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+--- Thread: DHCP cant get an IP address (/showthread.php?tid=5411)
DHCP cant get an IP address - jhom - 03-26-2024
Good day I hope you can help me with my problem. I have tried to make my own rs485 circuit with the help of your KC868-A8M schematic diagram. I fabricate it on PCBWAY and also let then assemble it I will make a list of what I did and problem/s I encountered on making the LAN/DHCP work. and I have attached my schematic diagram that I made on EASYEDA and also the pcb design if it might help.
-Things I have done:
1. I copied https://www.kincony.com/forum/showthread.php?tid=2801 arduino code for LAN_8720 on my arduino ide when I use static IP it successfully gets an IP but I cant ping it but when I use DHCP I am stuck on "etch is connected" but cant get an IP at all. I have checked my ip pool and I still have IP addresses available.
2. I have tried reheating/reflowing the lan8720 it also didnt work.
3. I have updated my libraries it also did not helped.
4. What makes me confuse a lot more was, I was able to get an IP on some of the PCB but after a while it cant connect anymore some of the pcb also cant connect from the start.
5. Every other parts was working fine my only problem was the LAN8720, I used LAN8720AI-CP for the IC and suppliers part on lcsc.com is C633282.