[rev2] Fix AirQuality readings by restructuring BSEC library

library.properties

@@ -7,8 +7,4 @@ paragraph=Allows you to control all the components included in the Explore IoT K
 category=Sensors
 url=https://github.com/arduino-libraries/Arduino_MKRIoTCarrier
 architectures=samd
-precompiled=false
-depends=Arduino_APDS9960,Arduino_BQ24195,Arduino_HTS221,Arduino_LPS22HB,Arduino_LSM6DS3,Arduino_LSM6DSOX,Adafruit BusIO,Adafruit DotStar,Adafruit GFX Library,Adafruit ST7735 and ST7789 Library,Arduino_MCHPTouch,TFT_eSPI
-dot_a_linkage=true
-precompiled=true
-ldflags=-lalgobsec
+depends=Arduino_APDS9960,Arduino_BQ24195,Arduino_HTS221,Arduino_LPS22HB,Arduino_LSM6DS3,Arduino_LSM6DSOX,Adafruit BusIO,Adafruit DotStar,Adafruit GFX Library,Adafruit ST7735 and ST7789 Library,Arduino_MCHPTouch,TFT_eSPI,BSEC Software Library

src/AirQualityClass.cpp

@@ -29,31 +29,52 @@ AirQualityClass::~AirQualityClass()
 {
 }
 
+/* Configure the BSEC library with information about the sensor
+    18v/33v = Voltage at Vdd. 1.8V or 3.3V
+    3s/300s = BSEC operating mode, BSEC_SAMPLE_RATE_LP or BSEC_SAMPLE_RATE_ULP
+    4d/28d = Operating age of the sensor in days
+    generic_18v_3s_4d
+    generic_18v_3s_28d
+    generic_18v_300s_4d
+    generic_18v_300s_28d
+    generic_33v_3s_4d
+    generic_33v_3s_28d
+    generic_33v_300s_4d
+    generic_33v_300s_28d
+*/
+
+extern "C" const uint8_t bsec_config_iaq[] = {
+#include "config/generic_33v_3s_4d/bsec_iaq.txt"
+};
+
 int AirQualityClass::begin()
 {
   _revision = board_revision();
   if (_revision == BOARD_REVISION_2) {
     if (mkr_iot_carrier_rev2::iaqSensor == nullptr) {
       iaqSensor = new Bsec();
-      iaqSensor->begin(BME680_I2C_ADDR_PRIMARY, Wire);
+      iaqSensor->begin(BME68X_I2C_ADDR_LOW, Wire);
       if (checkIaqSensorStatus() == STATUS_ERROR){
         return 0;
       }
+      iaqSensor->setConfig(bsec_config_iaq);
 
-      bsec_virtual_sensor_t sensorList[10] = {
-        BSEC_OUTPUT_RAW_TEMPERATURE,
-        BSEC_OUTPUT_RAW_PRESSURE,
-        BSEC_OUTPUT_RAW_HUMIDITY,
-        BSEC_OUTPUT_RAW_GAS,
+      bsec_virtual_sensor_t sensorList[13] = {
         BSEC_OUTPUT_IAQ,
         BSEC_OUTPUT_STATIC_IAQ,
         BSEC_OUTPUT_CO2_EQUIVALENT,
         BSEC_OUTPUT_BREATH_VOC_EQUIVALENT,
+        BSEC_OUTPUT_RAW_TEMPERATURE,
+        BSEC_OUTPUT_RAW_PRESSURE,
+        BSEC_OUTPUT_RAW_HUMIDITY,
+        BSEC_OUTPUT_RAW_GAS,
+        BSEC_OUTPUT_STABILIZATION_STATUS,
+        BSEC_OUTPUT_RUN_IN_STATUS,
         BSEC_OUTPUT_SENSOR_HEAT_COMPENSATED_TEMPERATURE,
         BSEC_OUTPUT_SENSOR_HEAT_COMPENSATED_HUMIDITY,
+        BSEC_OUTPUT_GAS_PERCENTAGE
       };
-
-      iaqSensor->updateSubscription(sensorList, 10, BSEC_SAMPLE_RATE_CONTINUOUS);
+      iaqSensor->updateSubscription(sensorList, 13, BSEC_SAMPLE_RATE_LP);
       if (checkIaqSensorStatus() == STATUS_ERROR){
         return 0;
       }
@@ -68,14 +89,14 @@ int AirQualityClass::begin()
 
 int AirQualityClass::checkIaqSensorStatus(void)
 {
-  if (iaqSensor->status != BSEC_OK) {
-    if (iaqSensor->status < BSEC_OK) {
+  if (iaqSensor->bsecStatus != BSEC_OK) {
+    if (iaqSensor->bsecStatus < BSEC_OK) {
      return STATUS_ERROR;
     }
   }
 
-  if (iaqSensor->bme680Status != BME680_OK) {
-    if (iaqSensor->bme680Status < BME680_OK) {
+  if (iaqSensor->bme68xStatus != BME68X_OK) {
+    if (iaqSensor->bme68xStatus < BME68X_OK) {
      return STATUS_ERROR;
     }
   }
@@ -92,62 +113,63 @@ void AirQualityClass::end()
 
 float AirQualityClass::readVOC()
 {
-  float reading = 0.0;
   if (_revision == BOARD_REVISION_2) {
-    while(!iaqSensor->run()){ }
-    reading = iaqSensor->breathVocEquivalent;
+    if(iaqSensor->run()){
+      mkr_iot_carrier_rev2::cache();
+    }
   }
-  return reading;
+  return mkr_iot_carrier_rev2::breathVocEquivalent;
 }
 
 float AirQualityClass::readGasResistor()
 {
-  float reading = 0.0;
   if (_revision == BOARD_REVISION_2) {
-    while(!iaqSensor->run()){ }
-    reading = iaqSensor->gasResistance;
+    if(iaqSensor->run()){
+      mkr_iot_carrier_rev2::cache();
+    }
   }
-  return reading;
+  return mkr_iot_carrier_rev2::gasResistance;
 }
 
 float AirQualityClass::readIAQ()
 {
-  float reading = 0.0;
   if (_revision == BOARD_REVISION_2) {
-    while(!iaqSensor->run()){ }
-    reading = iaqSensor->iaq;
+    if(iaqSensor->run()){
+      mkr_iot_carrier_rev2::cache();
+    }
   }
-  return reading;
+  return mkr_iot_carrier_rev2::iaq;
 }
 
 float AirQualityClass::readIAQAccuracy()
 {
-  float reading = 0.0;
   if (_revision == BOARD_REVISION_2) {
-    while(!iaqSensor->run()){ }
-    reading = iaqSensor->iaqAccuracy;
+    if(iaqSensor->run()){
+      mkr_iot_carrier_rev2::cache();
+    }
   }
-  return reading;
+  return mkr_iot_carrier_rev2::iaqAccuracy;
 }
 
 float AirQualityClass::readStaticIAQ()
 {
-  float reading = 0.0;
   if (_revision == BOARD_REVISION_2) {
-    while(!iaqSensor->run()){ }
-    reading = iaqSensor->staticIaq;
+    if(iaqSensor->run()){
+      mkr_iot_carrier_rev2::cache();
+    }
   }
-  return reading;
+  return mkr_iot_carrier_rev2::staticIaq;
 }
 
 
 float AirQualityClass::readCO2()
 {
   float reading = 0.0;
   if (_revision == BOARD_REVISION_2) {
-    while(!iaqSensor->run()){ }
-    reading = iaqSensor->co2Equivalent;
+    if(iaqSensor->run()){
+      mkr_iot_carrier_rev2::cache();
+    }
   }
-  return reading;
+  return mkr_iot_carrier_rev2::co2Equivalent;
 }
 

src/Arduino_MKRIoTCarrier.cpp

@@ -23,7 +23,19 @@
 //Touch pads values for using the case or just directly on the board
 //Define on the sketch to use it
 bool CARRIER_CASE = false;
-
+
+mkr_iot_carrier_rev2 mkr_iot_carrier_rev2_instance;
+Bsec* mkr_iot_carrier_rev2::iaqSensor;
+float mkr_iot_carrier_rev2::breathVocEquivalent;
+float mkr_iot_carrier_rev2::gasResistance;
+float mkr_iot_carrier_rev2::iaq;
+float mkr_iot_carrier_rev2::iaqAccuracy;
+float mkr_iot_carrier_rev2::staticIaq;
+float mkr_iot_carrier_rev2::co2Equivalent;
+float mkr_iot_carrier_rev2::temperature;
+float mkr_iot_carrier_rev2::pressure;
+float mkr_iot_carrier_rev2::humidity;
+
 MKRIoTCarrier::MKRIoTCarrier() {
 }
 
@@ -34,6 +46,7 @@ int MKRIoTCarrier::begin() {
   pinMode(AREF_PIN,INPUT_PULLUP);
   if (digitalRead(AREF_PIN) == LOW) {
     MKRIoTCarrier::_revision = BOARD_REVISION_2;
+    mkr_iot_carrier_rev2::iaqSensor = nullptr;
   } else {
     MKRIoTCarrier::_revision = BOARD_REVISION_1;
   }
@@ -73,9 +86,11 @@ int MKRIoTCarrier::begin() {
   Relay2.begin();
 
   //Sensors
-  uint8_t  sensorsOK = !Light.begin() << 0 |  !Pressure.begin() << 1 | !IMUmodule.begin() << 2  | !Env.begin() << 3 |
-    (_revision == BOARD_REVISION_2 ? !AirQuality.begin() << 4 : 0);
-
+  uint8_t  sensorsOK = (_revision == BOARD_REVISION_2 ? !AirQuality.begin() << 4 : 0) |
+                       !Light.begin() << 0 |
+                       !Pressure.begin() << 1 |
+                       !IMUmodule.begin() << 2 |
+                       !Env.begin() << 3;
 
   //If some of the sensors are not connected
   if(sensorsOK > 0 ){

src/EnvClass.cpp

@@ -30,31 +30,37 @@ EnvClass::~EnvClass()
 {
 }
 
+extern const uint8_t bsec_config_iaq[];
+
 int EnvClass::begin()
 {
   _revision = board_revision();
   if (_revision == BOARD_REVISION_2) {
     if (mkr_iot_carrier_rev2::iaqSensor == nullptr) {
       iaqSensor = new Bsec();
-      iaqSensor->begin(BME680_I2C_ADDR_PRIMARY, Wire);
+      iaqSensor->begin(BME68X_I2C_ADDR_LOW, Wire);
       if (checkIaqSensorStatus() == STATUS_ERROR){
         return 0;
       }
+      iaqSensor->setConfig(bsec_config_iaq);
 
-      bsec_virtual_sensor_t sensorList[10] = {
-        BSEC_OUTPUT_RAW_TEMPERATURE,
-        BSEC_OUTPUT_RAW_PRESSURE,
-        BSEC_OUTPUT_RAW_HUMIDITY,
-        BSEC_OUTPUT_RAW_GAS,
+      bsec_virtual_sensor_t sensorList[13] = {
         BSEC_OUTPUT_IAQ,
         BSEC_OUTPUT_STATIC_IAQ,
         BSEC_OUTPUT_CO2_EQUIVALENT,
         BSEC_OUTPUT_BREATH_VOC_EQUIVALENT,
+        BSEC_OUTPUT_RAW_TEMPERATURE,
+        BSEC_OUTPUT_RAW_PRESSURE,
+        BSEC_OUTPUT_RAW_HUMIDITY,
+        BSEC_OUTPUT_RAW_GAS,
+        BSEC_OUTPUT_STABILIZATION_STATUS,
+        BSEC_OUTPUT_RUN_IN_STATUS,
         BSEC_OUTPUT_SENSOR_HEAT_COMPENSATED_TEMPERATURE,
         BSEC_OUTPUT_SENSOR_HEAT_COMPENSATED_HUMIDITY,
+        BSEC_OUTPUT_GAS_PERCENTAGE
       };
 
-      iaqSensor->updateSubscription(sensorList, 10, BSEC_SAMPLE_RATE_CONTINUOUS);
+      iaqSensor->updateSubscription(sensorList, 10, BSEC_SAMPLE_RATE_LP);
       if (checkIaqSensorStatus() == STATUS_ERROR){
         return 0;
       }
@@ -73,14 +79,14 @@ int EnvClass::begin()
 
 int EnvClass::checkIaqSensorStatus(void)
 {
-  if (iaqSensor->status != BSEC_OK) {
-    if (iaqSensor->status < BSEC_OK) {
+  if (iaqSensor->bsecStatus != BSEC_OK) {
+    if (iaqSensor->bsecStatus < BSEC_OK) {
         return 0;
     }
   }
 
-  if (iaqSensor->bme680Status != BME680_OK) {
-    if (iaqSensor->bme680Status < BME680_OK) {
+  if (iaqSensor->bme68xStatus != BME68X_OK) {
+    if (iaqSensor->bme68xStatus < BME68X_OK) {
       return 0;
     }
   }
@@ -102,12 +108,13 @@ void EnvClass::end()
 float EnvClass::readTemperature(int units /*= CELSIUS*/)
 {
   if (_revision == BOARD_REVISION_2) {
-    while(!iaqSensor->run()){ }
-    float reading = iaqSensor->temperature;
+    if(iaqSensor->run()){
+      mkr_iot_carrier_rev2::cache();
+    }
     if (units == FAHRENHEIT){
-      return (reading * 9.0 / 5.0) + 32.0;
+      return (mkr_iot_carrier_rev2::temperature * 9.0 / 5.0) + 32.0;
     } else {
-      return reading;
+      return mkr_iot_carrier_rev2::temperature;
     }
   }
   return HTS221->readTemperature(units);
@@ -116,9 +123,10 @@ float EnvClass::readTemperature(int units /*= CELSIUS*/)
 float EnvClass::readHumidity()
 {
   if (_revision == BOARD_REVISION_2) {
-    while(!iaqSensor->run()){ }
-    return iaqSensor->humidity;
-
+    if(iaqSensor->run()){
+      mkr_iot_carrier_rev2::cache();
+    }
+    return mkr_iot_carrier_rev2::humidity;
   }
   return HTS221->readHumidity();
 }

src/MKRIoTCarrierDefines.h

@@ -9,7 +9,7 @@
 //Sensor libraries
 #include <Arduino_APDS9960.h>   //Ambient light
 #include <Arduino_LPS22HB.h>    //Pressure sensor
-#include "bsec/bsec.h"
+#include "bsec.h"
 #include <Arduino_HTS221.h>     // env sensor
 #include <Arduino_LSM6DSOX.h>
 #include <Arduino_LSM6DS3.h>
@@ -62,8 +62,9 @@ namespace mkr_iot_carrier_rev1 {
     };
 };
 
-namespace mkr_iot_carrier_rev2 {
-    static Bsec *iaqSensor = nullptr;
+class mkr_iot_carrier_rev2 {
+public:
+    static Bsec *iaqSensor;
     enum relays {
         RELAY1 = 1,
         RELAY2 = 2,
@@ -83,8 +84,30 @@ namespace mkr_iot_carrier_rev2 {
         GROVE_AN1 = A0,
         GROVE_AN2 = A6,
     };
+    static void cache() {
+        breathVocEquivalent = iaqSensor->breathVocEquivalent;
+        gasResistance = iaqSensor->gasResistance;
+        iaq = iaqSensor->iaq;
+        iaqAccuracy = iaqSensor->iaqAccuracy;
+        staticIaq = iaqSensor->staticIaq;
+        co2Equivalent = iaqSensor->co2Equivalent;
+        temperature = iaqSensor->temperature;
+        pressure = iaqSensor->pressure;
+        humidity = iaqSensor->humidity;
+    };
+    static float breathVocEquivalent;
+    static float gasResistance;
+    static float iaq;
+    static float iaqAccuracy;
+    static float staticIaq;
+    static float co2Equivalent;
+    static float temperature;
+    static float pressure;
+    static float humidity;
 };
 
+extern mkr_iot_carrier_rev2 mkr_iot_carrier_rev2_instance;
+
 #define BME_SLAVE_ADDRESS   0x76
 
 #define LSM6DSOX_ADDRESS           0x6A