Select sensor during reading

src/controller.cc

@@ -121,7 +121,6 @@ void Controller::InitDustSensor() {
 
 void Controller::InitGasSensor(int i2c_fd) {
   this->sgp = new SGP30(i2c_fd);
-
   // Select the sensor on the bus
   if(!sgp->Select()) {
     throw std::runtime_error("Could not select the gas sensor!\n");
@@ -158,6 +157,9 @@ void Controller::SetAbsoluteHumidity() {
  * \return true if everything went successfully
  */
 bool Controller::TempHumidPressReading() {
+  if(!bme->Select()) {
+    throw std::runtime_error("Could not select the temp/humid/pressure sensor!\n");
+  }
 
   int counter = 0;
   while(counter < 60) {
@@ -222,7 +224,10 @@ bool Controller::DustReading() {
 bool Controller::GasReading() {
   // IMPORTANT: According to the specs we need to sent regular internals of 1s to ensure proper dynamic baseline compensation algo.
   // This time interval needs to be done forever.
-
+  if(!sgp->Select()) {
+    throw std::runtime_error("Could not select the gas sensor!\n");
+  }
+  
   int counter = 0;
   while(counter < 40) {
     // Do measurement
@@ -232,7 +237,6 @@ bool Controller::GasReading() {
     }
 
     printf("TVOC : %dppb\n", sgp->TVOC);
-    printf("eCO2 : %dppm\n", sgp->eCO2);
 
     // Sleep 1 second
     // TODO: embedded a delay within DoMeasurement()?