Could someone please help and explain something about the Shelly 1 relay.
My question concerns the operation of the relay remotely and also by the local SW terminal on the relay. It looks to me like power to the SW terminal switches the relay on. But what if the relay has already been switched on by a remote command. Also, if power is applied to the SW terminal to turn the relay ON, can it then be turned off by a remote command.
I already use several Sonoff relays and their SW equivalent just toggles the relay, as does a remote command. So they operate just like regular 2 way switching and the actual position (up/down, on/off) of any local manual switch is not tied to the relay state.
How does the Shelly handle this though? Maybe the same as Sonoff?
I can find no answer to this and so far Shelly themselves have simply failed to answer my query, which is hardly impressive customer support.
So would appreciate it if anyone can explain how the Shelly 1 handles the 2 switching methods.
I did previously read that page you linked to, but it doesn’t answer the question, so thank you for confirming that the Shelly SW terminal for manual control operates as a toggle, same as Sonoff.
Relays are devices that turn power to circuit completely on or off. Shelly’s are designed to be installed behind a standard wall switch and will give you wifi control over that load. What makes these shelly devices different from other smart switches is the fact that you will still use your existing light switches to control them,
The shelly actually has support for different button types: momentary, toggle, edge, detached and activation switch. You select this from the shelly web interface. If you select toggle then when you move the physical switch the controlled relay will toggle from whatever state it is in. If you select edge and you’ve changed the state of the relay via wifi, then edge will only have an impact if moving the physical switch would change the state of the relay. So if the physical switch is in the on position, the relay is on. If you then use wifi (HA) to turn the relay off and then you move the physical switch to the off position, nothing happens to the state of the relay. As the relay is already in the state selected by the physical switch.