RE: Debugging hello nrfcloud

Øyvind — Thu, 16 Oct 2025 07:26:04 GMT

Hello!

[quote user=""]We need to modify the hello-nrfcloud firmware to suit our application.[/quote]

We would recommend starting with the Asset Tracker template when designing an application for the Thingy:91 X. As described in the documentation, it is a framework for developing IoT applications on nRF91-based devices. It is built on the nRF Connect SDK and Zephyr RTOS, and provides a modular, event-driven architecture suitable for battery-powered IoT use cases. The framework supports features such as cloud connectivity, location tracking, and sensor data collection.

[quote user=""]Could you suggest the best approach to creating a debug version of the firmware and which tools to use for debugging[/quote]

If you are new to our cellular applications or have not done the course in a while, we recommend going through the Cellular IoT Fundamentals training in our Developer Academy. If you have a nRF9151DK you can use this as a external debugger to program the Thingy:91 X, or you can use e.g. a Segger JLink BASE Compact.

[quote user=""]uses Segger JFlash connected to the debug connector and setting the switch the rRF91[/quote]

Yes, make sure to set the switch to nRF91, as the nRF5340 SoC is primarily used to add USB connectivity to the Nordic Thingy:91 X.

Let me know if you have any further questions. Make sure to go through the documentation regarding Thingy:91 X in our SDK documentation.

Kind regards,
Øyvind