# Modbus RTU nodes with DE and RE control

**URL:** <https://discourse.nodered.org/t/modbus-rtu-nodes-with-de-and-re-control/48319>\
**Category:** Industrial\
**Created:** [12 July 2021 13:56 UTC](https://discourse.nodered.org/t/modbus-rtu-nodes-with-de-and-re-control/48319 "2021-07-12T13:56:45Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![quemf](https://avatars.discourse-cdn.com/v4/letter/q/97f17d/32.png) [@quemf](https://discourse.nodered.org/u/quemf)\
**Post date:** [12 July 2021 13:56 UTC](https://discourse.nodered.org/t/modbus-rtu-nodes-with-de-and-re-control/48319/1 "2021-07-12T13:56:45Z")

</div>

Hi everyone,

I am trying to communicate between an Arduino Leonardo based PLC: [https://www.industrialshields.com/web/content?model=ir.attachment&field=datas&id=262929&](https://www.industrialshields.com/web/content?model=ir.attachment&field=datas&id=262929&) and a Raspberry based PLC: [https://www.industrialshields.com/web/content?model=ir.attachment&field=datas&id=137792&](https://www.industrialshields.com/web/content?model=ir.attachment&field=datas&id=137792&) through Modbus RTU RS-485.

The fact is that the Touchberry Pi internally needs to control the DE and RE pins for Rs-485.

Does anyone know any Modbus nodes to control DE and RE pins? I tried some but I do not think they can do it

Thank you very much,

Q.

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [10 September 2021 13:57 UTC](https://discourse.nodered.org/t/modbus-rtu-nodes-with-de-and-re-control/48319/2 "2021-09-10T13:57:30Z")

</div>

This topic was automatically closed 60 days after the last reply. New replies are no longer allowed.