# A simple way to control relay

**URL:** <https://discourse.nodered.org/t/a-simple-way-to-control-relay/74336>\
**Category:** Hardware\
**Created:** [29 January 2023 08:09 UTC](https://discourse.nodered.org/t/a-simple-way-to-control-relay/74336 "2023-01-29T08:09:52Z")\
**Posts on this page:** 1\
**Showing post:** 4

<div class="post-metadata">

**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [29 January 2023 13:52 UTC](https://discourse.nodered.org/t/a-simple-way-to-control-relay/74336/4 "2023-01-29T13:52:21Z")

</div>

> [@TotallyInformation](#):
>
> > [@magicfire](#):
> >
> > What you really need is a mighty netGate [PN6400](http://www.chvda.com/magicfire/products/52426771.html)
> 
> Is this a sales pitch?

It seems to be.

Many of this users posts mention or link to this unit. Even the users avatar is a photo of the device  
 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/7/d/7d2641a3766a55a5cd144883bb80da30a15b2789.png)

- first post: [Recommendation for remote or wired digital I/O to combine with NR running on Raspberry Pi - #8 by magicfire](https://discourse.nodered.org/t/recommendation-for-remote-or-wired-digital-i-o-to-combine-with-nr-running-on-raspberry-pi/72463/8)
- next post ([OPC UA server giving “TypeError: Cannot read properties of undefined (reading ‘indexOf’)” - #3 by magicfire](https://discourse.nodered.org/t/opc-ua-server-giving-typeerror-cannot-read-properties-of-undefined-reading-indexof/73197/3)) is thinly veiled help about OPCUA but links to a doc with the title "畅维通达PN6400网关 ---用Node-RED搭建一个OPC UA服务器+客户端" (ENGLISH: Changwei Tongda PN6400 Gateway --- build an OPC UA server + client with Node-RED)
- Third post is around developing a node specifically for this PN6400 device.

---

_[View the full topic](https://discourse.nodered.org/t/a-simple-way-to-control-relay/74336)._