3-way switch with No-pahse extra at the end (shelly without feed)

Hello there,

I have a little issue and I do not know how to solve it. I have this setup. I want to install a Shelly 1 at the end of the line in the wall switch, but I do not have more phase to feed the shelly, and on the ceiling where the light is, I do not have either another phase to feed the shell, so I do not know how to conet phase to feed the shelly.

The only way is to eliminate the first 3-way switch in order to get phase from the begining until the last switch to carry the "hot" to the shelly 1.

Is another way or other type of switch or rele, to get phase at the end when you do not have more phase wire available without eliminate one switch?

I was thinking to conect some kind of rele at the end of the switch, which provide me phase independiently if the 220V comes from one wire or the other wire, there is any circuit that does that?

Thanks.

But whe I put the momentary switch in bot wall switches? or at the end?

I want to keep operative both wall switches, I do not mind to change them by other type.

Aaahh now I understand.

You mean, momentary switch NC in both wall switches conected to the SW, and then send thorugh the other wire, the live to the shelly.

When one of both momentary switch is pressed send the signal to the shelly and switch ON/OFF.

Mmm interesting.

Thanks for the tip.