# UART missing data on ConnectCore 6UL

**URL:** <https://forums.digi.com/t/uart-missing-data-on-connectcore-6ul/21856>\
**Category:** Linux\
**Tags:** uart, cc6ul-sbc, 8ul\
**Created:** [October 5, 2020, 8:32am UTC](https://forums.digi.com/t/uart-missing-data-on-connectcore-6ul/21856 "2020-10-05T08:32:10Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![anupam\_mz](https://avatars.discourse-cdn.com/v4/letter/a/f04885/32.png) [@anupam\_mz](https://forums.digi.com/u/anupam_mz)\
**Post date:** [October 5, 2020, 8:32am UTC](https://forums.digi.com/t/uart-missing-data-on-connectcore-6ul/21856/1 "2020-10-05T08:32:10Z")

</div>

I am trying to send data over UART to ConnectCore 6UL module from my Windows machine. I am using the console port (UART5) on 6UL.

Here is the python code I use on my windows machine to send data:

import serial

comm = serial.Serial(port=“COM3”, baudrate=115200, parity=serial.PARITY\_NONE, stopbits=serial.STOPBITS\_ONE, bytesize=serial.EIGHTBITS)

alpha = b"abcdefghijklmnopqrstuvwxyz"

comm.write(alpha)

comm.close()

On my 6UL, I simply use the following command to receive all the data from UART:  
cat /dev/ttymxc4

Sometimes I receive correctly all the data, but most of the times I lose data partially.

Thanks.

---

<div class="post-metadata">

**Author:** ![LeonidM](https://avatars.discourse-cdn.com/v4/letter/l/d26b3c/32.png) [@LeonidM](https://forums.digi.com/u/LeonidM)\
**Post date:** [October 8, 2020, 3:23pm UTC](https://forums.digi.com/t/uart-missing-data-on-connectcore-6ul/21856/2 "2020-10-08T15:23:17Z")

</div>

this is being addressed via support case