Hello. I am working on an IoT device based on an Adafruit Feather with a Wiznet W5500 Ethernet breakout board. It is running an SNTP client that only gets a response for its first request. I am trying to use Wireshark to figure out what is going on but am not getting any output related to the device.
I have tried:
- port 123 capture filter
- ip.host display filter
- ethernet filters
The port 123 filter did capture an NTP request/response from my Mac.
Environment:
- MacPro, MacOS 15.5
- Wireshark 4.6.4
- The Mac and the Feather are plugged into the same Ethernet switch
Note that Wireshark does not capture either the request or the response for the first request.
I know that the W5500 is functional because I do get a response first request and at startup the device also makes an HTTP request and gets and displays the response as expected.
TIA, D.