RTC on Berry GPS-IMU

[bepeho]

Hi Mark,

I’ve the GPS berry-imu installed on my rpi3B+.

It works fine.

Is there a standard way to use it also as a clock ?

I’ll operate the system disconnected from the internet, and RTCs are using the same pins as the GPS.

I know I have the  option to retrieve the satellite time from one of its NMEA messages and sync the local time, but i’d like a leaner option

Many thanks for your help,

Patrice

 

 

[Jon]

I’d also like to know if there is a way to use the GPSIMU as an RTC.  Any help on this would be appreciated.

[bepeho]

Hi Jon,

I had to programmatically synchronize the rpi clock.
A periodic task gets the gps time and call a the system date command

In Java, that’s:

Date date1 = new SimpleDateFormat("ddMMyyHHmmss")
.parse(gpsDate.stringValue() + gpsTime.stringValue());
cmd[0] = "/bin/date";
cmd[1] = String.format("-s %s", date1);
ProcessBuilder processBuilder = new ProcessBuilder(cmd);

I hope it helps.
Patrice

[Author]

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