The shield development is on hiatus. I have medical appointments & procedures scheduled for most of this week. I'll pick it up once those are behind me.

There is an issue to be solved before I get prototypes made - all official Arduinos are 5V only so these 3V3 devices cannot be used with them. I do not want to add voltage regulators to the shields so need to find a practical solution for a 3V3 clone. There are 3V3 compatibles but the overall picture is very murky.