chip board ENC28J60-I/SO.the board 25MHZ crystal. interface board HR911105A.3.3 V power supply pin.PCB size: 63x18x15mmPositioning hole diameter: 3.1mmWeight: about 17gPCB with Ethernet connector: 67x18x17 mmPCB bottom pins: 9.5mmCompatible with Nano Ethernet driver: ENC28J60Colour:As ShownMaterial:PCBDebug reminder:1, the IP address of the computer to a network segment and module such as IP module 192.168.1.2, IP computer set: 192.168.1.3; 192.168.1 is the 3 section;2, cable connected to the mouth of the computer network module and mouth; (that is, the cable network 1 3,2 , and then do not understand that there are pictures Baidu);3, the module and the MCU connection should pay attention to the connection of each line is reliable (the is not even connected to the good);4, and the MCU port IO to confirm that is right;5, the program recompile, download, confirm whether to download! STM32 and 51 IODue to different batches, there may be differences in product appearance and printed text, which not affect usePackage Contents:1 * for Nano boardOnly 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.