LilyGO TTGO ESP8266 0.91 inch OLED SSD1306 Display (TTGO-ESP8266-0.91-SSD1306)
USB to Serial
|GPIO02||I2C SDA 1|
|GPIO14||I2C SCL 1|
Careful not to confuse this device with the Heltec WiFi Kit 8. The markings are identical but the GPIO assignments are different for the OLED. Heltec is a white circuit board with rounded edges. This one is black, has sharp edges and a prominent TTGO label at the top.