Em-Series - Em310-Udl

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/** * Payload Encoder * * Copyright 2025 Milesight IoT * * @product EM310-UDL */ var RAW_VALUE = 0x00; /* eslint no-redeclare: "off" */ /* eslint-disable */ // Chirpstack v4 function encodeDownlink(input) { var encoded = milesightDeviceEncode(input.data); return { bytes: encoded }; } // Chirpstack v3 function Encode(fPort, obj) { return milesightDeviceEncode(obj); } // The Things Network function Encoder(obj, port) { return milesightDeviceEncode(obj); } /* eslint-enable */ function milesightDeviceEncode(payload) { var encoded = []; if ("reboot" in payload) { encoded = encoded.concat(reboot(payload.reboot)); } if ("collection_interval" in payload) { encoded = encoded.concat(setCollectionInterval(payload.collection_interval)); } if ("report_interval" in payload) { encoded = encoded.concat(setReportInterval(payload.report_interval)); } if ("distance_alarm_config" in payload) { encoded = encoded.concat(setDistanceAlarmConfig(payload.distance_alarm_config)); } return encoded; } /** * reboot device * @param {number} reboot values: (0: no, 1: yes) * @example { "reboot": 1 } */ function reboot(reboot) { var yes_no_map = { 0: "no", 1: "yes" }; var yes_no_values = getValues(yes_no_map); if (yes_no_values.indexOf(reboot) === -1) { throw new Error("reboot must be one of " + yes_no_values.join(", ")); } if (getValue(yes_no_map, reboot) === 0) { return []; } return [0xff, 0x10, 0xff]; } /** * set collection interval * @param {number} collection_interval unit: second, range: [10, 60] * @example { "collection_interval": 300 } */ function setCollectionInterval(collection_interval) { if (typeof collection_interval !== "number") { throw new Error("collection_interval must be a number"); } if (collection_interval < 10 || collection_interval > 60) { throw new Error("collection_interval must be in range [10, 60]"); } var buffer = new Buffer(4); buffer.writeUInt8(0xff); buffer.writeUInt8(0x02); buffer.writeUInt16LE(collection_interval); return buffer.toBytes(); } /** * report interval configuration * @param {number} report_interval uint: second * @example payload: { "report_interval": 600 } */ function setReportInterval(report_interval) { if (typeof report_interval !== "number") { throw new Error("report_interval must be a number"); } if (report_interval < 1) { throw new Error("report_interval must be greater than 1"); } var buffer = new Buffer(4); buffer.writeUInt8(0xff); buffer.writeUInt8(0x03); buffer.writeUInt16LE(report_interval); return buffer.toBytes(); } /** * set distance threshold alarm configuration * @param {object} distance_alarm_config * @param {number} distance_alarm_config.condition values: (0: disable, 1: below, 2: above, 3: between, 4: outside) * @param {number} distance_alarm_config.threshold_min condition=(below, within, outside) * @param {number} distance_alarm_config.threshold_max condition=(above, within, outside) * @param {number} distance_alarm_config.lock_time * @param {number} distance_alarm_config.continue_time * @param {number} distance_alarm_config.alarm_release_enable values: (0: disable, 1: enable) */ function setDistanceAlarmConfig(distance_alarm_config) { var condition = distance_alarm_config.condition; var threshold_min = distance_alarm_config.threshold_min; var threshold_max = distance_alarm_config.threshold_max; var lock_time = distance_alarm_config.lock_time; var continue_time = distance_alarm_config.continue_time; var alarm_release_enable = distance_alarm_config.alarm_release_enable; var condition_map = { 0: "disable", 1: "below", 2: "above", 3: "between", 4: "outside" }; var condition_values = getValues(condition_map); if (condition_values.indexOf(condition) === -1) { throw new Error("distance_alarm_config.condition must be one of " + condition_values.join(", ")); } var enable_map = { 0: "disable", 1: "enable" }; var enable_values = getValues(enable_map); if (enable_values.indexOf(alarm_release_enable) === -1) { throw new Error("distance_alarm_config.alarm_release_enable must be one of " + enable_values.join(", ")); } var data = 0x00; data |= getValue(condition_map, condition); data |= 1 << 3; data |= getValue(enable_map, alarm_release_enable) << 7; var buffer = new Buffer(11); buffer.writeUInt8(0xff); buffer.writeUInt8(0x06); buffer.writeUInt8(data); buffer.writeInt16LE(threshold_min * 10); buffer.writeInt16LE(threshold_max * 10); buffer.writeUInt16LE(lock_time); buffer.writeUInt16LE(continue_time); return buffer.toBytes(); } function getValues(map) { var values = []; for (var key in map) { values.push(RAW_VALUE ? parseInt(key) : map[key]); } return values; } function getValue(map, value) { if (RAW_VALUE) return value; for (var key in map) { if (map[key] === value) { return parseInt(key); } } throw new Error("not match in " + JSON.stringify(map)); } function Buffer(size) { this.buffer = new Array(size); this.offset = 0; for (var i = 0; i < size; i++) { this.buffer[i] = 0; } } Buffer.prototype._write = function (value, byteLength, isLittleEndian) { var offset = 0; for (var index = 0; index < byteLength; index++) { offset = isLittleEndian ? index << 3 : (byteLength - 1 - index) << 3; this.buffer[this.offset + index] = (value >> offset) & 0xff; } }; Buffer.prototype.writeUInt8 = function (value) { this._write(value, 1, true); this.offset += 1; }; Buffer.prototype.writeInt8 = function (value) { this._write(value < 0 ? value + 0x100 : value, 1, true); this.offset += 1; }; Buffer.prototype.writeUInt16LE = function (value) { this._write(value, 2, true); this.offset += 2; }; Buffer.prototype.writeInt16LE = function (value) { this._write(value < 0 ? value + 0x10000 : value, 2, true); this.offset += 2; }; Buffer.prototype.writeUInt32LE = function (value) { this._write(value, 4, true); this.offset += 4; }; Buffer.prototype.writeInt32LE = function (value) { this._write(value < 0 ? value + 0x100000000 : value, 4, true); this.offset += 4; }; Buffer.prototype.writeD2DCommand = function (value, defaultValue) { if (typeof value !== "string") { value = defaultValue; } if (value.length !== 4) { throw new Error("d2d_cmd length must be 4"); } this.buffer[this.offset] = parseInt(value.substr(2, 2), 16); this.buffer[this.offset + 1] = parseInt(value.substr(0, 2), 16); this.offset += 2; }; Buffer.prototype.toBytes = function () { return this.buffer; };