Wouldn't the almanac become stale as well, say after 6 months?
Wouldn't that be about the same thing as a cold start when the
system is booted back up?
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73 de N9VW, Steve
On 12/27/2018 10:34 AM, John D Hays -
go-kit. The backup battery is only good for a cumulative 40
days with no power attached to the DRAWS™ HAT. So if you
have let it sit for 6-months, you will need to replace the
battery and resync the RTC using the built-in GPS
suggest a blister pack of batteries in the go-kit. They are
relatively inexpensive and have decent shelf life.
On Thu, Dec 27, 2018 at 9:41 AM Budd Churchward
Sorry for not making
myself clear. The clock problem was something I saw
while using the UDRC-II which has no GPS. The Rpi does a
real lousy job of
keeping time all by itself. One of the best things about the
new DRAWS is
that we now have a solution. The GPS and the RTC with back
up battery are a
welcome addition to the digital controller. It looks like we
need to give
the board a chance to see the satellites and set up the RTC.
Then we can
tuck DRAWS into our Go-Kit and it will be ready when we need
it. The back up
battery is an important part of this plan.
73 Budd WB7FHC
John D. Hays