Right, these are not SH compatible. Upon paying better attention, SH is 1mm pitch. But these do look compatible with cheaply available 1.25mm pitch pre-made cables, which is what I had in mind. I’ll be ordering the connectors separately from the PCBs to avoid the manual soldering fee, so I’ll get a couple different brands to try since they’re so cheap.
Great to hear the work is already done on I2C communication 
I made a few more minor modifications, and placed the order for the boards. The most significant thing is that I moved the 2mm pitch communication pins over with the power pins on the right, and changed it so both those and the programming connector use I2C1 so you can issue commands via the programming connector as well without having to change the code. You can still use an I2C LCD or other devices on the same bus, so there wasn’t much advantage in having I2C2 available, plus this simplifies the routing.
Unfortunately at some point I forgot to pay attention to which SPI pins are also ADC, and ended up with only one ADC pin on the encoder connector so I won’t be able to use linear hall sensors on it. I’ve since corrected it, and I will be able to connect linear halls via the programming connector so no big deal. It’s a great relief to have the MOSFETs confirmed before they’re out of stock. Now even if I did make any serious mistakes, the worst case is I have to transplant them to new boards.
Thank you to everyone for your input! And sorry for taking over your thread, Valentine I’ll start a new thread when my boards arrive in a few weeks. For now it’s back to machining aluminum while I wait.
