> For the complete documentation index, see [llms.txt](https://drotek.gitbook.io/additional-devices/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://drotek.gitbook.io/additional-devices/frequently-asked-questions.md). # Frequently Asked Questions * **RM3100 magnetometer sensor is not recognised by the software** One can test the status, start and analyse the RM3100 magnetometer sensor via QGroundControl (QGC). \ \ QGC v4.2.3 > Select logo (top left corner) > Analyze Tools > MAVlink Console > \ \ 1\. rm3100 info - to view the commands that can be used to manipulate the sensor\ 2\. rm3100 status - to check if the mag sensor is working/activated or not\ 3\. rm3100 start -X - To activate the mag sensor via the I2C serial port\ 4\. rm3100 start -S - To activate the mag sensor via the SPI serial port\ 5\. rm3100 stop - to disable the mag sensor * **How to analyse the RM3100 mag values on a software?** QGC v4.2.3 > Select logo (top left corner) > Analyze Tools > MAVlink Inspector > \ \ 1\. HIGHRES\_*IMU -* Mark xmag, ymag, xmag for results of the external magnetometer\ *2. SCALE*D\_*IMU* - Mark xmag, ymag, xmag for results of the internal magnetometer * **RM3100 stopped working? How to fix it?** Update the firmware of the autopilot only if possible. \ Please try the above commands to test the functionality. \ Apply the stop command to the rm3100, then restart the software and the computer. Re-start the rm3100 with the corresponding serial port and check the status. Note: \ The Sirius RTK GNSS Rover (F9P + RM3100) that contains the same RM3100 mag sensor can be troubleshot similarly to the above steps. * **How can you integrate the internal and external compass on a SIRIUS RTK GNSS ROVER (F9P + RM3100) with the help of an Pixhawk3Pro autopilot?** On QGroundControl (QGC), we can enable and disable the mag parameters with the following configuration: \ QGC > Vehicle Setup > Parameters > CAL\_MAG0\_ID/CAL\_MAG1\_ID\ \ You may identify the MAG\_IDs by simply connecting the internal compass first (Pixhawk 3 Pro flight controller) to check for the ID and then attach the external compass (SIRIUS RTK GNSS ROVER (F9P + RM3100). \ Once the IDs are identified, one can calibrate the external compass with respect to the orientation of the autopilot. You may check on the 'Set Orientations' topic on the Px4 guide: * **What is the best telemetry kit? How can I choose my telemetry and what is the most suitable range kit?** The general idea for telemetry communication link is to respect the rule of the ''Fresnel zone'' for a successful link between the base and the rover. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://drotek.gitbook.io/additional-devices/frequently-asked-questions.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.