W5500 IO Library hanging (no PING) - using http and snmp server code

Question

We use an W5500 chip. We have software from the github: Wiznet/ioLibrary_Driver: ioLibrary_Driver can be used for the application design of WIZnet TCP/IP chips as W5500, W5300, W5200, W5100, W5100S, W6100, W6300. I blink a heartbeat LED in our main loop. It continues to operate, but sometimes the Ethernet stops responding to PINGs, or serving HTTP requests or SNMP requests. Our main loop is making calls to: httpServer_run(i); // Process HTTP requests on each socket snmpd_run(); Sometimes it can run overnight and still be responding. Other times, it stops -- no response from PING, etc. What code could I use to check for this? What is the process to detect, and reset the I/O to work again? Thank you.

Grace_Koo · Answer

You can refer to the following WIZnet official examples and adapt their structure and socket handling logic to your application: HTTP server example https://github.com/WIZnet-ioNIC/WIZnet-PICO-C/tree/main/examples/http/server SNTP example (periodic network communication and timeout handling) https://github.com/WIZnet-ioNIC/WIZnet-PICO-C/tree/main/examples/sntp These examples show how to structure the main loop, manage socket states, and handle periodic network tasks more robustly.