# UART1 issues

**URL:** <https://forum.legato.io/t/uart1-issues/1982>\
**Category:** Legato Linux distribution (Yocto project)\
**Created:** [May 20, 2014, 3:37pm UTC](https://forum.legato.io/t/uart1-issues/1982 "2014-05-20T15:37:12Z")\
**Posts on this page:** 3\
**Page:** 2

<div class="post-metadata">

**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\
**Post date:** [March 17, 2022, 12:12pm UTC](https://forum.legato.io/t/uart1-issues/1982/21 "2022-03-17T12:12:33Z")

</div>

you can see here:

> **[WIKI : Sample apps with Modbus protocol over serial port](https://forum.mangoh.io/t/wiki-sample-apps-with-modbus-protocol-over-serial-port/1670/4)**
>
> Thank you Francis. I will try unsandboxing.

---

<div class="post-metadata">

**Author:** ![Kalai](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/kalai/32/1135_2.png) [@Kalai](https://forum.legato.io/u/Kalai)\
**Post date:** [April 7, 2023, 5:18pm UTC](https://forum.legato.io/t/uart1-issues/1982/22 "2023-04-07T17:18:12Z")

</div>

hi am trying to implement both the client and server modbus application in RTU mode, any one can guide or share the sample c program for the modbus implementation.

E.g, when client request the value from the particular reg, the server need to send the user defined value present in the reg.

---

<div class="post-metadata">

**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\
**Post date:** [April 8, 2023, 7:28am UTC](https://forum.legato.io/t/uart1-issues/1982/23 "2023-04-08T07:28:40Z")

</div>

does this help?

> <https://stackoverflow.com/questions/29602698/create-a-simple-client-server-using-modbus-in-c>

You can include the libmodbus in ./meta-swi/meta-swi-mdm9x28/recipes-core/images/mdm9x28-image.inc  
IMAGE\_INSTALL\_append = " libmodbus"

[Previous page](https://forum.legato.io/t/uart1-issues/1982.md?page=1)