Let us know how it goes! The NRF53 is pretty nice upgrade over NRF52. And yes, Zephyr is definitely the way to go here. The NRF52 port is in rather bad shape, and newer Nordic devices are just leaning more into Zephyr as the primary base SDK.

I also purchased a 9151DK so will test that also.

The main points I need to figure out are:

• How to do sleep/low power. Zepyhr handles this well and reduces power to a couple of uA when idle, not sure how to get this working in mp.
• How to interact with some of the newer featurs, for example the 9151 has cellular/gnss, how do I interact with that from mp. Assume I would need to write a new library

I have light sleep working now and can get 4uA during sleep from micropython.

#16864