> That is going to make a pretty ambitious project

Flashing a LED (perhaps a power LED dimmer) or Hello World
on an LCD is more like a starter

I've done projects using both PIR and SMS and, whilst simple in
concept, they were not 'very simple' to implement

Not to say that the OP shouldn't have a go but I suspect there will
be an awful lot of Hello World steps along the way

Joe


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