mirror of https://github.com/espruino/BangleApps
65 lines
2.4 KiB
Markdown
65 lines
2.4 KiB
Markdown
# GPS Clock Info
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A clock info that displays the Ordanance Survey (OS) grid reference
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- At the start of the walk update the GPS with using one of the AGPS apps. This will
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significantly reduce the time to the first fix.
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- I suggest installing the GPS power widget so that you can be assured
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when the GPS is draining power.
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- The primary use is for walking where a GPS fix that is 2 minutes old is
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perfectly fine for providing an OS map grid reference.
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- Saves power by only turning the GPS on for the time it takes to get a fix.
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- In a static test from 100% charge the battery fell to 20% over 48 hours.
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- It then switches the GPS off for 90 seconds before trying to get the next fix
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- Displays the GPS time and number of satelites while waiting for a fix.
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- The fix is invalidated after 4 minutes and will display 00:00:00 0
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or the gps time while the gps is powered on and searching for a fix.
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- If the display is shows solid 00:00:00 0 then tap the clkinfo to restart it
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as it will have timed out after 4 minutes
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- It is unlikley that this style of gps clock info will work well with the Recorder
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app as that would hold the GPS power permantly on all the time during the
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recording.
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- The design is intended to be minimal so if you want to complicate matters
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please fork the app.
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## Screenshots
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- Above: The GPS is powered on and waiting for a fix.
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- The GPS widget shows yellow indicating powered on
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- The time from the GPS chip is displayed with the satellite count
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- The time from the GPS chip is incrementing approximately every second
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- Note the time on the GPS is in UTC and not the current timezone
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- Above: The GPS has a fix
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- The OS grid reference has been calculated
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- The GPS has been turned off for 90 seconds
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- The GPS widget is grey showing the GPS is off
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- You will not see the GPS widget turn green as the GPS is turned off after a fix
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- Above: The GPS has been powered on after 90 seconds and is waiting for a fix
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- Above: The GPS has not had a fix for 4 minutes and the cycle has stopped
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- The time from the GPS is 00:00:00 0, indicating that the GPS not on
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- The GPS widget is grey showing the GPS is off
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- Tap the clock_info to restart the GPS clock info
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Written by: [Hugh Barney](https://github.com/hughbarney) For support and discussion please post in the [Bangle JS Forum](http://forum.espruino.com/microcosms/1424/)
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