Node Red on raspberry PI doesn't send UDP packets, but DOES receive them

General
1

Running UDP communication with three devices on my WiFi network:

  • raspberry PI (using the "UDP send" and "UDP receive" nodes)
  • ESP32
  • My desktop computer running packet sender and Wireshark

When I send a UDP packet from packet sender to the raspberry PI, I see it in Node Red (using the debug node). All is well!

When I try to send a UDP packet from the Raspberry Pi in node red, nothing happens. I don't get any errors, but Wireshark shows no UDP traffic (nothing was sent). I have also tried to send a UDP packet using a basic Python script on the Pi, and I get the same result (no errors, but no UDP network traffic sent).

Is there something I should be enabling for sending UDP packets on the Pi?

2

Where did you run wireshark? On the same device or the destination?

Show us how you have set up UDP node and how you monitor with wireshark including any filters.

3

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