I've posted this on adafruit too - apologies if you read this twice.
I have three dogs. Two of them run whenever the gate is slightly open (they're rescue dogs and this is Scotland - there's a long way to run). What I'd really like to do is attach GPS transmitters to their collars so I can find them when they are out. I know some companies (Garmin, Trax) do them, but they're expensive and I'd also like to learn more about electronics and how to track them with a Raspberry Pi if possible.
So my questions are:
1) has anyone done this?
2) does anyone know of any kits that'll help?
3) are there kits that will either give me real-time tracking or tracking on-demand (through a SIM card which seems to be a popular solution)?
Thanks in advance.