A I2C screen to show messages received from a client-browser.
Copy the ESP_Messenger into your Arduino IDE and save as a new file. Also copy the font.h file in the same folder.
Make sure you installed ARDUINO-ESP-IDE addon. https://github.com/sandeepmistry/esp8266-Arduino In the Arduino IDE you choose generic ESP module as boardtype it will compile without errors.
On start-up the local-IP is shown on the OLED. In your browser type the local-IP of the ESP server, it will open a simple page where you can submit a string of text. This text will be shown on the oled that is connected to the ESP.
Connections Oled - ESP8266:
Oled-SDA connected to GPIO0 of ESP
Oled-SCL connected to GPIO2 of ESP The I2C Oled board used has a SDD1306 controller. I did not (yet) test this sketch different controllers line SH1106.