added docs for ESP8266 (D1 mini)

Author: sguter90

doc/Wiring.md

@@ -1,12 +1,14 @@
-# Connect ESP32 to BME680
+# Connect to BME680
 
 This sketch uses I2C for communication.   
 
-| BME680 | ESP32 |
-|--------|-------|
-| VCC    | 3V3   |
-| GND    | GND   |
-| SCL    | 22    |
-| SDA    | 21    |
+| BME680 | ESP8266 (D1 mini) | ESP32 |
+|--------|-------------------|-------|
+| VCC    | 3V3               | 3V3   |
+| GND    | GND               | GND   |
+| SCL    | D1                | 22    |
+| SDA    | D2                | 21    |
 
-![Wiring](images/wiring.jpg)
+![Wiring ESP8266 (D1 mini)](images/wiring_ESP8266_D1_mini.jpg)
+
+![Wiring ESP32](images/wiring_ESP32.jpg)