Tasmota: Controlling "Roller shutters" with electrodragon "ESP Relay Board IL (Inductive Load)" board?

[nardev]

It looks to me as a perfect board for motor which is commonly found in aluminium blinds/Roller shutters. That motor has two L phases and common N.

Each phase is actually different direction for the blind and stopping position is actually already adjusted in the motor while installing it.

But here is the thing, two relays must not be on at the same time, so turning off for both relays before sending next command is essential.

I believe also any other two channel SONOFF would be useful but again, same issue. The device must be treated as "single relay" board, where one relay is on/open and another relay is off/close blinds.

The is how it usually looks:

The shutters

And usually the motor wiring is this:

[Frogmore42]

If you had used the search function for "rolling shutter", as the template tells you to do, you would have found 5 issues with that in it.
https://github.com/arendst/Sonoff-Tasmota/issues/1600 has the answer you probably need.

[nardev]

it's almost the same but not...

Would be nice to have that, clearly defined in the software.

[Frogmore42]

Tasmota is a general purpose piece of software. If you feel there could be more documentation on how to use it with rolling shutters, please add a section in the wiki for that. That is one of the nice things about the wiki, you can use it to share your knowledge with those that come after you. I don't have rolling shutters, but I have seen the same questions come up a few times.

Since Tasmota is general purpose, some things might require more configuration than you might like. I think it is a decent tradeoff for something so versatile that still manages to fit in the constraints of the esp8266.

[nardev]

Well, i understand it now.

I didn't check the code so far, but if there is some space for "modular" approach, i would definitely add some module/option which would be able to handle this.

It's actually very simple code case, i don't thing it could damage the "general purpose" approach which you try to maintain.

Anyway, than you.

[Frogmore42]

I didn't write the code. Since you believe it is simple and important, take a look at the code, propose a change, code it, test it, and maybe Theo will make it part of the main code.

Many months ago, I did that with the BME280 code. I fixed it for my specific usage and shared it. Theo saw it, generalized it and now everyone benefits from it.

[ascillato]

You can use setoption14 that is interlock for relays. As frogmore42 explain, in #1600 is the solution. Hope this helps.