The board uses 12c to connect to the OLED display via the SDA (D21 or GPIO21) and SCL (D22 or 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 driver, and is compatible with the 12C interface. The module is the ESP-WROOM-32 development board 802.11b or g or WifFiandBT 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 supports UART or SPI or I2C or PWM or or 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 or AP or STAandAP mode Support Smart Config or AirKiss one-click network configuration Universal AT commands, easy to use Support local serial port upgrade and remote upgrade (FCT). Specification:Mini USB Colour:Black Material:PCBandPVC 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.