First question. Do you have two wiring issues or one? In another threadl, which was split to a new thread, you said that what you had matched a diagram I drew. That diagram doesn’t match what you described here, so trying to understand how many issues you have.
I created this thread. An admin tried to be helpful and created the other thread.
None of the “official” wiring diagrams from Inovelli match my situation. I think my wiring matches this diagram that you posted.
I verified that the line is in box 1. I connected the two travelers together and did a continuity test at box 2 to find the travelers and (what I assume) is the load. The travelers pass through a intermediate junction box, so the traveler colors change, but they pass the continuity test.
Got it. Glad you posted this again as I had posted this configuration and a non-standard one. This one is a standard power to the light in the middle so there is a solution.
There are a couple options depending on which box you want the switch in. Take a look at this thread starting at my post. Also scroll down. How you do it depends upon which box has the non-neutral hot and which box you want the Inovelli in. You will need to use an Aux in the other.
This should get you started, but post back with questions.
You can’t use two dimmers if you’re following the 2nd diagram, as there is no way to power the 2nd dimmer in a non-neutral without a load. If you can get a the light box where the two 3-wires meet, you ought to be able to re-wire it to send a hot and neutral to each box, but without re-wiring at the light, I don’t see any way to do two dimmers.
Setting the dimmer to three-way momentary was the necessary magic. I tried setting the aux from the switch and it apparently didn’t save. I then tried setting it to 3-way Toggle in Hubitat. Neither worked.
Once I set it to 3-way momentary, the add-on switch started working properly.