# Many Arduinos on serial ports with node-red (raspberry pi 4)

**URL:** <https://discourse.nodered.org/t/many-arduinos-on-serial-ports-with-node-red-raspberry-pi-4/38725>\
**Category:** General\
**Created:** [7 January 2021 15:57 UTC](https://discourse.nodered.org/t/many-arduinos-on-serial-ports-with-node-red-raspberry-pi-4/38725 "2021-01-07T15:57:07Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![niwre001](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/niwre001/32/34929_2.png) [@niwre001](https://discourse.nodered.org/u/niwre001)\
**Post date:** [7 January 2021 15:57 UTC](https://discourse.nodered.org/t/many-arduinos-on-serial-ports-with-node-red-raspberry-pi-4/38725/1 "2021-01-07T15:57:07Z")

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Hi there,  
have several Ardinos in different places and would like e.g. temp values ​​on node-red to each  
created serial interfaces (/dev/ttyUSB0). How should I configure the serial interfaces in node-red.

Kind regards  
Max

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<div class="post-metadata">

**Author:** ![TotallyInformation](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/totallyinformation/32/31_2.png) [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)\
**Post date:** [7 January 2021 20:34 UTC](https://discourse.nodered.org/t/many-arduinos-on-serial-ports-with-node-red-raspberry-pi-4/38725/3 "2021-01-07T20:34:10Z")

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How have you configured the Arduindo's serial interfaces? The Node-RED settings should match.

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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:** [8 March 2021 20:34 UTC](https://discourse.nodered.org/t/many-arduinos-on-serial-ports-with-node-red-raspberry-pi-4/38725/4 "2021-03-08T20:34:28Z")

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