mirror of https://github.com/espruino/BangleApps
30 lines
1.3 KiB
Markdown
30 lines
1.3 KiB
Markdown
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# Compass
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This app uses Bangle.js's built-in magnetometer as a compass.
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## Usage
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Hold your Bangle.js **face up** (so the display is parallel to the ground),
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and the red arrow will point north, with the heading in degrees printed at
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the top of the screen.
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This compass app does not include tilt compensation - so much like a real
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compass you should always keep it face up when taking a reading.
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The first time you run the compass after your Bangle has booted (or if
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you move to an area with a substantially different magnetic field) you will
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need to recalibrate your compass (even if a heading is shown).
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## Calibration
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Press the button next to the `RESET` label on the screen. The North/South marker
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will disappear and a message will appear asking you to rotate the watch 360 degrees.
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* Hold the watch face up, so the display is parallel to the ground
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* Rotate it around slowly, all 360 degrees (with the display still parallel to the ground)
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* The `Uncalibrated` message will disappear before you have finished rotating the full 360 degrees - but you should still complete the full rotation in order for the compass to work properly.
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Once you've rotated the full 360 degrees your compass should now work fine,
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and calibration is stored between runs of the app. However if you go near
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to a strong magnet you may still need to recalibrate.
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