# Problems Node Arduino

**URL:** <https://discourse.nodered.org/t/problems-node-arduino/60201>\
**Category:** General\
**Created:** [22 March 2022 15:11 UTC](https://discourse.nodered.org/t/problems-node-arduino/60201 "2022-03-22T15:11:47Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![alessandro](https://avatars.discourse-cdn.com/v4/letter/a/ac91a4/32.png) [@alessandro](https://discourse.nodered.org/u/alessandro)\
**Post date:** [22 March 2022 15:11 UTC](https://discourse.nodered.org/t/problems-node-arduino/60201/1 "2022-03-22T15:11:47Z")

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Hi, I'm new here and I have a problem with the Arduino node. When sending data from node-red to Arduino, the number -1 always arrives in Arduino, while sending data (of any type) from Arduino to node-red the node is always trying to connect and nothing happens. I tried to use the serial nodes that before downloading the Arduino nodes worked but make the connection but it doesn't works. What is the procedure? Thanks  
Attualmente utilizzo node-red v.1.0.6 e node.js v.10.21.0

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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:** [22 March 2022 17:49 UTC](https://discourse.nodered.org/t/problems-node-arduino/60201/2 "2022-03-22T17:49:55Z")

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serial ports don't like being shared. You probably can't have both a serialport and arduino node both pointed at the same arduino port... (and also ensure that the arduino ide isn't running at the same time)

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**Author:** ![alessandro](https://avatars.discourse-cdn.com/v4/letter/a/ac91a4/32.png) [@alessandro](https://discourse.nodered.org/u/alessandro)\
**Post date:** [24 March 2022 07:35 UTC](https://discourse.nodered.org/t/problems-node-arduino/60201/3 "2022-03-24T07:35:14Z")

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Yes i just tried. I tried with arduino node and only after deleted arduino node e tried with serial node. Arduino ide isn't running

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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:** [23 May 2022 07:35 UTC](https://discourse.nodered.org/t/problems-node-arduino/60201/4 "2022-05-23T07:35:22Z")

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