DRAGINO - Lwl02

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/* * LDS02 * Payload total 10 bytes * value -> Status&BAT (unit V) - Size(bytes) = 2 * MOD Always:0x02 - Size(bytes) = 1 * Total open door events - Size(bytes) = 3 * Last door open duration (unit: min) = Size(bytes) = 3 * alarm - Size(bytes) = 1 */ function Decoder(bytes) { // Decode an uplink message from a buffer // (array) of bytes to an object of fields. const value = ((bytes[0] << 8) | bytes[1]) & 0x3fff; const bat = value / 1000; const water_leak_status = bytes[0] & 0x40 ? 1 : 0; const mod = bytes[2]; const leak_times = bytes[3] | bytes[4] | bytes[5]; const leak_duration = bytes[6] | bytes[7] | bytes[8]; // units:min if (bytes.length === 10 && bytes[0] < 0x07 < 0x0f) { return [ { variable: "bat_v", value: bat, unit: "v" }, { variable: "mod", value: mod }, { variable: "water_leak_status", value: water_leak_status }, { variable: "water_leak_times", value: leak_times }, { variable: "last_water_leak_duration", value: leak_duration, unit: "min" }, ]; } } const payload_raw = payload.find((x) => x.variable === "payload_raw" || x.variable === "payload" || x.variable === "data" || x.variable === "payload_hex" ); if (payload_raw) { try { // Convert the data from Hex to Javascript Buffer. const buffer = Buffer.from(payload_raw.value, "hex"); const serie = new Date().getTime(); const payload_aux = Decoder(buffer); payload = payload.concat(payload_aux.map((x) => ({ ...x, serie }))); } catch (e) { // Print the error to the Live Inspector. console.error(e); // Return the variable parse_error for debugging. payload = [{ variable: "parse_error", value: e.message }]; } }