# 3 Serials Ports in Node red with proteus

**URL:** <https://discourse.nodered.org/t/3-serials-ports-in-node-red-with-proteus/96920>\
**Category:** Dashboard\
**Tags:** node-red-dashboard\
**Created:** [6 May 2025 11:10 UTC](https://discourse.nodered.org/t/3-serials-ports-in-node-red-with-proteus/96920 "2025-05-06T11:10:39Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![andersonmario](https://avatars.discourse-cdn.com/v4/letter/a/779978/32.png) [@andersonmario](https://discourse.nodered.org/u/andersonmario)\
**Post date:** [6 May 2025 11:10 UTC](https://discourse.nodered.org/t/3-serials-ports-in-node-red-with-proteus/96920/1 "2025-05-06T11:10:39Z")

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Hello, I’m having difficulties transmitting data via the serial port from Proteus to Node-RED. I can only use one port — when I try to use all three, it doesn’t work correctly and only one port works properly. But I need to use three ports because I’m using three Arduinos in Proteus.

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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:** [5 June 2025 11:11 UTC](https://discourse.nodered.org/t/3-serials-ports-in-node-red-with-proteus/96920/2 "2025-06-05T11:11:31Z")

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