Hello,
I have ball water valve with no spring and three wires
1 inch, 220V AC and 3 wire connection
Probably, but you need to post link to your valve documentation. The image makes no sense with N on yellow/green wire.
Wow. Every scheme is different. Is that orange image what you really have printed on your valve? Do you have blue/brown/black wires or something else?
Yes - the orange is printed on valve
and I have three wires: blue, brown and black.
Since the Sonoff Basic R2 devices do now have 2 pole switch contacts (ie: Normally open and normally closed) then there is no proper safe way to use ONLY once of those devices. The best solution (for safety) is to wire in a 2 pole relay to provide the N.O / N.C contacts.
OR
use the Mini (if its’ the one I’m seeing online)
This one?
If so, wire it like this:
Your actual sonoffs can’t control this without additional relay.
I personally would go with Esp32 board and relay module on Esphome.
Just pick your preferred default state and wire that to NC, another to NO.
I have plenty spare ESP32 modules and 4 relay modules,
they have 4 x 2 wire connection
If you can show me how to wire them?
Solid state relays??
They are not the ideal way to control your valve since these don’t have NC contact like normal relays. I’m not saying you can’t use them but you need to take care of the interlock on your code.
Also, some link or datasheet would be great, I’m not even sure they work at 3.3V trigger.
This would be easiest way to go:
OK - thank you
I think I will go and buy Sonoff Dry Circuit as @sparkydave wrote.
Thank you for your help.
If flashing the firmware is straightforward, that’s good option.
Or simply wire a relay into the Sonoff R2 that you have so it provides both N.O. and N.C. contacts. That would be cheaper than buying another Sonoff
But I will still need NO/NC relay?
And it will be possible to open and close Valve?
Yes to both questions. I’ll draw up a schematic a bit later for you but it’s very similar to my last one.
Basically just use the output off the Sonoff to power the coil of a relay. Be sure to get a relay with a 240 (or 230) V coil. Most relays of that sort with have both N.O. and N.C. contacts
