jlpoole/MotionCal
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@ -1,13 +1,14 @@
# MotionCal # MotionCal
![](img/MotionCal_2026-04-25_11-22.png) ![](img/MotionCal_2026-04-25_11-22.png)
MotionCal is a desktop magnetometer calibration utility originally written by Paul Stoffregen. This fork is maintained at: MotionCal is a desktop magnetometer calibration utility originally written by Paul Stoffregen. This fork is maintained at:
```text ```text
https://salemdata.net/repo/jlpoole/MotionCal https://salemdata.net/repo/jlpoole/MotionCal
``` ```
Upstream source: Paul's upstream source:
```text ```text
https://github.com/PaulStoffregen/MotionCal https://github.com/PaulStoffregen/MotionCal
@ -119,13 +120,18 @@ Run the GUI with:
```sh ```sh
cd /usr/local/src/MotionCal cd /usr/local/src/MotionCal
GDK_BACKEND=x11 ./MotionCal ./MotionCal
``` ```
Then select the T-Beam USB serial port in the MotionCal window. Then select the T-Beam USB serial port in the MotionCal window.
If running under Wayland and the GUI has trouble starting or rendering, `GDK_BACKEND=x11` forces the wx/GTK path through X11 compatibility. If running under Wayland and the GUI has trouble starting or rendering, `GDK_BACKEND=x11` forces the wx/GTK path through X11 compatibility.
```sh
cd /usr/local/src/MotionCal
GDK_BACKEND=x11 ./MotionCal
```
## Calibration Procedure ## Calibration Procedure
1. Flash and start the T-Beam bridge firmware. 1. Flash and start the T-Beam bridge firmware.