DIY 3D printed case for the Yushakobo Primer61 PCB I got in Japan over the holidays. I didn’t buy one of their BLE Pro Micro boards, but had a Nice!Nano clone, so I learned just enough ZMK to port it over and use it wirelessly. More HERE. Not my cleanest print, but I’m happy, and pretty stoked I didn’t set it on fire trying to use an unsupported MCU with a wireless firmware.
Oh wow. That Shield Wizards looks really nice! Thanks for sharing it.
Regarding battery life: There is a possibility in ZMK to add an interrupt line to allow the MCU to go into deep sleep. It of course needs to be supported by the circuit. I took a look at their QMK firmware for the Prime61 and it seems like it also does not use an interrupt.