Init commit with many years of arduino sketches and projects. I dont know if the esp8266 includes much, but there are also libraries. I hope they dont have crazy automatic versioning through the Arduino IDE.

libraries/NewliquidCrystal/thirdparty libraries/SoftI2CMaster/examples/MLX90614Soft/MLX90614Soft.ino

@@ -0,0 +1,60 @@
+// reads out the MLX90614 infrared thermometer
+
+#include <Arduino.h>
+#define SDA_PORT PORTD
+#define SDA_PIN 3
+#define SCL_PORT PORTD
+#define SCL_PIN 5
+#include <SoftI2CMaster.h>
+
+
+
+#define DEVICE (0x5A<<1)
+
+
+
+void setup(){
+#if (__AVR_ARCH__  == 5) // means ATMEGA 
+	Serial.begin(19200);
+	Serial.println("Setup...");
+#endif
+	i2c_init();
+}
+
+void loop(){
+    int dev = 0x5A<<1;
+    int data_low = 0;
+    int data_high = 0;
+    int pec = 0;
+    
+    i2c_start(dev+I2C_WRITE);
+    i2c_write(0x07);
+    // read
+    i2c_rep_start(dev+I2C_READ);
+    data_low = i2c_read(false); //Read 1 byte and then send ack
+    data_high = i2c_read(false); //Read 1 byte and then send ack
+    pec = i2c_read(true);
+    i2c_stop();
+    
+    //This converts high and low bytes together and processes temperature, MSB is a error bit and is ignored for temps
+    double tempFactor = 0.02; // 0.02 degrees per LSB (measurement resolution of the MLX90614)
+    double tempData = 0x0000; // zero out the data
+    int frac; // data past the decimal point
+    
+    // This masks off the error bit of the high byte, then moves it left 8 bits and adds the low byte.
+    tempData = (double)(((data_high & 0x007F) << 8) + data_low);
+    tempData = (tempData * tempFactor)-0.01;
+    
+    float celcius = tempData - 273.15;
+    float fahrenheit = (celcius*1.8) + 32;
+
+#if (__AVR_ARCH__  == 5) // means ATMEGA 
+    Serial.print("Celcius: ");
+    Serial.println(celcius);
+
+    Serial.print("Fahrenheit: ");
+    Serial.println(fahrenheit);
+#endif
+
+    delay(1000); // wait a second before printing again
+}