RT-Clock Accuracy - Possible to use time from GPS

F Fred Baker 3 years 7 months ago
2 1 0

Team, A customer writes me:
Hi Fred,

 

 

I've checked the documentation of MC9500-K because of my own interest.

 

 

What I've found gets me down ;o)

 

 

We're in 2009 but it seems that this professional mobile computer has still no RTC (realtime clock) on board.

 

 

Is that right?

 

 

With HC700 we've had a lot of problems because of clock-deviations after warm-boots.

 

 

A daily clock-sync. and a RTC-module will allow to have only very small deviations between tackles.

 

 

(Within deutsche-post this is an issue because of the small acceptance-zone (deviation) of 1 minute for postal collection within the times stated is acceptable.) ====================================================================== This brings up the question whether the GPS data stream which contains a very accurate timeclock can be used to keep the MC9500 clock more accurate (within a second)? Thanks for the input, Fred Baker

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1 Replies

Y Yanis Dalabiras

The MC95 does have a real time clock. Yes, you can extract the date/time from the GPS the date/time is in the $GPRMC string - its in UTC. - This is a common way to sync the clock.  You could also use the NITZ time (WAN/GSM) if the carries supports it - enabled by default on MC95

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