mirror of https://github.com/arendst/Tasmota.git
Merge pull request #5817 from gemu2015/sgp30_compensation
Sgp30 compensation
This commit is contained in:
commit
c54bcf4b9a
0
lib/Adafruit_SGP30-1.0.0.13/.github/ISSUE_TEMPLATE.md → lib/Adafruit_SGP30-1.0.3/.github/ISSUE_TEMPLATE.md
vendored
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lib/Adafruit_SGP30-1.0.0.13/.github/ISSUE_TEMPLATE.md → lib/Adafruit_SGP30-1.0.3/.github/ISSUE_TEMPLATE.md
vendored
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lib/Adafruit_SGP30-1.0.0.13/.github/PULL_REQUEST_TEMPLATE.md → lib/Adafruit_SGP30-1.0.3/.github/PULL_REQUEST_TEMPLATE.md
vendored
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lib/Adafruit_SGP30-1.0.0.13/.github/PULL_REQUEST_TEMPLATE.md → lib/Adafruit_SGP30-1.0.3/.github/PULL_REQUEST_TEMPLATE.md
vendored
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0
lib/Adafruit_SGP30-1.0.0.13/.gitignore → lib/Adafruit_SGP30-1.0.3/.gitignore
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lib/Adafruit_SGP30-1.0.0.13/.gitignore → lib/Adafruit_SGP30-1.0.3/.gitignore
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lib/Adafruit_SGP30-1.0.0.13/.travis.yml → lib/Adafruit_SGP30-1.0.3/.travis.yml
Normal file → Executable file
0
lib/Adafruit_SGP30-1.0.0.13/.travis.yml → lib/Adafruit_SGP30-1.0.3/.travis.yml
Normal file → Executable file
58
lib/Adafruit_SGP30-1.0.0.13/Adafruit_SGP30.cpp → lib/Adafruit_SGP30-1.0.3/Adafruit_SGP30.cpp
Normal file → Executable file
58
lib/Adafruit_SGP30-1.0.0.13/Adafruit_SGP30.cpp → lib/Adafruit_SGP30-1.0.3/Adafruit_SGP30.cpp
Normal file → Executable file
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@ -37,7 +37,7 @@
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//#define I2C_DEBUG
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/**************************************************************************/
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/*!
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/*!
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@brief Instantiates a new SGP30 class
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*/
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/**************************************************************************/
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@ -45,7 +45,7 @@ Adafruit_SGP30::Adafruit_SGP30() {
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}
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/**************************************************************************/
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/*!
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/*!
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@brief Setups the hardware and detects a valid SGP30. Initializes I2C
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then reads the serialnumber and checks that we are talking to an SGP30
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@param theWire Optional pointer to I2C interface, otherwise use Wire
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@ -60,31 +60,32 @@ boolean Adafruit_SGP30::begin(TwoWire *theWire) {
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_i2c = theWire;
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}
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_i2c->begin();
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// assume i2c initialized already to avoid resetting clock stretching
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// _i2c->begin();
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uint8_t command[2];
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command[0] = 0x36;
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command[1] = 0x82;
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if (! readWordFromCommand(command, 2, 10, serialnumber, 3))
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if (! readWordFromCommand(command, 2, 10, serialnumber, 3))
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return false;
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uint16_t featureset;
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command[0] = 0x20;
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command[1] = 0x2F;
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if (! readWordFromCommand(command, 2, 10, &featureset, 1))
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if (! readWordFromCommand(command, 2, 10, &featureset, 1))
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return false;
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//Serial.print("Featureset 0x"); Serial.println(featureset, HEX);
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if (featureset != SGP30_FEATURESET)
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if (featureset != SGP30_FEATURESET)
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return false;
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if (! IAQinit())
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if (! IAQinit())
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return false;
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return true;
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}
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/**************************************************************************/
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/*!
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/*!
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@brief Commands the sensor to begin the IAQ algorithm. Must be called after startup.
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@returns True if command completed successfully, false if something went wrong!
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*/
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@ -97,7 +98,7 @@ boolean Adafruit_SGP30::IAQinit(void) {
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}
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/**************************************************************************/
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/*!
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/*!
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@brief Commands the sensor to take a single eCO2/VOC measurement. Places results in {@link TVOC} and {@link eCO2}
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@returns True if command completed successfully, false if something went wrong!
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*/
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@ -113,9 +114,9 @@ boolean Adafruit_SGP30::IAQmeasure(void) {
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eCO2 = reply[0];
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return true;
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}
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/**************************************************************************/
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/*!
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/*!
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@brief Request baseline calibration values for both CO2 and TVOC IAQ calculations. Places results in parameter memory locaitons.
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@param eco2_base A pointer to a uint16_t which we will save the calibration value to
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@param tvoc_base A pointer to a uint16_t which we will save the calibration value to
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@ -135,7 +136,7 @@ boolean Adafruit_SGP30::getIAQBaseline(uint16_t *eco2_base, uint16_t *tvoc_base)
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}
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/**************************************************************************/
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/*!
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/*!
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@brief Assign baseline calibration values for both CO2 and TVOC IAQ calculations.
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@param eco2_base A uint16_t which we will save the calibration value from
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@param tvoc_base A uint16_t which we will save the calibration value from
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@ -157,7 +158,30 @@ boolean Adafruit_SGP30::setIAQBaseline(uint16_t eco2_base, uint16_t tvoc_base) {
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}
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/**************************************************************************/
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/*!
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/*!
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@brief Set the absolute humidity value [mg/m^3] for compensation to increase precision of TVOC and eCO2.
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@param absolute_humidity A uint32_t [mg/m^3] which we will be used for compensation. If the absolute humidity is set to zero, humidity compensation will be disabled.
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@returns True if command completed successfully, false if something went wrong!
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*/
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/**************************************************************************/
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boolean Adafruit_SGP30::setHumidity(uint32_t absolute_humidity) {
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if (absolute_humidity > 256000) {
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return false;
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}
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uint16_t ah_scaled = (uint16_t)(((uint64_t)absolute_humidity * 256 * 16777) >> 24);
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uint8_t command[5];
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command[0] = 0x20;
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command[1] = 0x61;
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command[2] = ah_scaled >> 8;
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command[3] = ah_scaled & 0xFF;
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command[4] = generateCRC(command+2, 2);
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return readWordFromCommand(command, 5, 10);
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}
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/**************************************************************************/
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/*!
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@brief I2C low level interfacing
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*/
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/**************************************************************************/
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@ -186,16 +210,16 @@ boolean Adafruit_SGP30::readWordFromCommand(uint8_t command[], uint8_t commandLe
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delay(delayms);
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if (readlen == 0)
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if (readlen == 0)
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return true;
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uint8_t replylen = readlen * (SGP30_WORD_LEN +1);
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if (_i2c->requestFrom(_i2caddr, replylen) != replylen)
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if (_i2c->requestFrom(_i2caddr, replylen) != replylen)
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return false;
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uint8_t replybuffer[replylen];
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#ifdef I2C_DEBUG
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Serial.print("\t\t<- ");
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#endif
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#endif
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for (uint8_t i=0; i<replylen; i++) {
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replybuffer[i] = _i2c->read();
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#ifdef I2C_DEBUG
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1
lib/Adafruit_SGP30-1.0.0.13/Adafruit_SGP30.h → lib/Adafruit_SGP30-1.0.3/Adafruit_SGP30.h
Normal file → Executable file
1
lib/Adafruit_SGP30-1.0.0.13/Adafruit_SGP30.h → lib/Adafruit_SGP30-1.0.3/Adafruit_SGP30.h
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@ -42,6 +42,7 @@ class Adafruit_SGP30 {
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boolean getIAQBaseline(uint16_t *eco2_base, uint16_t *tvoc_base);
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boolean setIAQBaseline(uint16_t eco2_base, uint16_t tvoc_base);
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boolean setHumidity(uint32_t absolute_humidity);
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/**
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* The last measurement of the IAQ-calculated Total Volatile Organic Compounds in ppb. This value is set when you call {@link IAQmeasure()}
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0
lib/Adafruit_SGP30-1.0.0.13/README.md → lib/Adafruit_SGP30-1.0.3/README.md
Normal file → Executable file
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lib/Adafruit_SGP30-1.0.0.13/README.md → lib/Adafruit_SGP30-1.0.3/README.md
Normal file → Executable file
16
lib/Adafruit_SGP30-1.0.0.13/examples/sgp30test/sgp30test.ino → lib/Adafruit_SGP30-1.0.3/examples/sgp30test/sgp30test.ino
Normal file → Executable file
16
lib/Adafruit_SGP30-1.0.0.13/examples/sgp30test/sgp30test.ino → lib/Adafruit_SGP30-1.0.3/examples/sgp30test/sgp30test.ino
Normal file → Executable file
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@ -3,6 +3,17 @@
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Adafruit_SGP30 sgp;
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/* return absolute humidity [mg/m^3] with approximation formula
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* @param temperature [°C]
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* @param humidity [%RH]
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*/
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uint32_t getAbsoluteHumidity(float temperature, float humidity) {
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// approximation formula from Sensirion SGP30 Driver Integration chapter 3.15
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const float absoluteHumidity = 216.7f * ((humidity / 100.0f) * 6.112f * exp((17.62f * temperature) / (243.12f + temperature)) / (273.15f + temperature)); // [g/m^3]
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const uint32_t absoluteHumidityScaled = static_cast<uint32_t>(1000.0f * absoluteHumidity); // [mg/m^3]
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return absoluteHumidityScaled;
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}
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void setup() {
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Serial.begin(9600);
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Serial.println("SGP30 test");
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@ -22,6 +33,11 @@ void setup() {
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int counter = 0;
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void loop() {
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// If you have a temperature / humidity sensor, you can set the absolute humidity to enable the humditiy compensation for the air quality signals
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//float temperature = 22.1; // [°C]
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//float humidity = 45.2; // [%RH]
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//sgp.setHumidity(getAbsoluteHumidity(temperature, humidity));
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if (! sgp.IAQmeasure()) {
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Serial.println("Measurement failed");
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return;
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2
lib/Adafruit_SGP30-1.0.0.13/library.properties → lib/Adafruit_SGP30-1.0.3/library.properties
Normal file → Executable file
2
lib/Adafruit_SGP30-1.0.0.13/library.properties → lib/Adafruit_SGP30-1.0.3/library.properties
Normal file → Executable file
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@ -1,5 +1,5 @@
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name=Adafruit SGP30 Sensor
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version=1.0.2
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version=1.0.3
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author=Adafruit
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maintainer=Adafruit <info@adafruit.com>
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sentence=This is an Arduino library for the Adafruit SGP30 Gas / Air Quality Sensor
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0
lib/Adafruit_SGP30-1.0.0.13/license.txt → lib/Adafruit_SGP30-1.0.3/license.txt
Normal file → Executable file
0
lib/Adafruit_SGP30-1.0.0.13/license.txt → lib/Adafruit_SGP30-1.0.3/license.txt
Normal file → Executable file
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@ -34,55 +34,122 @@ Adafruit_SGP30 sgp;
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uint8_t sgp30_type = 0;
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uint8_t sgp30_ready = 0;
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uint8_t sgp30_counter = 0;
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float sgp30_abshum;
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/********************************************************************************************/
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void sgp30_Init(void) {
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if (sgp.begin()) {
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sgp30_type = 1;
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// snprintf_P(log_data, sizeof(log_data), PSTR("SGP: Serialnumber 0x%04X-0x%04X-0x%04X"), sgp.serialnumber[0], sgp.serialnumber[1], sgp.serialnumber[2]);
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// AddLog(LOG_LEVEL_DEBUG);
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snprintf_P(log_data, sizeof(log_data), S_LOG_I2C_FOUND_AT, "SGP30", 0x58);
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AddLog(LOG_LEVEL_DEBUG);
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}
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}
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//#define POW_FUNC pow
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#define POW_FUNC FastPrecisePow
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float sgp30_AbsoluteHumidity(float temperature, float humidity,char tempUnit) {
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//taken from https://carnotcycle.wordpress.com/2012/08/04/how-to-convert-relative-humidity-to-absolute-humidity/
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//precision is about 0.1°C in range -30 to 35°C
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//August-Roche-Magnus 6.1094 exp(17.625 x T)/(T + 243.04)
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//Buck (1981) 6.1121 exp(17.502 x T)/(T + 240.97)
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//reference https://www.eas.ualberta.ca/jdwilson/EAS372_13/Vomel_CIRES_satvpformulae.html
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float temp = NAN;
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const float mw = 18.01534; // molar mass of water g/mol
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const float r = 8.31447215; // Universal gas constant J/mol/K
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if (isnan(temperature) || isnan(humidity) ) {
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return NAN;
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}
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if (tempUnit != 'C') {
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temperature = (temperature - 32.0) * (5.0 / 9.0); /*conversion to [°C]*/
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}
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temp = POW_FUNC(2.718281828, (17.67 * temperature) / (temperature + 243.5));
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//return (6.112 * temp * humidity * 2.1674) / (273.15 + temperature); //simplified version
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return (6.112 * temp * humidity * mw) / ((273.15 + temperature) * r); //long version
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}
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#define SAVE_PERIOD 30
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void Sgp30Update(void) // Perform every second to ensure proper operation of the baseline compensation algorithm
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{
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sgp30_ready = 0;
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if (!sgp30_type) {
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if (sgp.begin()) {
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sgp30_type = 1;
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// AddLog_P2(LOG_LEVEL_DEBUG, PSTR("SGP: Serialnumber 0x%04X-0x%04X-0x%04X"), sgp.serialnumber[0], sgp.serialnumber[1], sgp.serialnumber[2]);
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AddLog_P2(LOG_LEVEL_DEBUG, S_LOG_I2C_FOUND_AT, "SGP30", 0x58);
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if (!sgp.IAQmeasure() || !sgp30_type) {
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// retry to init every 100 seconds
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if (21 == (uptime %100)) {
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sgp30_Init();
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}
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} else {
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if (!sgp.IAQmeasure()) return; // Measurement failed
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sgp30_counter++;
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if (30 == sgp30_counter) {
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sgp30_counter = 0;
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return; // Measurement failed
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}
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if (global_update) {
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// abs hum in mg/m3
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sgp30_abshum=sgp30_AbsoluteHumidity(global_temperature,global_humidity,TempUnit());
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sgp.setHumidity(sgp30_abshum*1000);
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}
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sgp30_ready = 1;
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uint16_t TVOC_base;
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uint16_t eCO2_base;
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// these should normally be stored permanently and used for fast restart
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if (!(uptime%SAVE_PERIOD)) {
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// store settings every N seconds
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uint16_t TVOC_base;
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uint16_t eCO2_base;
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if (!sgp.getIAQBaseline(&eCO2_base, &TVOC_base)) return; // Failed to get baseline readings
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// snprintf_P(log_data, sizeof(log_data), PSTR("SGP: Baseline values eCO2 0x%04X, TVOC 0x%04X"), eCO2_base, TVOC_base);
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// AddLog(LOG_LEVEL_DEBUG);
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if (!sgp.getIAQBaseline(&eCO2_base, &TVOC_base)) return; // Failed to get baseline readings
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// AddLog_P2(LOG_LEVEL_DEBUG, PSTR("SGP: Baseline values eCO2 0x%04X, TVOC 0x%04X"), eCO2_base, TVOC_base);
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}
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sgp30_ready = 1;
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}
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}
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#ifdef USE_WEBSERVER
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const char HTTP_SNS_SGP30[] PROGMEM =
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"{s}SGP30 " D_ECO2 "{m}%d " D_UNIT_PARTS_PER_MILLION "{e}" // {s} = <tr><th>, {m} = </th><td>, {e} = </td></tr>
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"{s}SGP30 " D_TVOC "{m}%d " D_UNIT_PARTS_PER_BILLION "{e}";
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const char HTTP_SNS_AHUM[] PROGMEM = "{s}SGP30 " "Abs Humidity" "{m}%s g/m3{e}";
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#endif
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#define D_JSON_AHUM "aHumidity"
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void Sgp30Show(bool json)
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{
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if (sgp30_ready) {
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char abs_hum[33];
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if (global_update) {
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// has humidity + temperature
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dtostrfd(sgp30_abshum,4,abs_hum);
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}
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if (json) {
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ResponseAppend_P(PSTR(",\"SGP30\":{\"" D_JSON_ECO2 "\":%d,\"" D_JSON_TVOC "\":%d}"), sgp.eCO2, sgp.TVOC);
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ResponseAppend_P(PSTR(",\"SGP30\":{\"" D_JSON_ECO2 "\":%d,\"" D_JSON_TVOC "\":%d"), sgp.eCO2, sgp.TVOC);
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if (global_update) {
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ResponseAppend_P(PSTR(",\"" D_JSON_AHUM "\":%s"),abs_hum);
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}
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ResponseAppend_P(PSTR("}"));
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#ifdef USE_DOMOTICZ
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if (0 == tele_period) DomoticzSensor(DZ_AIRQUALITY, sgp.eCO2);
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#endif // USE_DOMOTICZ
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#ifdef USE_WEBSERVER
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} else {
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WSContentSend_PD(HTTP_SNS_SGP30, sgp.eCO2, sgp.TVOC);
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if (global_update) {
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WSContentSend_PD(HTTP_SNS_AHUM, abs_hum);
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}
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#endif
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}
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}
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}
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/*********************************************************************************************\
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* Interface
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\*********************************************************************************************/
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@ -93,6 +160,9 @@ bool Xsns21(uint8_t function)
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if (i2c_flg) {
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switch (function) {
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case FUNC_INIT:
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sgp30_Init();
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break;
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case FUNC_EVERY_SECOND:
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Sgp30Update();
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break;
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@ -110,4 +180,4 @@ bool Xsns21(uint8_t function)
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}
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#endif // USE_SGP30
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#endif // USE_I2C
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#endif // USE_I2C
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