Difference between revisions of "GPS clock"
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(Created page with "There are two seperate yet related goals here: * Create a local timeserver for my network, based on a GPS time-source on a raspberry-pi. - Should use a 1PPS capable GPS modu...") |
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There are two | There are two separate yet related goals here: | ||
* Create a local timeserver for my network, based on a GPS time-source on a raspberry-pi. | * Create a local timeserver for my network, based on a GPS time-source on a raspberry-pi. | ||
** Should use a 1PPS capable GPS module. | |||
** Doesn't really need a display, though it can have one. | |||
** Wired networking is fine | |||
** I think it can almost entirely be based on existing packages, like gpsd, ntpd, etc. | |||
* Create a standalone clock, using a GPS source, based on a raspberry-pi | * Create a standalone clock, using a GPS source, based on a raspberry-pi | ||
** GPS can be a simple cheap, available one. | |||
** Doesn't really need super-accurate inter-second timing, we're only going to display to the nearest second anyway. | |||
** Absolutely needs a display of some sort | |||
** Should be able to work with no network at all. If wireless is available, to do FW updates or something, bonus. | |||
** Power usage is somewhat of a concern, though could start out using wall-wart power | |||
** A big 5" or 7" touch display is way overkill, but could display sun location, etc, and use touch for setup | |||
** Use GPS co-ords to pick local timezone. | |||
** OLED screen and batteries? | |||
** Could we get away with solar power? | |||
** low-power mode is a goal to get us off the plug | |||
** any way we can have it turn the display off when its not light out? or when I'm not looking at it? :) | |||
Things to Display | ==Things to Display== | ||
* Date & Time in several formats: | * Date & Time in several formats: | ||
** UT1 | |||
** UTC | |||
** Unix | |||
** Local | |||
** MST | |||
** AST | |||
* Number of satellites used in fix | * Number of satellites used in fix | ||
* Battery power left | * Battery power left | ||
| Line 37: | Line 35: | ||
* DST active | * DST active | ||
Things to Adjust | ==Things to Adjust== | ||
* Ideally nothing, other than date/time display preferences: | * Ideally nothing, other than date/time display preferences: | ||
** 12-hour/24-hour? | |||
** ISO formatting options? | |||
** which time choices (above) to display at all times | |||
* Other localization settings & options | * Other localization settings & options | ||
** C/F for temp | |||
** Power-saving settings? | |||
* Some way to initiate FW updates? | * Some way to initiate FW updates? | ||
** Would be cool if it would detect when my phone is making Wifi available, then: | |||
*** connect to that | |||
*** check git for FW updates (or somewhere) | |||
*** check somewhere for OS and kernel updates | |||
*** update itself if needed | |||
*** reboot/restart app if needed | |||
Anything else to make available? | ==Anything else to make available?== | ||
* Maybe a calculator? phone or laptop is more convenient, probably | * Maybe a calculator? phone or laptop is more convenient, probably | ||
* Some sort of calendar mode? Again, for something like this, more than a glance, phone/laptop more convenient | * Some sort of calendar mode? Again, for something like this, more than a glance, phone/laptop more convenient | ||
* Something else I could see at a glance? Home status? | * Something else I could see at a glance? Home status? | ||
Latest revision as of 14:07, 23 March 2017
There are two separate yet related goals here:
- Create a local timeserver for my network, based on a GPS time-source on a raspberry-pi.
- Should use a 1PPS capable GPS module.
- Doesn't really need a display, though it can have one.
- Wired networking is fine
- I think it can almost entirely be based on existing packages, like gpsd, ntpd, etc.
- Create a standalone clock, using a GPS source, based on a raspberry-pi
- GPS can be a simple cheap, available one.
- Doesn't really need super-accurate inter-second timing, we're only going to display to the nearest second anyway.
- Absolutely needs a display of some sort
- Should be able to work with no network at all. If wireless is available, to do FW updates or something, bonus.
- Power usage is somewhat of a concern, though could start out using wall-wart power
- A big 5" or 7" touch display is way overkill, but could display sun location, etc, and use touch for setup
- Use GPS co-ords to pick local timezone.
- OLED screen and batteries?
- Could we get away with solar power?
- low-power mode is a goal to get us off the plug
- any way we can have it turn the display off when its not light out? or when I'm not looking at it? :)
Things to Display
- Date & Time in several formats:
- UT1
- UTC
- Unix
- Local
- MST
- AST
- Number of satellites used in fix
- Battery power left
- Day of week (text) and month of year (text) and week of year (numeric, ISO)
- Time to sunset/since sunrise
- Temp/humidity/pressure
- latitude/longitude
- local time-zone
- DST active
Things to Adjust
- Ideally nothing, other than date/time display preferences:
- 12-hour/24-hour?
- ISO formatting options?
- which time choices (above) to display at all times
- Other localization settings & options
- C/F for temp
- Power-saving settings?
- Some way to initiate FW updates?
- Would be cool if it would detect when my phone is making Wifi available, then:
- connect to that
- check git for FW updates (or somewhere)
- check somewhere for OS and kernel updates
- update itself if needed
- reboot/restart app if needed
- Would be cool if it would detect when my phone is making Wifi available, then:
Anything else to make available?
- Maybe a calculator? phone or laptop is more convenient, probably
- Some sort of calendar mode? Again, for something like this, more than a glance, phone/laptop more convenient
- Something else I could see at a glance? Home status?
