Add readIlluminance() API to replace readLux()

examples/ReadSensors/ReadSensors.ino

@@ -28,7 +28,7 @@ void loop() {
   float temperature = ENV.readTemperature();
   float humidity    = ENV.readHumidity();
   float pressure    = ENV.readPressure();
-  float lux         = ENV.readLux();
+  float illuminance = ENV.readIlluminance();
   float uva         = ENV.readUVA();
   float uvb         = ENV.readUVB();
   float uvIndex     = ENV.readUVIndex();
@@ -46,8 +46,9 @@ void loop() {
   Serial.print(pressure);
   Serial.println(" kPa");
 
-  Serial.print("Lux .       = ");
-  Serial.println(lux);
+  Serial.print("Illuminance = ");
+  Serial.print(illuminance);
+  Serial.println(" lx");
 
   Serial.print("UVA         = ");
   Serial.println(uva);

keywords.txt

@@ -18,7 +18,7 @@ end	KEYWORD2
 readTemperature	KEYWORD2
 readHumidity	KEYWORD2
 readPressure	KEYWORD2
-readLux	KEYWORD2
+readIlluminance	KEYWORD2
 readUVA	KEYWORD2
 readUVB	KEYWORD2
 readUVIndex	KEYWORD2

src/MKRENV.cpp

@@ -157,7 +157,7 @@ float ENVClass::readPressure()
           (i2cRead(LPS22HB_ADDRESS, LPS22HB_PRESS_OUT_H_REG) << 16)) / 40960.0;
 }
 
-float ENVClass::readLux()
+float ENVClass::readIlluminance()
 {
   // read analog value and convert to mV
   float mV = (analogRead(_lightSensorPin) * 3300.0) / 1023.0;

src/MKRENV.h

@@ -34,11 +34,14 @@ class ENVClass {
   float readTemperature();
   float readHumidity();
   float readPressure();
-  float readLux();
+  float readIlluminance();
   float readUVA();
   float readUVB();
   float readUVIndex();
 
+  // deprecated, use readIlluminance() instead
+  float readLux() { return readIlluminance(); }
+
 private:
   int i2cRead(uint8_t address, uint8_t reg);
   int i2cRead16(uint8_t address, uint8_t reg) {