Instructions and a slight modification to run the BuildHAT directly from any TTL serial port
If the BuildHat becomes wedged, you have to manually power cycle it, as the OOB GPIO signaling for reset doesn't work.
You'll need a GPIO header and a USB to TTL adapter
Flip the BuildHAT over and install the header into the GPIO plug.
Connect the USB to TTL adapter. For this adapter, black is GROUND, Green is Tx, White is Rx.
Connect the power
Now run your IsoBuildHAT script on whatever computer the USB to TTL adapter is plugged in to.
You'll need to specify the serial device when you create the Hat object like so.
hat = Hat(device="/dev/cu.usbserial-1111")
A STL file for mounting BuildHAT...