DRAGINO - Lt 33222 L

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/* This is an generic payload parser example. ** The code find the payload variable and parse it if exists. ** ** IMPORTANT: In most case, you will only need to edit the parsePayload function. ** ** Testing: ** You can do manual tests to this parse by using the Device Emulator. Copy and Paste the following code: ** [{ "variable": "payload", "value": "0109611395" }] ** ** The ignore_vars variable in this code should be used to ignore variables ** from the device that you don't want. */ // Add ignorable variables in this array. const ignore_vars = ['fcnt', 'EUI', 'port', 'ts', 'freq', 'dr', 'cmd', 'ack']; /** * This is the main function to parse the payload. Everything else doesn't require your attention. * @param {String} payload_raw * @returns {Object} containing key and value to TagoIO */ function parsePayload(payload_raw) { try { // If your device is sending something different than hex, like base64, just specify it bellow. const bytes = Buffer.from(payload_raw, 'hex'); var value = bytes[0] << 8 | bytes[1]; if (bytes[0] & 0x80) { value |= 0xFFFF0000; } var ACI1 = (value / 1000).toFixed(3); //ACI1 Current, units:mA value = bytes[2] << 8 | bytes[3]; if (bytes[2] & 0x80) { value |= 0xFFFF0000; } var ACI2 = (value / 1000).toFixed(3); // ACI2 Current, units:mA value = bytes[4] << 8 | bytes[5]; if (bytes[4] & 0x80) { value |= 0xFFFF0000; } var AVI1 = (value / 1000).toFixed(3); // AVI1 voltage, units:V value = bytes[6] << 8 | bytes[7]; if (bytes[6] & 0x80) { value |= 0xFFFF0000; } var AVI2 = (value / 1000).toFixed(3); // AVI2 voltage, units:V value = bytes[8] var DO1 = (value & 0x01) ? "L" : "H"; //DO1，Digital Output Status var DO2 = (value & 0x02) ? "L" : "H"; //DO2，Digital Output Status var DO3 = (value & 0x04) ? "L" : "H"; //DO3，Digital Output Status var DI1 = (value & 0x08) ? "H" : "L"; //DI1，Digital Input Status var DI2 = (value & 0x10) ? "H" : "L"; //DI2，Digital Input Status var DI3 = (value & 0x20) ? "H" : "L"; //DI3，Digital Input Status var RO2 = (value & 0x40) ? "ON" : "OFF"; //RO2，Relay Status var RO1 = (value & 0x80) ? "ON" : "OFF"; //RO1，Relay StatusLT Series IO Controller const data = [ { variable: 'ACI1', value: Number(ACI1), unit: 'mA' }, { variable: 'ACI2', value: Number(ACI2), unit: 'mA' }, { variable: 'AVI1', value: Number(AVI1), unit: 'V' }, { variable: 'AVI2', value: Number(AVI2), unit: 'V' }, { variable: 'DO1', value: DO1 }, { variable: 'DO2', value: DO2 }, { variable: 'DO3', value: DO3 }, { variable: 'DI1', value: DI1 }, { variable: 'DI2', value: DI2 }, { variable: 'DI3', value: DI3 }, { variable: 'RO1', value: RO1 }, { variable: 'RO2', value: RO2 }, ]; return data; } catch (e) { console.log(e); // Return the variable parse_error for debugging. return [{ variable: 'parse_error', value: e.message }]; } } // Remove unwanted variables. payload = payload.filter(x => !ignore_vars.includes(x.variable)); // Payload is an environment variable. Is where what is being inserted to your device comes in. // Payload always is an array of objects. [ { variable, value...}, {variable, value...} ...] const payload_raw = payload.find(x => x.variable === 'payload_raw' || x.variable === 'payload' || x.variable === 'data'); if (payload_raw) { // Get a unique serie for the incoming data. const { value, serie, time } = payload_raw; // Parse the payload_raw to JSON format (it comes in a String format) if (value) { payload = payload.concat(parsePayload(value).map(x => ({ ...x, serie, time: x.time || time }))); } }