Blog
Writing on nRF9151/nRF9160 Feather development, Zephyr RTOS, and cellular IoT.
Solar Monitor Setup
A complete guide to wiring an EG4 6000XP inverter to a Raspberry Pi and running Solar Monitor for local monitoring, settings management, and notifications.
Getting started with NTN on the nRF9151 Feather
NTN extends NB-IoT over satellite — connectivity anywhere your device can see the sky. Here's the full bring-up on the nRF9151 Feather with Skylo and Soracom: modem firmware, the two-IMSI SIM dance, band locks, and the AT commands that got a live satellite attach.
Zephyr Tools 0.6 for VSCode Now Available!
Zephyr Tools v0.6 is here, headlined by Zephyr SDK 1.0 support and automatic per-workspace SDK management — plus a roundup of everything that landed across the 0.5.x series since our last post.
nRF9151 Feather Basic Now Available
The nRF9151 Feather Basic is now available — same A1A silicon, same form factor, minus the onboard debugger. Lower BOM cost makes it the right choice for production runs.
Zephyr 101 - Data Usage Optimizations for Cellular IoT
How to cut cellular data usage and power draw by more than half on the nRF9151 Feather — using PSM, always-open CoAP/DTLS sockets, and a few firmware tricks that are easy to get wrong.
Chasing microamps: getting the nRF9151 Feather to 4 µA in active sleep
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.
Introducing Lion: A Self-Hostable IoT Server for Zephyr Devices
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.
Zephyr 101: West, Overlays, and Faster Builds in Zephyr Tools
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.
Debugging the nRF9151 Feather with probe-rs
Debugging your nRF9151 Feather has never been smoother: install the debugger extension, configure your launch settings, flash your code, and dive right into debugging within VS Code.