I have dumb rolling shutters that are operated by this switch:
This is what’s behind:
Does anyone has recommendation how to connect it to HA? Germany/EU here, and Zigbee/ZHA would work the best. Thanks!
I mounted two Shelly Plus 2PM behind my switches (one per roller shutter) and they are working perfect.
I did flash them with ESPHome so I can’t tell you how good they work with the Shelly soft/firmware. These are Wi-FI devices tho.
Hm, I don’t think there’s enough space behind for 2 of those. But its successor, Shelly 2PM Gen3, sure looks like it could work. Thank you for your suggestion!
Sorry, my explanation is not quite right. I’ve got two roller shutters at home so I mounted 2 Shelly’s. One in for each roller shutter. So, one Shelly per roller shutter behind the wall switch. They fit very well.
Yeah, that makes more sense 
Thanks for clearing that up. On my physical switch, when you press one button, for example to move shutters up, the other button is blocked and can not be pressed until the first one returns to zero position. Is it the same for you? I mean, I am not sure what would happen if both are activated at the same time and if these Shellys are preventing that?
I’ve got a rotary knob instead of two physical buttons like you. I cannot use both functions at the same time (up/down) like you. But, in my EPSHome config for the devices I used something called ‘interlock’. This option ensures that:
ESPHome has a feature to prevent two GPIO Switches from being active at the same time called interlocking.
So, in both our cases, with this option set in ESPHome, it is not possible to activate both up and down actions at the same time.
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Stock Shelly has software interlock as well.
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Does the Shelly have endpoint calibration for absolute positioning and reverse-after-stop for setting the slant angle of slatted blinds?
If not (and you need one or both of those features), there are shutter switches that do have those features, e.g. Homematic IP (although those come with a infrastructure overhead).
Good question, I’ll certainly check, though it doesn’t matter for my usage. Kids sometimes forget to put back the switch to neutral, and nothing happens. So I can turn it off after some time with automation, or maybe based by power monitoring, since this Shelly 2PM Gen3 does that too.