Features: 1. Based on the ESP32-WROOM-32 module, it supports wireless communication modes such as WIFI, Bluetooth and ESP-NOW. Onboard motor control interface can control 2 DC motors with encoder or 4 (two groups) DC motors without encoder 2. On-board bus steering gear control interface can control up to 253 ST3215 bus steering gear and obtain steering gear feedback. Onboard nine-axis IMU can obtain attitude and heading information at any time. 7~13V voltage input, can be directly powered by 2S or 3S lithium battery 3. With automatic download circuit, it is convenient to upload programs. Support input voltage and current detection. Onboard Micro-SD card slot. On-board laser-radar interface and integrated serial port to USB function. 4. I2C interface, which can be used to expand peripheral devices of other OLED, IMU and other I2C communication protocols. Multi-function expansion interface, which leads to the remaining interfaces for extending other functions, such as controlling steering gear or relay. 5. 40PIN extension interface, which can be used to connect the upper computer such as for raspberry pie, for Jetson Nano, for Sunrise X3 pie, communicate through serial port or I2C, and supply power to the upper computer. Specifications: Main control module: ESP32-WROOM-32 Main control chip: ESP32 Power supply voltage: DC 7~13V Power supply interface: XH2.54 Antenna interface: IPEX1 Download interface: Type-C Wireless communication mode: WIFI, Bluetooth, ESP-NOW Product size: 65 x 65mm Positioning hole spacing: 49 x 58mm Diameter of locating hole: 3mm Material: PCB+metal colour: black Package Contents: 2 x General Driver for Robots 2 x Screw package 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.