DRAGINO - Llms01

Codec Preview

/* * LLMS01 * Payload total 11 bytes * value -> BAT (unit V) - Size(bytes) = 2 * Temperature - Size(bytes) = 2 * Leaf Moisture - Size(bytes) = 2 * Leaf Temperature - Size(bytes) = 2 * Digital Interrupt - Size(bytes) = 1 * Reserved - Size(bytes) = 1 * Message Type- Size(bytes) = 1 */ function Decoder(bytes) { // Decode an uplink message from a buffer // (array) of bytes to an object of fields. let value = ((bytes[0] << 8) | bytes[1]) & 0x3fff; const batV = value / 1000; value = (bytes[2] << 8) | bytes[3]; if (bytes[2] & 0x80) { value |= 0xffff0000; } const temp_DS18B20 = (value / 10).toFixed(2); value = (bytes[4] << 8) | bytes[5]; const moisture = (value / 10).toFixed(2); value = (bytes[6] << 8) | bytes[7]; let temp = 0; if ((value & 0x8000) >> 15 === 0) temp = (value / 10).toFixed(2); else if ((value & 0x8000) >> 15 === 1) temp = ((value - 0xffff) / 10).toFixed(2); const i_flag = bytes[8]; const mes_type = bytes[10]; return [ { variable: "bat", value: batV, unit: "v" }, { variable: "tempc_ds18b20", value: temp_DS18B20, unit: "°c" }, { variable: "leaf_moisture", value: moisture, unit: "%" }, { variable: "leaf_temperature", value: temp, unit: "°c" }, { variable: "interrupt_flag", value: i_flag }, { variable: "message_type", value: mes_type }, ]; } const payload_raw = payload.find((x) => x.variable === "payload_raw" || x.variable === "payload" || x.variable === "data"); 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 }]; } }