Merge pull request #8 from awatterott/add-temperature

Add temperature reading

Author: aentinger

examples/ReadPressure/ReadPressure.ino

@@ -2,8 +2,8 @@
   LPS22HB - Read Pressure
 
   This example reads data from the on-board LPS22HB sensor of the
-  Nano 33 BLE Sense and prints the pressure sensor value to the
-  Serial Monitor once a second.
+  Nano 33 BLE Sense and prints the temperature and pressure sensor
+  value to the Serial Monitor once a second.
 
   The circuit:
   - Arduino Nano 33 BLE Sense
@@ -32,6 +32,13 @@ void loop() {
   Serial.print(pressure);
   Serial.println(" kPa");
 
+  float temperature = BARO.readTemperature();
+
+  // print the sensor value
+  Serial.print("Temperature = ");
+  Serial.print(temperature);
+  Serial.println(" C");
+
   // print an empty line
   Serial.println();
 

examples/ReadPressureImperial/ReadPressureImperial.ino

@@ -2,8 +2,8 @@
   LPS22HB - Read Pressure Imperial
 
   This example reads data from the on-board LPS22HB sensor of the
-  Nano 33 BLE Sense and prints the pressure sensor value in imperial
-  units to the Serial Monitor once a second.
+  Nano 33 BLE Sense and prints the temperature and pressure sensor
+  value in imperial units to the Serial Monitor once a second.
 
   The circuit:
   - Arduino Nano 33 BLE Sense
@@ -33,6 +33,13 @@ void loop() {
   Serial.print(pressure);
   Serial.println(" psi");
 
+  float temperature = BARO.readTemperature();
+
+  // print the sensor value
+  Serial.print("Temperature = ");
+  Serial.print(temperature);
+  Serial.println(" C");
+
   // print an empty line
   Serial.println();
 

src/BARO.cpp

@@ -29,6 +29,8 @@
 #define LPS22HB_PRESS_OUT_XL_REG    0x28
 #define LPS22HB_PRESS_OUT_L_REG     0x29
 #define LPS22HB_PRESS_OUT_H_REG     0x2a
+#define LPS22HB_TEMP_OUT_L_REG      0x2b
+#define LPS22HB_TEMP_OUT_H_REG      0x2c
 
 LPS22HBClass::LPS22HBClass(TwoWire& wire) :
   _wire(&wire),
@@ -81,6 +83,14 @@ float LPS22HBClass::readPressure(int units)
   return 0;
 }
 
+float LPS22HBClass::readTemperature(void)
+{
+  float reading = (i2cRead(LPS22HB_TEMP_OUT_L_REG) << 0) | 
+          (i2cRead(LPS22HB_TEMP_OUT_H_REG) << 8);
+
+  return reading/100;
+}
+
 int LPS22HBClass::i2cRead(uint8_t reg)
 {
   _wire->beginTransmission(LPS22HB_ADDRESS);

src/BARO.h

@@ -37,6 +37,7 @@ class LPS22HBClass {
   void end();
 
   float readPressure(int units = KILOPASCAL);
+  float readTemperature(void);
 
 private:
   int i2cRead(uint8_t reg);