TTN Smart Sensor (Develiot)

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function decodeUplink(input) { var decoded = {}; var port = input.fPort; if (port === 12) decoded = { data: decodePort12Bytes(input.bytes) }; else { decoded = { errors: ["Unknown port"] }; } return decoded; } // 15 | 00 00 00 00 | 00 00 00 00 | FF | BF //V8 function decodePort12Bytes(bytes) { var decodedPayload = decodeV8Payloads(bytes); return decodedPayload; } function decodeV8Payloads(bytes) { var firmwareVersion = bytes[0] >> 4; var activatedServices = checkActiveServices((bytes[0] & 0x0F)); var pulseCntr1 = convertByteArrayToInt(arraySplice(bytes, 1, 4)); var pulseCntr2 = convertByteArrayToInt(arraySplice(bytes, 1, 4)); // var batteryStatus = convertByteArrayToInt(bytes.splice(1, 1)) / 1000; var batteryStatus = parseFloat(_map(convertByteArrayToInt(arraySplice(bytes, 1, 1)), 0, 255, 0, 3.3).toFixed(2)); var temperature = parseFloat(_map(convertByteArrayToInt(arraySplice(bytes, 1, 1)), 0, 255, -30, 60).toFixed(2)); var decoded = { type: "status", hardwareVersion: 8, firmwareVersion: firmwareVersion, pulseCounter1: pulseCntr1, pulseCounter2: pulseCntr2, batteryLevel: batteryStatus, temperature: temperature, }; if (activatedServices) { decoded.activatedServices = activatedServices; } return decoded; } function convertByteArrayToInt(bytes) { function toHexString(byteArray) { return Array.prototype.map.call(byteArray, function (byte) { return ('0' + (byte & 0xFF).toString(16)).slice(-2); }).join(''); } var hex = toHexString(bytes.reverse()); return parseInt(hex, 16); } function _map(x, x1, x2, y1, y2) { return ((x - x1) * (y2 - y1) / (x2 - x1) + y1); } function checkActiveServices(hex) { function _checkState(value, pos) { return ((value >> pos) & 1); } var ENABLED_SERVICES = []; var SERVICES = [ "LORASENSE_REPORT_SERVICE_PULSE_COUNTER1", "LORASENSE_REPORT_SERVICE_PULSE_COUNTER2", "LORASENSE_REPORT_SERVICE_TEMPERATURE", ]; for (var i = 0; i < 3; i++) { if (_checkState(hex, i)) { ENABLED_SERVICES.push(SERVICES[i]); } } return ENABLED_SERVICES; } function arraySplice(array, start, deleteCount) { var result = []; var removed = []; var argsLen = arguments.length; var arrLen = array.length; var i, k; // Follow spec more or less start = parseInt(start, 10); deleteCount = parseInt(deleteCount, 10); // Deal with negative start per spec // Don't assume support for Math.min/max if (start < 0) { start = arrLen + start; start = (start > 0)? start : 0; } else { start = (start < arrLen)? start : arrLen; } // Deal with deleteCount per spec if (deleteCount < 0) deleteCount = 0; if (deleteCount > (arrLen - start)) { deleteCount = arrLen - start; } // Copy members up to start for (i = 0; i < start; i++) { result[i] = array[i]; } // Add new elements supplied as args for (i = 3; i < argsLen; i++) { result.push(arguments[i]); } // Copy removed items to removed array for (i = start; i < start + deleteCount; i++) { removed.push(array[i]); } // Add those after start + deleteCount for (i = start + (deleteCount || 0); i < arrLen; i++) { result.push(array[i]); } // Update original array array.length = 0; i = result.length; while (i--) { array[i] = result[i]; } // Return array of removed elements return removed; }