Three commits on the v3.2.x branch of NFED take the active_sleep sample to ~4 µA on the nRF9151 Feather — a regulator-framework workaround, board-level pulldowns on floating pins, and the teardown sequence that ties it all together.
If `west build -- -DEXTRA_CONF_FILE=...` is forcing a pristine rebuild every time, you're paying for it. Here's a step-by-step how-to for using West overlays correctly, plus the new conveniences in Zephyr Tools that make it disappear.
After three iterations and a lot of false starts, I'm finally happy enough with my IoT server to talk about it. Meet Lion: a self-hostable backend for Zephyr devices, with some opinions about how device shadows, OTA, and log streaming should work.