# Error in UART communication between Uno & Nano

**URL:** <https://forum.xod.io/t/error-in-uart-communication-between-uno-nano/1024>\
**Category:** Uncategorized\
**Created:** [August 7, 2018, 4:41pm UTC](https://forum.xod.io/t/error-in-uart-communication-between-uno-nano/1024 "2018-08-07T16:41:16Z")\
**Posts on this page:** 6\
**Page:** 2

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**Author:** ![tobias](https://avatars.discourse-cdn.com/v4/letter/t/c67d28/32.png) [@tobias](https://forum.xod.io/u/tobias)\
**Post date:** [September 14, 2018, 7:54am UTC](https://forum.xod.io/t/error-in-uart-communication-between-uno-nano/1024/21 "2018-09-14T07:54:47Z")

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no worries about the “delay()” 😉  
I didn’t want to push you, was just curious and can totally understand that you concentrated on 0.24.

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**Author:** ![antonzlo](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.xod.io/antonzlo/32/461_2.png) [@antonzlo](https://forum.xod.io/u/antonzlo)\
**Post date:** [September 17, 2018, 11:17am UTC](https://forum.xod.io/t/error-in-uart-communication-between-uno-nano/1024/22 "2018-09-17T11:17:13Z")

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> <https://github.com/TasmanianDevilYouTube/Arduino/blob/master/SerialCommsTwoUnoWriteSoft/SerialCommsTwoUnoWriteSoft.ino>

  

> <https://github.com/TasmanianDevilYouTube/Arduino/blob/master/SerialCommsTwoUnoWrite/SerialCommsTwoUnoWrite.ino>

  
xod will try now in new version

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**Author:** ![s7ven](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.xod.io/s7ven/32/447_2.png) [@s7ven](https://forum.xod.io/u/s7ven)\
**Post date:** [September 18, 2018, 12:02am UTC](https://forum.xod.io/t/error-in-uart-communication-between-uno-nano/1024/23 "2018-09-18T00:02:18Z")

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![receive](https://canada1.discourse-cdn.com/flex027/uploads/xod/original/1X/3559dec80bb693f4eaaf7794c479144eea89637f.png)

Ok, so the first script is for Arduino to send bytes. Not sure what the second script is for?

Now for a simple XOD patch to check if anything is received. Just set the read-bytes patch to poll continuously.

You should be seeing 4Ch and 48h alternately in the watcher. You will also need to modify the soft-uart patch and swap the tx and rx arguments passed to \_serial. I mentioned that in a previous post.

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**Author:** ![nkrkv](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.xod.io/nkrkv/32/8_2.png) [@nkrkv](https://forum.xod.io/u/nkrkv)\
**Post date:** [September 21, 2018, 3:22pm UTC](https://forum.xod.io/t/error-in-uart-communication-between-uno-nano/1024/24 "2018-09-21T15:22:47Z")

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For anyone who’s interested in the UART topic, please note: [UART communication guide — review required](https://forum.xod.io/t/uart-communication-guide-review-required/1157)

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<div class="post-metadata">

**Author:** ![antonzlo](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.xod.io/antonzlo/32/461_2.png) [@antonzlo](https://forum.xod.io/u/antonzlo)\
**Post date:** [September 24, 2018, 12:43pm UTC](https://forum.xod.io/t/error-in-uart-communication-between-uno-nano/1024/25 "2018-09-24T12:43:17Z")

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Received new Nano, will now test

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<div class="post-metadata">

**Author:** ![antonzlo](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.xod.io/antonzlo/32/461_2.png) [@antonzlo](https://forum.xod.io/u/antonzlo)\
**Post date:** [September 24, 2018, 7:01pm UTC](https://forum.xod.io/t/error-in-uart-communication-between-uno-nano/1024/26 "2018-09-24T19:01:38Z")

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nothing good…  
will try to follow guide

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