I will also say that this is easy enough with termux, termux-location and a simple shell script on android if you think fpc + android is overkill.
Well, what I really am looking for is a way to get GPS positions logged to a file at regular intervals.
On a Linux machine I would probably do something like:
- Install GPSD
- Configure it to save the position once a minute or so to a file.
or
- Create a cron task running once a minute that:
- reads the NMEA output until the proper message is found
- writes that message to disk in a log file
In both cases I would use Lazarus to create a visual display of the "track" of the phone.
And no external entity will be involved, thus privacy ensured.
Anyway, thanks for your suggestion for termux! It seems from its homepage like it can co-operate with Tasker...
I have Tasker installed for other purposes and it might just be able to do what I need, provided I can trust it to not have backdoor access points from the makers of Tasker...
So I will try Tasker for my tracker log project.