ISSUES
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we can now suggest a starting location to the GPS
- express this as a PR, store last fix in the flash? restore on load?
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serial polling is lossy, we should be polling complete phrases at least
- express this as a PR
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Google wants an example that sleeps when accel isn't going, wakes on movement, and then publishes until unit stops moving.
- express this as a generic example / PR when done?
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GPS RTC battery doesn't seem to work
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datasheet shows 1u cap needed on vbackup line to gnd
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fixing this will make a big difference.
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can't load / acquire almanac / satellite EPO / ephremetis data
- pre-loading this would be cool.
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we can now suggest a clock time to the GPS
- express this as a PR, make sure it only does it when GPS clock isn't set, and good server time is available
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GPS might get stuck in a weird state?
- should we hot-restart every 10 minutes or something?
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cell modem might interfere with GPS
- can we try getting a fix with the radio off? before powering up the radio and reporting in?