IOT-GLOBAL-SOLUTIONS - Global Solutions Siglink

Codec Preview

/* eslint-disable no-bitwise */ /** * IoT global solutions Siglink Decoder * * definition [11bytes] * * [10]: device_type * [09]: message_type * [08-07]: battery_idle, unit: V * [06-05]: temperature, unit: °C * [04-03]: humidity, unit: % * [02-01]: battery_tx, unit: V * [00]: sensor_status */ function Decoder(bytes) { const decoded = []; if (bytes.length !== 11) { return [{ variable: "parser_error", value: "Parser error: message need to have 11 bytes" }]; } // DEVICE TYPE if (bytes.readUInt8(0) !== 3) { return [{ variable: "parser_error", value: "Parser error: device type must be 03" }]; } decoded.push({ variable: "device_type", value: bytes.readUInt8(0) }); if (bytes.readUInt8(1) !== 0) { return [{ variable: "parser_error", value: "Parser error: message type must be 00" }]; } // MESSAGE TYPE decoded.push({ variable: "message_type", value: bytes.readUInt8(1) }); // BATTERY IDLE decoded.push({ variable: "battery_idle", value: bytes.readUInt16BE(2) / 1000, unit: "V" }); // TEMPERATURE if ((bytes.readUInt16BE(4) & 0x8000) !== 0x00) { decoded.push({ variable: "temperature", value: (bytes.readUInt16BE(4) - 65536) / 10, unit: "°C" }); } else { decoded.push({ variable: "temperature", value: bytes.readUInt16BE(4) / 10, unit: "°C" }); } // HUMIDITY decoded.push({ variable: "humidity", value: bytes.readUInt16BE(6) / 10, unit: "%" }); // BATTERY TX if (bytes.readUInt16BE(8) === 0) { decoded.push({ variable: "battery_tx", value: null, unit: "V" }); } else { decoded.push({ variable: "battery_tx", value: bytes.readUInt16BE(8) / 1000, unit: "V" }); } // SENSOR STATUS decoded.push({ variable: "sensor_status", value: bytes.readUInt8(10) }); return decoded; } const data = payload.find((x) => x.variable === "payload_raw" || x.variable === "payload" || x.variable === "data"); if (data) { const buffer = Buffer.from(data.value, "hex"); const serie = new Date().getTime(); payload = Decoder(buffer); payload = payload.map((x) => ({ ...x, serie })); }