Tasmota: Two Sonoffduals communicating

[sammyke007]

Hi everyone.

I've ordered two Sonoff Duals (R2) to control my lights.
I've read all of the wiki a dozen of times and hope that this configuration is correct?
The wallswitch currently available at Sonoffliv only has 1 hardware switchwire to "light living".
The wallswitch currently available at Sonoffeet only has 1 hardware switchwire to "light eetkamer".

I want to control both lights from both wall switches (and from Domoticz afterwards) without hassling about wether the hardware switches are on or off. I know that i must use TOGGLE for that.

I hope my sketch is clear?

Tnx in advance!

[sammyke007]

Damn... I seem to understand that I cannot use switch 1 local for relay 1 (Switchtopic = 0) and switch 2 to control another Sonoff Dual's relay 2 (Switchtopic = Sonoffeet)?

BUT
I can set Switchtopic on both Sonoff duals to eg: Sonoffwoon where SWITCH1 (and POWER1) switches relay 1 on the left Dual and SWITCH2 (and POWER2) switches relay 2 on the right Dual. Correct?

Like this?

[gajotnt]

Why not use a software like Domoticz, and set the 2 duals to use the same IDX and there you go problem solved

[sammyke007]

It is intended to be used on my Domoticz.

Do you mean switchtopic = 0 (default) and set idx1 and idx2 on both duals the same?

Can you get a little bit more into detail please? Tnx for taking your time!

[gajotnt]

I think it should work well this way.
Where IDX: 22 and IDX:23 is your corresponding devices in domoticz

[sammyke007]

That seems to be a great solution! Can't wait for the (hopefully R2) duals to arrive!
I guess SwitchTopic doesn't need to be the same for the domoticz config to work?

[gajotnt]

In this case since for all effects you only need one relay (one for LightLiving and another for Light eetkamer) a sonoff basic should have been enough and smaller. And the switches could be pluged to GPIO 0 and GPIO 14.
But this way you have will also do :)

[sammyke007]

I tought of that too, but the Basic has 1 relay, and as far as I know, that wil give problems with 2 switches and 1 relay. In the situation above pressing the right switch on either of the wall switches, activates both relay 2's where one of the two is not connected and vice versa.

When I have 2 switches and 1 relay, switch 1 (GPIO0) will switch relay 1, switch 2 (GPIO14) will switch relay 1 too.
I can't connect the hardware wire on the relay of the second basic because it will always be relay 1...

Relay 1 needs to be switched on 1 wallswitch by switch 1 and relay 1 from the other wallswitch to be switched by switch 2. That is not possible AFAIK.

Or am I wrong?

[gajotnt]

Try to see if you understand my logic

[gajotnt]

It should work like this, since i have in my bedroom a basic, that turns on the room light and turn on another sonoff basic that controls the bedside lamp

[sammyke007]

I think I completely understand!
I made a little text change in your graph.

So in 1 Sonoff the Switch1 (controlling the relay 1) is IDX22, in the other Sonoff Switch 1 (controlling the other relay 1) is 23. Thank you gajotnt!!!

[gajotnt]

Yeps, thats the idea :)

[sammyke007]

I've tested it today on a Wemos D1 mini, configured as a Sonoff Basic with 2 switches and it works!
Switchtopic needs to be set to 1 and serial logging needs to be turned off. Then I configured GPIO 14 as Switch1, GPIO1 as Switch2 and GPIO3 as Relay2 (dummy/not connected). On my Wemos I connected a LED to GPIO12 (Relay1) for testing.
In Domoticz I configured both IDX1 and IDX2 and that's all! I now have 2 toggles and I can toggle both Domoticz devices with the switches. Tnx A LOT gajotnt!