W5500 and matter protocol are not compatible?

Question

Hi, I'm using W5500 with esp32 (IDE Arduino, ethernet library) and matter library on my iot device. The commissioning with Home Assistant is ok, i can manage my device normally. Also after poweroff-poweron for a few seconds the device is available on Home Assistant. But if i poweroff the device for over 2 minutes and Home Assistant detect the device as unavailable, after poweron the device don't reconnect to Home Assistant. I must decommission and recommission the device if i want to see it on Home Assistant. From Home Assistant, the device responds to ping even if it is not visible via matter. If i use wifi instead W5500 ethernet shield, the device reconnect normally and the problem does not occur. Does anyone know of any bugs on the w5500 and Matter? Thanks

Hannah · Answer

Hello, I’m not a Matter expert, so my answer may be limited. However, based on the AI’s suggestions, I recommend checking the following areas that often cause issues: Use Wireshark capture to verify whether the device is actually sending mDNS/DNS-SD advertisements after boot. Check the DHCP/IPv6 state. Note the difference compared to Wi-Fi: Wi-Fi stacks usually handle IP renewals and service re-announcements automatically, but with the W5500 this must be handled explicitly in the MCU firmware. Confirming these two points first should help narrow down the root cause.