I believe they are. I have the 4 under the drivers set for the 5160’s.
However the 2209s have arrived. I just havent had a chance to get to the shop. But please correct me if I’m wrong. The Vref needs to be set and the uart jumpers need to be set on the board. Which if my research is correct, should be just the outer jumpers (red) that should enable the uart. Is there anything else I’m missing ?
My 2209s came set up in uart mode. All I had to do was plug them into the SKR 1.3 and configure the firmware properly. I was able to use prontoface and change the vref.