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sensor: add support for SmartMeasure SM300D2-VO2 air quality multi-se…
…nsor (#2447) * Support for SmartMeasure SM300D2-VO2 air quality multi-sensor * Fix temperature sign, using hexDecode * Update README.md
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,253 @@ | ||
| // ----------------------------------------------------------------------------- | ||
| // SmartMeasure SM300D2-VO2 | ||
| // https://es.aliexpress.com/item/32984571140.html | ||
| // Uses SoftwareSerial library | ||
| // Copyright (C) 2021 by Xose Pérez <xose dot perez at gmail dot com> | ||
| // ----------------------------------------------------------------------------- | ||
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| #if SENSOR_SUPPORT && SM300D2_SUPPORT | ||
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| #pragma once | ||
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| #include <SoftwareSerial.h> | ||
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| #include "BaseSensor.h" | ||
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| class SM300D2Sensor : public BaseSensor { | ||
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| public: | ||
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| // --------------------------------------------------------------------- | ||
| // Public | ||
| // --------------------------------------------------------------------- | ||
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| SM300D2Sensor() { | ||
| _count = 7; | ||
| _sensor_id = SENSOR_SM300D2_ID; | ||
| } | ||
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| ~SM300D2Sensor() { | ||
| if (_serial) delete _serial; | ||
| } | ||
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| // --------------------------------------------------------------------- | ||
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| void setRX(unsigned char pin_rx) { | ||
| if (_pin_rx == pin_rx) return; | ||
| _pin_rx = pin_rx; | ||
| _dirty = true; | ||
| } | ||
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| // --------------------------------------------------------------------- | ||
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| unsigned char getRX() { | ||
| return _pin_rx; | ||
| } | ||
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| // --------------------------------------------------------------------- | ||
| // Sensor API | ||
| // --------------------------------------------------------------------- | ||
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| // Initialization method, must be idempotent | ||
| void begin() { | ||
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| if (!_dirty) return; | ||
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| if (_serial) delete _serial; | ||
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| if (3 == _pin_rx) { | ||
| Serial.begin(SM300D2_BAUDRATE); | ||
| } else if (13 == _pin_rx) { | ||
| Serial.begin(SM300D2_BAUDRATE); | ||
| Serial.flush(); | ||
| Serial.swap(); | ||
| } else { | ||
| _serial = new SoftwareSerial(_pin_rx, -1, false); | ||
| _serial->enableIntTx(false); | ||
| _serial->begin(SM300D2_BAUDRATE); | ||
| } | ||
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| _ready = true; | ||
| _dirty = false; | ||
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| } | ||
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| // Descriptive name of the sensor | ||
| String description() { | ||
| char buffer[28]; | ||
| if (_serial_is_hardware()) { | ||
| snprintf(buffer, sizeof(buffer), "SM300D2 @ HwSerial"); | ||
| } else { | ||
| snprintf(buffer, sizeof(buffer), "SM300D2 @ SwSerial(%u,NULL)", _pin_rx); | ||
| } | ||
| return String(buffer); | ||
| } | ||
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| // Descriptive name of the slot # index | ||
| String description(unsigned char index) { | ||
| return description(); | ||
| }; | ||
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| // Address of the sensor (it could be the GPIO or I2C address) | ||
| String address(unsigned char index) { | ||
| char buffer[6]; | ||
| snprintf(buffer, sizeof(buffer), "%u", _pin_rx); | ||
| return String(buffer); | ||
| } | ||
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| // Type for slot # index | ||
| unsigned char type(unsigned char index) { | ||
| if (index == 0) return MAGNITUDE_CO2; | ||
| if (index == 1) return MAGNITUDE_CH2O; | ||
| if (index == 2) return MAGNITUDE_TVOC; | ||
| if (index == 3) return MAGNITUDE_PM2dot5; | ||
| if (index == 4) return MAGNITUDE_PM10; | ||
| if (index == 5) return MAGNITUDE_TEMPERATURE; | ||
| if (index == 6) return MAGNITUDE_HUMIDITY; | ||
| return MAGNITUDE_NONE; | ||
| } | ||
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| // Current value for slot # index | ||
| double value(unsigned char index) { | ||
| if (index == 0) return _co2; | ||
| if (index == 1) return _ch2o; | ||
| if (index == 2) return _tvoc; | ||
| if (index == 3) return _pm25; | ||
| if (index == 4) return _pm100; | ||
| if (index == 5) return _temperature; | ||
| if (index == 6) return _humidity; | ||
| return 0; | ||
| } | ||
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| // Process sensor UART | ||
| void tick() { | ||
| _read(); | ||
| } | ||
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| protected: | ||
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| // --------------------------------------------------------------------- | ||
| // Protected | ||
| // --------------------------------------------------------------------- | ||
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| bool _serial_is_hardware() { | ||
| return (3 == _pin_rx) || (13 == _pin_rx); | ||
| } | ||
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| bool _serial_available() { | ||
| if (_serial_is_hardware()) { | ||
| return Serial.available(); | ||
| } else { | ||
| return _serial->available(); | ||
| } | ||
| } | ||
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| void _serial_flush() { | ||
| if (_serial_is_hardware()) { | ||
| return Serial.flush(); | ||
| } else { | ||
| return _serial->flush(); | ||
| } | ||
| } | ||
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| uint8_t _serial_read() { | ||
| if (_serial_is_hardware()) { | ||
| return Serial.read(); | ||
| } else { | ||
| return _serial->read(); | ||
| } | ||
| } | ||
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| // --------------------------------------------------------------------- | ||
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| void _parse() { | ||
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| #if SENSOR_DEBUG | ||
| char hex[(sizeof(_buffer)*2)+1] = {0}; | ||
| if (hexEncode(_buffer, sizeof(_buffer), hex, sizeof(hex))) { | ||
| DEBUG_MSG("[SENSOR] SM300D2: %s\n", hex); | ||
| } | ||
| #endif | ||
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| // check second header byte | ||
| if (_buffer[1] != 0x02) { | ||
| #if SENSOR_DEBUG | ||
| DEBUG_MSG("[SENSOR] SM300D2: Wrong header\n"); | ||
| #endif | ||
| return; | ||
| } | ||
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| // check crc | ||
| uint8_t crc = 0; | ||
| for (unsigned char i=0; i<16; i++) crc += _buffer[i]; | ||
| if (crc != _buffer[16]) { | ||
| #if SENSOR_DEBUG | ||
| DEBUG_MSG("[SENSOR] SM300D2: Wrong CRC\n"); | ||
| #endif | ||
| return; | ||
| } | ||
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| // CO2 | ||
| _co2 = 256 * _buffer[2] + _buffer[3]; | ||
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| // CH2O | ||
| _ch2o = 256 * _buffer[4] + _buffer[5]; | ||
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| // TVOC | ||
| _tvoc = 256 * _buffer[6] + _buffer[7]; | ||
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| // PM 2.5 | ||
| _pm25 = 256 * _buffer[8] + _buffer[9]; | ||
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| // PM 10 | ||
| _pm100 = 256 * _buffer[10] + _buffer[11]; | ||
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| // Temperature | ||
| _temperature = (_buffer[12] & 0x7F) + (float) _buffer[13] / 10.0; | ||
| if ((_buffer[12] & 0x80) == 0x80) { | ||
| _temperature = -_temperature; | ||
| } | ||
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| // Humidity | ||
| _humidity = _buffer[14] + (float) _buffer[15] / 10.0; | ||
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| } | ||
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| void _read() { | ||
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| while(_serial_available()) { | ||
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| unsigned char ch = _serial_read(); | ||
| if ((_position > 0) || (ch == 0x3C)) { | ||
| _buffer[_position] = ch; | ||
| _position++; | ||
| if (_position == 17) { | ||
| _position = 0; | ||
| _parse(); | ||
| } | ||
| } | ||
| yield(); | ||
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| } | ||
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| } | ||
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| // --------------------------------------------------------------------- | ||
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| unsigned char _buffer[17] = {0}; | ||
| unsigned char _position = 0; | ||
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| double _co2 = 0; | ||
| double _ch2o = 0; | ||
| double _tvoc = 0; | ||
| double _pm25 = 0; | ||
| double _pm100 = 0; | ||
| double _temperature = 0; | ||
| double _humidity = 0; | ||
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| unsigned int _pin_rx; | ||
| SoftwareSerial * _serial = NULL; | ||
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| }; | ||
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| #endif // SENSOR_SUPPORT && SM300D2_SUPPORT |
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