Sniffing network packets from a cellular modem is actually pretty easy. It only seems daunting because at first glance you're left wondering how to acquire the packets. Nordic's nRF91 modems have a trace capability that can be used to pipe packets from the device into Wireshark over a USB connection. Here's how to use it.
The SIMCOM SIM7080G is a Cat M1 / NB-IoT modem that focuses on low power applications. We tested out the modem using Zephyr's subsystem to connect to the Golioth Cloud.
Spring is a time of renewal, growth, and fresh starts—and your IoT projects deserve some spring cleaning, too! Dust off those ideas sitting idle, sharpen your embedded development toolkit, and join us for a free Zephyr RTOS Training on April 30th, 2025.
The Zephyr shell subsystem will help you directly interact with and troubleshoot your IoT hardware. This post details our most commonly used commands, as well as a listing of all Zephyr shell modules that we could extract from a recent project.
The Nordic nRF91 modems include secure storage for TLS credentials. This may be used to authenticate with Golioth. The assets are stored separately from the firmware, and once written, they cannot be read back from the device. This guide shows the process of storing and using credentials.
Golioth removes the pain of connecting constrained devices to the cloud. This post shows you how to add Golioth to your existing Zephyr project and get your first device connected.
Golioth is hosting a free Zephyr training on February 26th, 2025. Join us for this three-hour crash course that will get you up to speed with the basics of building IoT applications using Zephyr RTOS.
