Shelly Dimmer 2 - Wiring with two way switches and without neutral

Edit: See the next post for an easier way than described in this post.

If you change the 2 way switches to regular 1 way than you can use the existing two wires between them to send L from the Switch 1 location to the Switch 2 location.

And the L' going from the Switch 2 location to the Switch 1 location.

This would give you the possibility to add a Dimmer 2 at the Switch 2 location.

No the part I don't know if it is possible is a adding a second device because they would both use the same bypass.

If it is possible than you can add a 1L at the Switch 1 location as you now have both L and L' at that location too.

The 1L would get the switch input and would execute an API HTTP request (configurable under Actions) to the Dimmer 2 and hence controlling the light.

There might be an even easier way.

Like with the previous solution use regular 1 way switches at both locations.

Use 1 wire between the locations to forward L from location 1 to location 2.

And use the other wire as the output from the switch in location 1 and connect it together with the output of the switch in location 2 to the SW1 input of the Dimmer 2 that is also located at location 2.

See attached diagram.