added imperial quantities support

Added support for imperial quanties for pressure and IMU sensor

Author: Rocketct

src/EnvClass.cpp

@@ -102,7 +102,13 @@ float EnvClass::readTemperature(int units /*= CELSIUS*/)
 {
   if (_revision == BOARD_REVISION_2) {
     while(!iaqSensor->run()){ }
-    return iaqSensor->temperature;
+    float reading = iaqSensor->temperature;
+    if (units == FAHRENHEIT){
+      reading = iaqSensor->temperature;
+      return (reading * 9.0 / 5.0) + 32.0;
+    } else {
+      return reading;
+    }
   }
   return HTS221->readTemperature(units);
 }

src/PressureClass.cpp

@@ -101,16 +101,29 @@ float PressureClass::readPressure(int units)
 {
   if (_revision == BOARD_REVISION_2) {
     while(!iaqSensor->run()){ }
-    return iaqSensor->pressure/1000;
+    float reading = iaqSensor->pressure/1000;
+    if (units == MILLIBAR) { // 1 kPa = 10 millibar
+      return reading * 10;
+    } else if (units == PSI) {  // 1 kPa = 0.145038 PSI
+      return reading * 0.145038;
+    } else {
+      return reading;
+    }
   }
   return LPS22HB->readPressure(units);
 }
 
-float PressureClass::readTemperature()
+float PressureClass::readTemperature(int units /*= CELSIUS*/)
 {
   if (_revision == BOARD_REVISION_2) {
     while(!iaqSensor->run()){}
-    return iaqSensor->temperature;
+    float reading = iaqSensor->temperature;
+    if (units == FAHRENHEIT){
+      reading = iaqSensor->temperature;
+      return (reading * 9.0 / 5.0) + 32.0;
+    } else {
+      return reading;
+    }
   }
   return LPS22HB->readTemperature();
 }

src/PressureClass.h

@@ -13,7 +13,7 @@ class PressureClass {
     void end();
 
     float readPressure(int units = KILOPASCAL);
-    float readTemperature(void);
+    float readTemperature(int units = CELSIUS);
 
   private:
   // Helper functions declarations