TEKTELIC - Breeze Indoor Air Quality Co2 Sensor

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/* * Smart Room Sensor (Gen 4) */ function signed_convert(val, bitwidth) { const isnegative = val & (1 << (bitwidth - 1)); const boundary = 1 << bitwidth; const minval = -boundary; const mask = boundary - 1; return isnegative ? minval + (val & mask) : val; } function Decoder(bytes, port, string_find) { // Decode an uplink message from a buffer // (array) of bytes to an object of fields. // Device Info Not Repeated const array_result = []; if (port === 10) { // CO2 Concentration(PressureCompensated) if (string_find.search("0be4") !== -1) { const result = string_find.search("0be4") / 2 + 2; const co2_pressure_compensated = (bytes[result] << 8) | bytes[result + 1]; array_result.push({ variable: "co2_pressure_compensated", value: co2_pressure_compensated, unit: "ppm" }); } if (string_find.search("0BE4") !== -1) { const result = string_find.search("0BE4") / 2 + 2; const co2_pressure_compensated = (bytes[result] << 8) | bytes[result + 1]; array_result.push({ variable: "co2_pressure_compensated", value: co2_pressure_compensated, unit: "ppm" }); } // CO2 Concentration(Raw) if (string_find.search("0ee4") !== -1) { const result = string_find.search("0be4") / 2 + 2; const co2_raw = (bytes[result] << 8) | bytes[result + 1]; array_result.push({ variable: "co2_raw", value: co2_raw, unit: "ppm" }); } if (string_find.search("0EE4") !== -1) { const result = string_find.search("0EE4") / 2 + 2; const co2_raw = (bytes[result] << 8) | bytes[result + 1]; array_result.push({ variable: "co2_raw", value: co2_raw, unit: "ppm" }); } // Atmospheric Pressure if (string_find.search("0c73") !== -1) { const result = string_find.search("0c73") / 2 + 2; const atmospheric_pressure = ((bytes[result] << 8) | bytes[result + 1]) * 0.1; array_result.push({ variable: "atmospheric_pressure", value: atmospheric_pressure, unit: "hPa" }); } if (string_find.search("0C73") !== -1) { const result = string_find.search("0C73") / 2 + 2; const atmospheric_pressure = ((bytes[result] << 8) | bytes[result + 1]) * 0.1; array_result.push({ variable: "atmospheric_pressure", value: atmospheric_pressure, unit: "hPa" }); } // Motion (PIR) Event State if (string_find.search("0a00") !== -1) { const result = string_find.search("0a00") / 2 + 2; const motion_event_state = bytes[result]; array_result.push({ variable: "motion_event_state", value: motion_event_state }); } if (string_find.search("0A00") !== -1) { const result = string_find.search("0A00") / 2 + 2; const motion_event_state = bytes[result]; array_result.push({ variable: "motion_event_state", value: motion_event_state }); } // Motion (PIR) Event Count if (string_find.search("0d04") !== -1) { const result = string_find.search("0d04") / 2 + 2; const motion_event_count = (bytes[result] << 8) | bytes[result + 1]; array_result.push({ variable: "motion_event_count", value: motion_event_count }); } if (string_find.search("0D04") !== -1) { const result = string_find.search("0D04") / 2 + 2; const motion_event_count = (bytes[result] << 8) | bytes[result + 1]; array_result.push({ variable: "motion_event_count", value: motion_event_count }); } // Ambient Temperature if (string_find.search("0367") !== -1) { const result = string_find.search("0367") / 2 + 2; const ambient_temperature = (bytes[result] << 8) | bytes[result + 1]; const temperature = signed_convert(ambient_temperature, 16) * 0.1; array_result.push({ variable: "temperature", value: temperature, unit: "°C" }); } // Ambient RH if (string_find.search("0468") !== -1) { const result = string_find.search("0468") / 2 + 2; const relative_humidity = bytes[result] * 0.5; array_result.push({ variable: "relative_humidity", value: relative_humidity, unit: "%" }); } // Ambient Light State if (string_find.search("0200") !== -1) { const result = string_find.search("0200") / 2 + 2; const light_state = bytes[result]; array_result.push({ variable: "light_state", value: light_state }); } // Ambient Light Intensity if (string_find.search("1002") !== -1) { const result = string_find.search("1002") / 2 + 2; const light_intensity = ((bytes[result] << 8) | bytes[result + 1]) * 0.1; array_result.push({ variable: "light_intensity", value: light_intensity }); } return array_result; } } const payload_raw = payload.find((x) => x.variable === "payload_raw" || x.variable === "payload" || x.variable === "data" || x.variable === "payload_hex"); const port = payload.find((x) => x.variable === "port" || x.variable === "fport" || x.variable === "FPort"); 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 string_find = payload_raw.value; const payload_aux = Decoder(buffer, port.value, string_find); 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 }]; } }