ESP32 pinging over Ethernet but otherwise not operational

mpulis
Posts: 57
Joined: Mon Aug 07, 2017 7:53 am

ESP32 pinging over Ethernet but otherwise not operational

Postby mpulis » Thu Sep 23, 2021 9:07 am

Hi all,

I'm experiencing a very weird issue at the moment. I have multiple devices on the field connected to a TCP/IP network using Ethernet (we're using the LAN8720 chip). After a while, some devices stop communicating over TCP/IP (can't open a TCP/IP connection to the TCP Servers set up on them), but I can still ping them. This appears to happen randomly to various devices.

I've setup the task watchdogs and the RTC watchdog timer with a full system reset, but this doesn't seem to have solved the issue. Now, it appears that the on-site technicians had first connected the devices to a Passive-POE enabled switch (our devices do not support POE), but then disabled POE on the switch. Do you believe that this could be causing the issue?

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