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

**URL:** <https://discourse.nodered.org/t/node-red-on-raspberry-pi-doesnt-send-udp-packets-but-does-receive-them/89456>\
**Category:** General\
**Tags:** udp\
**Created:** [13 July 2024 00:22 UTC](https://discourse.nodered.org/t/node-red-on-raspberry-pi-doesnt-send-udp-packets-but-does-receive-them/89456 "2024-07-13T00:22:00Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![rt54321](https://avatars.discourse-cdn.com/v4/letter/r/977dab/32.png) [@rt54321](https://discourse.nodered.org/u/rt54321)\
**Post date:** [13 July 2024 00:22 UTC](https://discourse.nodered.org/t/node-red-on-raspberry-pi-doesnt-send-udp-packets-but-does-receive-them/89456/1 "2024-07-13T00:22:01Z")

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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?

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**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [13 July 2024 05:59 UTC](https://discourse.nodered.org/t/node-red-on-raspberry-pi-doesnt-send-udp-packets-but-does-receive-them/89456/2 "2024-07-13T05:59:55Z")

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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.

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [11 October 2024 06:00 UTC](https://discourse.nodered.org/t/node-red-on-raspberry-pi-doesnt-send-udp-packets-but-does-receive-them/89456/3 "2024-10-11T06:00:03Z")

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