# Sequent microsystems relay hat

**URL:** <https://discourse.nodered.org/t/sequent-microsystems-relay-hat/31605>\
**Category:** General\
**Created:** [16 August 2020 13:23 UTC](https://discourse.nodered.org/t/sequent-microsystems-relay-hat/31605 "2020-08-16T13:23:57Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![m0bpq](https://avatars.discourse-cdn.com/v4/letter/m/b38774/32.png) [@m0bpq](https://discourse.nodered.org/u/m0bpq)\
**Post date:** [16 August 2020 13:23 UTC](https://discourse.nodered.org/t/sequent-microsystems-relay-hat/31605/1 "2020-08-16T13:23:58Z")

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Hi everyone,

I am considering node-red to control some relays ([https://sequentmicrosystems.com/index.php?route=product/product&product\_id=50](https://sequentmicrosystems.com/index.php?route=product/product&product_id=50)) attached to a raspi to provide a browser based UI.

I have an awful lot to learn, so I wonder if there is an existing project that uses i2c is available that I can look at for inspiration?

Thanks  
Steve

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**Author:** ![zenofmud](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/zenofmud/32/316_2.png) [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Post date:** [16 August 2020 16:55 UTC](https://discourse.nodered.org/t/sequent-microsystems-relay-hat/31605/2 "2020-08-16T16:55:47Z")

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Have you done a forum search using `i2c` as the search term?

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**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [16 August 2020 20:39 UTC](https://discourse.nodered.org/t/sequent-microsystems-relay-hat/31605/3 "2020-08-16T20:39:34Z")

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Do you particularly want to use that card? There are others that connect direct to GPIO lines that are very easy to interface with, but have the disadvantage of a much more limited number of relays and other devices that can be attached. If you only need eight, however, then I suggest considering one of those.

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**Author:** ![m0bpq](https://avatars.discourse-cdn.com/v4/letter/m/b38774/32.png) [@m0bpq](https://discourse.nodered.org/u/m0bpq)\
**Post date:** [16 August 2020 21:01 UTC](https://discourse.nodered.org/t/sequent-microsystems-relay-hat/31605/4 "2020-08-16T21:01:36Z")

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Thanks Colin - yes I need at least 16 relays for my basic automation project, and when I get greedy will want more, so this card seems to be just the ticket!

Cheers  
Steve

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**Author:** ![juntiedt](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/juntiedt/32/58357_2.png) [@juntiedt](https://discourse.nodered.org/u/juntiedt)\
**Post date:** [24 August 2020 11:58 UTC](https://discourse.nodered.org/t/sequent-microsystems-relay-hat/31605/5 "2020-08-24T11:58:34Z")

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[8relay flow.txt](https://discourse.nodered.org/uploads/short-url/kvpO6TIWUdTLgjVTvAuWrTv8ZOd.txt) (32.6 KB)

please find attached my 8relay flow. Can easily be extended to more than 8 relays.  
In order to use the flow please install program from Sequent microsystem github.

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**Author:** ![m0bpq](https://avatars.discourse-cdn.com/v4/letter/m/b38774/32.png) [@m0bpq](https://discourse.nodered.org/u/m0bpq)\
**Post date:** [24 August 2020 21:01 UTC](https://discourse.nodered.org/t/sequent-microsystems-relay-hat/31605/6 "2020-08-24T21:01:25Z")

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Thanks so much. I did get my own version working, but yours is much more integrated!

so much to learn!  
Best wishes  
Steve

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [23 October 2020 21:01 UTC](https://discourse.nodered.org/t/sequent-microsystems-relay-hat/31605/7 "2020-10-23T21:01:28Z")

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Closed on 23 October 2020 21:01 UTC

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