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src/controller.cc

@@ -80,7 +80,9 @@ int Controller::OpenI2C() {
   return i2c_fd;
 }
 
-
+/**
+ * \brief Initialize Temp/Humid/Pressure sensor
+ */
 void Controller::InitTempSensor(int i2c_fd) {
   bme280_settings settings;
   // Set indoor settings
@@ -107,10 +109,16 @@ void Controller::InitTempSensor(int i2c_fd) {
   SetAbsoluteHumidity();
 }
 
+/**
+ * \brief Initialize CO2 sensor
+ */
 void Controller::InitCO2Sensor() {
   this->mhz19b = new MHZ19B();
 }
 
+/**
+ * \brief Initialize fine dust sensor
+ */
 void Controller::InitDustSensor() {
   this->pmsa = new PMSA003();
   if(!pmsa->Init()) {
@@ -119,6 +127,9 @@ void Controller::InitDustSensor() {
   // Wait 30 secs from sleep mode, before stable
 }
 
+/**
+ * \brief Initialize TVOC Gas sensor
+ */
 void Controller::InitGasSensor(int i2c_fd) {
   this->sgp = new SGP30(i2c_fd);
   // Select the sensor on the bus
@@ -139,8 +150,13 @@ void Controller::InitGasSensor(int i2c_fd) {
   // TODO: first 20 seconds after init, returns fixed values (so should be ignored)
 }
 
+/**
+ * \brief Get a single temperature/humidity reading, calculate absolute humidity and store it
+ */
 void Controller::SetAbsoluteHumidity() {
-  // TODO: Select sensor on I2C bus?
+  if(!bme->Select()) {
+    throw std::runtime_error("Could not select the temp/humid/pressure sensor!\n");
+  }
 
   bme->SetSensorMode(BME280_FORCED_MODE);
   // 1/60Hz = 60000 ms
@@ -227,7 +243,7 @@ bool Controller::GasReading() {
   if(!sgp->Select()) {
     throw std::runtime_error("Could not select the gas sensor!\n");
   }
-  
+
   int counter = 0;
   while(counter < 40) {
     // Do measurement