The board uses 12c to connect to the OLED display via the SDA (D21/GPIO21) and SCL (D22/GPIO22) pins. The 12c address of the OLED display is 0x3co Module body ESP-WROOM-32 module, ESP32 0.96inch OLED board has all the functions of the traditional ESP32 Devkit V1 module, has exactly the same peripheral ports, seamlessly integrates with the 0.96-inch OLED display, the display has a high resolution of 128x64 and SSD1306 driver, and is compatible with the 12C interface. The module is the ESP-WROOM-32 development board 802.11b/g/WifFi+BT module; Low-power dual-core 32-bit CPU, can be used as an application processor; The main frequency is up to 240MHz, and the computing power is up to 600DMIPS; built-in 520KB SRAM; supports UART/SPI/I2C/PWM/DAC/ADC and other interfaces; supports openOcD debugging interface; Supports multiple sleep modes, and the current is as low as 6.5uA in deep sleep; embedded Lwip and FreeRTOS; Support STA/AP/STA+AP mode; Support Smart Config/AirKiss one-click network configuration; Universal AT commands, easy to use; Support local serial port upgrade and remote upgrade (FCT). Specification:Type C/Mini USB /Micro-USB Colour:Black Material:PCB+PVC Package Contents: 1 x ESP32 Development Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.