Examples update for emissivity

examples/mlx_set_emissivity/mlx_set_emissivity.ino

@@ -0,0 +1,47 @@
+/*
+ * See app note:
+ * https://www.melexis.com/en/documents/documentation/application-notes/application-note-mlx90614-changing-emissivity-setting
+ *
+ * 1. Write 0x0000 to address 0x04 (erase the EEPROM cell)
+ * 2. Write the new value to address 0x04
+ * 3. Read the value in address 0x04 in order to check that the correct value is stored
+ * 4. Restart the module
+ *
+ */
+
+#include <Adafruit_MLX90614.h>
+
+//== CHANGE THIS ============
+double new_emissivity = 0.95;
+//===========================
+
+Adafruit_MLX90614 mlx = Adafruit_MLX90614();
+
+void setup() {
+  Serial.begin(9600);
+  while (!Serial);
+
+  Serial.println("Adafruit MLX90614 Emissivity Setter.\n");
+
+  // init sensor
+  if (!mlx.begin()) {
+    Serial.println("Error connecting to MLX sensor. Check wiring.");
+    while (1);
+  };
+
+  // read current emissivity
+  Serial.print("Current emissivity = "); Serial.println(mlx.readEmissivity());
+
+  // set new emissivity
+  Serial.print("Setting emissivity = "); Serial.println(new_emissivity);
+  mlx.writeEmissivity(new_emissivity); // this does the 0x0000 erase write
+
+  // read back
+  Serial.print("New emissivity = "); Serial.println(mlx.readEmissivity());
+
+  // done
+  Serial.print("DONE. Restart the module.");
+}
+
+void loop() {
+}

examples/mlxtest/mlxtest.ino

@@ -22,13 +22,17 @@ Adafruit_MLX90614 mlx = Adafruit_MLX90614();
 
 void setup() {
   Serial.begin(9600);
+  while (!Serial);
 
   Serial.println("Adafruit MLX90614 test");
 
   if (!mlx.begin()) {
     Serial.println("Error connecting to MLX sensor. Check wiring.");
     while (1);
   };
+
+  Serial.print("Emissivity = "); Serial.println(mlx.readEmissivity());
+  Serial.println("================================================");
 }
 
 void loop() {