Open-At for beginners

Hi all

I’m new on this Open-At, I need some advice where to start. I always wanted to build a home base security system where I can control it remotely by gsm system. I came across with this magnificent Open-At where it has it’s own cpu.

Now I don’t know which one will be better for me as a beginer which it has it’s own cpu, I/O pin may be digital etc

You can email me direct

Thanx in advance

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Try “Hello world” first.