegistry.html#extlabel * * Adapted for lora-app-server from https://gist.github.com/iPAS/e24970a91463a4a8177f9806d1ef14b8 * * Type IPSO LPP Hex Data Size Data Resolution per bit * Digital Input 3200 0 0 1 1 * Digital Output 3201 1 1 1 1 * Analog Input 3202 2 2 2 0.01 Signed * Analog Output 3203 3 3 2 0.01 Signed * Illuminance Sensor 3301 101 65 2 1 Lux Unsigned MSB * Presence Sensor 3302 102 66 1 1 * Temperature Sensor 3303 103 67 2 0.1 °C Signed MSB * Humidity Sensor 3304 104 68 1 0.5 % Unsigned * Accelerometer 3313 113 71 6 0.001 G Signed MSB per axis * Barometer 3315 115 73 2 0.1 hPa Unsigned MSB * Time 3333 133 85 4 Unix time MSB * Gyrometer 3334 134 86 6 0.01 °/s Signed MSB per axis * GPS Location 3336 136 88 9 Latitude : 0.0001 ° Signed MSB * Longitude : 0.0001 ° Signed MSB * Altitude : 0.01 meter Signed MSB * * Additional types * Generic Sensor 3300 100 64 4 Unsigned integer MSB * Voltage 3316 116 74 2 0.01 V Unsigned MSB * Current 3317 117 75 2 0.001 A Unsigned MSB * Frequency 3318 118 76 4 1 Hz Unsigned MSB * Percentage 3320 120 78 1 1% Unsigned * Altitude 3321 121 79 2 1m Signed MSB * Concentration 3325 125 7D 2 1 PPM unsigned : 1pmm = 1 * 10 ^-6 = 0.000 001 * Power 3328 128 80 2 1 W Unsigned MSB * Distance 3330 130 82 4 0.001m Unsigned MSB * Energy 3331 131 83 4 0.001kWh Unsigned MSB * Colour 3335 135 87 3 R: 255 G: 255 B: 255 * Direction 3332 132 84 2 1º Unsigned MSB * Switch 3342 142 8E 1 0/1 * * RAKwireless specific types * GPS Location 3337 137 89 11 Higher precision location information * Latitude : 0.000001 ° Signed MSB * Longitude : 0.000001 ° Signed MSB * Altitude : 0.01 meter Signed MSB * VOC index 3338 138 8A 1 VOC index * Wind Speed 3390 190 BE 2 Wind speed 0.01 m/s * Wind Direction 3391 191 BF 2 Wind direction 1º Unsigned MSB * Light Level 3403 203 CB 1 0 0-5 lux, 1 6-50 lux, 2 51-100 lux, 3 101-500 lux, 4 501-2000 lux, 6 >2000 lux * Soil Moisture 3388 188 BC 2 0.1 % in 0~100% (m3/m3) * Soil EC 3392 192 C0 2 0.001, mS/cm * Soil pH high prec. 3393 193 C1 2 0.01 pH * Soil pH low prec. 3394 194 C2 2 0.1 pH * Pyranometer 3395 195 C3 2 1 unsigned MSB (W/m2) * Precise Humidity 3312 112 70 2 0.1 %RH * */ // lppDecode decodes an array of bytes into an array of ojects, // each one with the channel, the data type and the value. function lppDecode(bytes) { var sensor_types = { 0: { 'size': 1, 'name': 'digital_in', 'signed': false, 'divisor': 1 }, 1: { 'size': 1, 'name': 'digital_out', 'signed': false, 'divisor': 1 }, 2: { 'size': 2, 'name': 'analog_in', 'signed': true, 'divisor': 100 }, 3: { 'size': 2, 'name': 'analog_out', 'signed': true, 'divisor': 100 }, 100: { 'size': 4, 'name': 'generic', 'signed': false, 'divisor': 1 }, 101: { 'size': 2, 'name': 'illuminance', 'signed': false, 'divisor': 1 }, 102: { 'size': 1, 'name': 'presence', 'signed': false, 'divisor': 1 }, 103: { 'size': 2, 'name': 'temperature', 'signed': true, 'divisor': 10 }, 104: { 'size': 1, 'name': 'humidity', 'signed': false, 'divisor': 2 }, 112: { 'size': 2, 'name': 'humidity_prec', 'signed': true, 'divisor': 10 }, 113: { 'size': 6, 'name': 'accelerometer', 'signed': true, 'divisor': 1000 }, 115: { 'size': 2, 'name': 'barometer', 'signed': false, 'divisor': 10 }, 116: { 'size': 2, 'name': 'voltage', 'signed': false, 'divisor': 100 }, 117: { 'size': 2, 'name': 'current', 'signed': false, 'divisor': 1000 }, 118: { 'size': 4, 'name': 'frequency', 'signed': false, 'divisor': 1 }, 120: { 'size': 1, 'name': 'percentage', 'signed': false, 'divisor': 1 }, 121: { 'size': 2, 'name': 'altitude', 'signed': true, 'divisor': 1 }, 125: { 'size': 2, 'name': 'concentration', 'signed': false, 'divisor': 1 }, 128: { 'size': 2, 'name': 'power', 'signed': false, 'divisor': 1 }, 130: { 'size': 4, 'name': 'distance', 'signed': false, 'divisor': 1000 }, 131: { 'size': 4, 'name': 'energy', 'signed': false, 'divisor': 1000 }, 132: { 'size': 2, 'name': 'direction', 'signed': false, 'divisor': 1 }, 133: { 'size': 4, 'name': 'time', 'signed': false, 'divisor': 1 }, 134: { 'size': 6, 'name': 'gyrometer', 'signed': true, 'divisor': 100 }, 135: { 'size': 3, 'name': 'colour', 'signed': false, 'divisor': 1 }, 136: { 'size': 9, 'name': 'gps', 'signed': true, 'divisor': [10000, 10000, 100] }, 137: { 'size': 11, 'name': 'gps', 'signed': true, 'divisor': [1000000, 1000000, 100] }, 138: { 'size': 2, 'name': 'voc', 'signed': false, 'divisor': 1 }, 142: { 'size': 1, 'name': 'switch', 'signed': false, 'divisor': 1 }, 188: { 'size': 2, 'name': 'soil_moist', 'signed': false, 'divisor': 10 }, 190: { 'size': 2, 'name': 'wind_speed', 'signed': false, 'divisor': 100 }, 191: { 'size': 2, 'name': 'wind_direction', 'signed': false, 'divisor': 1 }, 192: { 'size': 2, 'name': 'soil_ec', 'signed': false, 'divisor': 1000 }, 193: { 'size': 2, 'name': 'soil_ph_h', 'signed': false, 'divisor': 100 }, 194: { 'size': 2, 'name': 'soil_ph_l', 'signed': false, 'divisor': 10 }, 195: { 'size': 2, 'name': 'pyranometer', 'signed': false, 'divisor': 1 }, 203: { 'size': 1, 'name': 'light', 'signed': false, 'divisor': 1 }, }; function arrayToDecimal(stream, is_signed, divisor) { var value = 0; for (var i = 0; i < stream.length; i++) { if (stream[i] > 0xFF) throw 'Byte value overflow!'; value = (value << 8) | stream[i]; } if (is_signed) { var edge = 1 << (stream.length) * 8; // 0x1000.. var max = (edge - 1) >> 1; // 0x0FFF.. >> 1 value = (value > max) ? value - edge : value; } value /= divisor; return value; } var sensors = []; var i = 0; while (i < bytes.length) { var s_no = bytes[i++]; var s_type = bytes[i++]; if (typeof sensor_types[s_type] == 'undefined') { throw 'Sensor type error!: ' + s_type; } var s_value = 0; var type = sensor_types[s_type]; switch (s_type) { case 113: // Accelerometer case 134: // Gyrometer s_value = { 'x': arrayToDecimal(bytes.slice(i + 0, i + 2), type.signed, type.divisor), 'y': arrayToDecimal(bytes.slice(i + 2, i + 4), type.signed, type.divisor), 'z': arrayToDecimal(bytes.slice(i + 4, i + 6), type.signed, type.divisor) }; break; case 136: // GPS Location s_value = { 'latitude': arrayToDecimal(bytes.slice(i + 0, i + 3), type.signed, type.divisor[0]), 'longitude': arrayToDecimal(bytes.slice(i + 3, i + 6), type.signed, type.divisor[1]), 'altitude': arrayToDecimal(bytes.slice(i + 6, i + 9), type.signed, type.divisor[2]) }; break; case 137: // Precise GPS Location s_value = { 'latitude': arrayToDecimal(bytes.slice(i + 0, i + 4), type.signed, type.divisor[0]), 'longitude': arrayToDecimal(bytes.slice(i + 4, i + 8), type.signed, type.divisor[1]), 'altitude': arrayToDecimal(bytes.slice(i + 8, i + 11), type.signed, type.divisor[2]) }; sensors.push({ 'channel': s_no, 'type': s_type, 'name': 'location', 'value': "(" + s_value.latitude + "," + s_value.longitude + ")" }); sensors.push({ 'channel': s_no, 'type': s_type, 'name': 'altitude', 'value': s_value.altitude }); break; case 135: // Colour s_value = { 'r': arrayToDecimal(bytes.slice(i + 0, i + 1), type.signed, type.divisor), 'g': arrayToDecimal(bytes.slice(i + 1, i + 2), type.signed, type.divisor), 'b': arrayToDecimal(bytes.slice(i + 2, i + 3), type.signed, type.divisor) }; break; default: // All the rest s_value = arrayToDecimal(bytes.slice(i, i + type.size), type.signed, type.divisor); break; } sensors.push({ 'channel': s_no, 'type': s_type, 'name': type.name, 'value': s_value }); i += type.size; } return sensors; } function decodeUplink(input) { bytes = input.bytes; fPort = input.fPort; var response = {}; lppDecode(bytes, 1).forEach(function (field) { response[field['name'] + '_' + field['channel']] = field['value']; }); return { data: response, warnings: [], errors: [] }; }