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I am interested in building a device like this (for other purposes and not for cats), but I have no idea how to put the hardware together or where to start. I have been thingking about bycicle security a lot lately and a tiny GPS + X (gsm, wifi, etc.) might me useful.

Could someone point me in the right direction? Where do I start?

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I love this thing. full computer, i.e. install ubuntu and go, yet it's way smaller and more powerful than a raspberry pi.

https://store.gumstix.com/index.php/products/620/

the problem you will run into is wifi eats a lot of power and makes a lot of heat

Thanks, I will have a look at it!

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