Circuit Dojo: nRF9151 & nRF9160 Feather development boards

Zephyr 101 - ZMS: Zephyr Memory Storage

Nov 11, 2026

ZMS is Zephyr's write-balanced key-value store. Here's how to set it up on the nRF9151 Feather's external NOR, how its lookup cache really works, and why it beat LittleFS by 20 to 1,750 times for a gateway's routing table.

Turning a travel router into an LTE-M gateway with the nRF9151 Feather

Oct 26, 2026

One USB cable turns a GL.iNet GL-MT300N-V2 running OpenWrt into a cellular gateway, with the nRF9151 Feather as its WAN. CMUX splits the serial port so PPP data and AT commands share it, a small daemon keeps the link healthy, and mwan3 fails over from Ethernet to LTE-M.

Solar Monitor Setup

Jul 16, 2026

A complete guide to wiring an EG4 6000XP inverter to a Raspberry Pi and running Solar Monitor for local monitoring, settings management, and notifications.

Air Quality Wing (v6)

$36.00

nRF9151 Feather (A1A silicon)

$69.00

nRF9151 Feather (A1A silicon) - Basic

$59.00

GPS Antenna

$10.00

LTE Antenna

$5.00

Battery Holder

$5.00

Honeywell Particulate Sensor

$65.00

Female Headers

$3.00

Recovery & Programming Mini Fixture

$21.00

LTE + GPS Combo Antenna

$8.00

Hologram Hyper eUICC IoT SIM Card

$3.00

Recovery & Programming Mini Fixture (Male Headers)

$21.00