Hi
For a high altitude balloon I want to add a GSM Tracker as a backup to my other tracker. I thought about buying a commercial one, but then remembered that I might as well build my own.
So I found this online.
Would that work? Does it support the standard GPS library?
How much current would it draw if I only sent an SMS every 10 minutes or so? I would be running it for maximum 6 hours on battery.