chip board ENC28J60-I/SO. the board 25MHZ crystal. interface board HR911105A. 3.3 V power supply pin. PCB size: 63x18x15mm Positioning hole diameter: 3.1mm Weight: about 17g PCB with Ethernet connector: 67x18x17 mm PCB bottom pins: 9.5mm Compatible with Nano Ethernet driver: ENC28J60 Colour: As Shown Material: PCB Debug reminder: 1. Set the IP address of the computer to the same network segment as the module, for example, if module IP is 192.168.1.2, set computer IP to 192.168.1.3; 192.168.1 is the third section; 2. Connect the cable between the computer network port and the module port; 3. When connecting the module to the MCU, ensure all wiring connections are secure and properly connected; 4. Confirm the MCU port IO connections are correct; 5. Recompile and download the program, and confirm the download is successful! STM32 and 51 IO Due to different batches, there may be differences in product appearance and printed text, which do not affect use Package Contents: 1 x for Nano 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 to be slightly different from the real thing. The measurement allowed error is +/- 1-3cm.