> For the complete documentation index, see [llms.txt](https://agamrobotics.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://agamrobotics.gitbook.io/docs/autopilots-flight-controller/quickstart/faq.md).

# FAQ

<details>

<summary>What needs to be done when Agam Autopilot says compass 0 missing?</summary>

Typically this happens when you have connected a GNSS module which has a Magnetometer to the Autopilot. PX4 disables the internal Mag if an external Mag is detected. If you disconnect the GNSS module, now the system doesn't have an Mag which results in Compass 0 missing error. Search for the parameter CAL\_MAG0\_PRIO and set it to Medium(default) if it is Disabled. Even after setting it to Default, the Autopilot has not detected the Mag, please contact <info@agamrobotics.com>

</details>

<details>

<summary>How to take advantage of Triple IMU feature?</summary>

Set **SENS\_IMU\_MODE** = Disabled (0)

Reboot

Set **EKF2\_MULTI\_IMU** = 3

Reboot

</details>