# UDP - Out / In Functionality

**URL:** <https://discourse.nodered.org/t/udp-out-in-functionality/10670>\
**Category:** General\
**Created:** [30 April 2019 09:18 UTC](https://discourse.nodered.org/t/udp-out-in-functionality/10670 "2019-04-30T09:18:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Manfred](https://avatars.discourse-cdn.com/v4/letter/m/0ea827/32.png) [@Manfred](https://discourse.nodered.org/u/Manfred)\
**Post date:** [30 April 2019 09:18 UTC](https://discourse.nodered.org/t/udp-out-in-functionality/10670/1 "2019-04-30T09:18:36Z")

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Hello Guys

I wonder, if there exits a node, that is able to send UDP - Messages with local port set to auto AND receive some kind of answer on the same port. ( simple send / receive UDP - Socket )  
If using an UDP - In and UDP - Out Node, both have to bound on the same port and that on most devices fails with "udp: port already in use" !  
Or maybe there is another way to solve this ?

Thanks a lot  
Manfred

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**Author:** ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)\
**Post date:** [30 April 2019 12:38 UTC](https://discourse.nodered.org/t/udp-out-in-functionality/10670/2 "2019-04-30T12:38:28Z")

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which version of Node-RED are you using ? on which OS/platform ?  
It should be possible to make work, though I know there are some outstanding timing issues we have on some devices.