The board uses I2C to connect to the OLED display via the SDA (D21/GPIO21) and SCL (D22/GPIO22) pins. The I2C address of the OLED display is 0x3C. Module body features the ESP-WROOM-32 module. The ESP32 0.96-inch OLED board includes all the functions of the traditional ESP32 Devkit V1 module, with identical peripheral ports. It seamlessly integrates with a 0.96-inch OLED display that has a resolution of 128x64 and built-in driver, compatible with the I2C interface. The module is an ESP-WROOM-32 development board. 802.11b/g/n Wi-Fi + Bluetooth module. Low-power dual-core 32-bit CPU, be used as an application processor. Main frequency up to 240MHz, computing power up to 600 DMIPS. Built-in 520KB SRAM. Supports UART, SPI, I2C, PWM, ADC and other interfaces. Supports OpenOCD debugging interface. Supports multiple sleep modes, with current as low as 6.5A in deep sleep. Embedded LwIP and FreeRTOS. Supports STA, AP, and STA+AP modes. Supports Smart Config and AirKiss one-touch network configuration. Standard AT commands for easy integration. Supports local serial upgrade and over-the-air remote upgrade. Specification: Mini USB Color: Black Material: PCB + PVC Package Contents: 1 x ESP32 Development Board Only the above package content is included; other items are not included. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement error allowed is +/- 1-3 cm.