Putting the final touches on our Mifi-based prototype and noticed that in our application one of the biggest wastes of network bandwidth is NTP which generates a fair amount of traffic to keep the Mifi date in sync. We purchased with a Quectel EC-25A card, and noticed the GPS antenna connector. Have you any experience or documentation on trying to use the GPS built into the EC-25A card? Or at least some development documentation for the EC-25A so we can try and figure it out?
At this point we are just looking for a way to try and set the system clock using GPS instead of NTP… but having a functional/working GPS would open up other possibilities for future projects.