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richonguzman / LoRa_APRS_Tracker

LoRa APRS Tracker with Tx and Rx capabilities, Messages, Wx, Winlink and more...
MIT License
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Changing timezone #58

Closed sp2csr closed 5 months ago

sp2csr commented 6 months ago

Is it possible to change the time zone of gps time data?

richonguzman commented 6 months ago

hi, the Time Zone is what you receive from GPS, which is UTC time

do you need a special custom Time mod for using in another GMT time zone?

sp2csr commented 6 months ago

No no, i need info how to display correct time (for my Loc) on Tracker Display.

richonguzman commented 6 months ago

will try to find something, but the data from GPS have always been UTC time , this is why only this is showed.

as far as I know there is no GMT correction available with this library, but will see if I can do something about it

iw2ejh commented 6 months ago

May be you refer to the daylight saving time? My tracker show 12:35 while the APRS.FI report the beacon as 13:35.. Now the time here is 13:35. During summer, the times are aligned. https://en.wikipedia.org/wiki/Daylight_saving_time_by_country

richonguzman commented 6 months ago

yes! satellites only send UTC time, they dont care about your position or daylight time savings. This is a local thing and should be handled this way.

looking for a code mod to enable some corrections about it

Szetya commented 5 months ago

Maybe the function setenv() for the system time. It can handle time zones and daylight saving time.

richonguzman commented 5 months ago

i don't find it to clear to implement, besides looks not updated for long time.

should this be handled on a self build library o function?

Szetya commented 5 months ago

Now I look, this function belongs to the NTP library. Unfortunately, since the tracker has no internet connection, it is not good. :(