But breaking out the ESP8266’s I2C pins the pins that ESPEasy uses for software-emulated I2C turns this little “switch” into something much more useful — a wall-powered IoT sensor node in ...

The electronics are simple to the extreme, just hook the 4 wires of an 128×64 OLED I2C display to the appropriate pins of the ESP8266 board, and you’re ready to upload the Arduino code [David ...