History

hughbarney f7dd6badd3 kitchen detect missing waypoint.json file		2021-06-02 23:30:42 +01:00
..
ChangeLog	removed LCD1.write() from arrow as it was keeping LCD on	2021-03-18 12:03:24 +00:00
README.md	kitchen detect missing waypoint.json file	2021-06-02 23:30:42 +01:00
app.js	removed LCD1.write() from arrow as it was keeping LCD on	2021-03-18 12:01:14 +00:00
arrow.png	updated arrow.png as it was inverted	2021-02-24 20:48:32 +00:00
arrow_screenshot.jpg	Added screenshot for Arrow Compass README file	2021-02-24 20:25:06 +00:00
icon.js	added Moving Arrow Compass	2021-02-23 23:54:52 +00:00

README.md

Arrow Compass

A variation of jeffmer's Navigation Compass. The compass points North and shows the current heading.

This is a tilt and roll compensated compass with a linear display. The compass will display the same direction that it shows when flat as when it is tilted (rotation around the W-S axis) or rolled (rotation around the N-S) axis. Even with compensation, it would be beyond foolish to rely solely on this app for any serious navigational purpose.

Calibration

Correct operation of this app depends critically on calibration. When first run on a Bangle, the app will request calibration. This lasts for 30 seconds during which you should move the watch slowly through figures of 8. It is important that during calibration the watch is fully rotated around each of it axes. If the app does give the correct direction heading or is not stable with respect to tilt and roll - redo the calibration by pressing BTN3. Calibration data is recorded in a storage file named magnav.json.

It is also worth noting that the presence of the magnetic charging clamps will require the compass to be recalibrated after every charge.

Controls

BTN1 - switches to your selected clock app.

BTN2 - switches to the app launcher.

BTN3 - invokes calibration ( can be cancelled if pressed accidentally)

Issues

detect when calibration data is missing

Acknowledgement

This app is based in the work done by jeffmer