Need Guru Help Regarding Micro-Controller + Wireless

You have a point voodoo

But its not BT so - the computer would need a tranciever too no?

However, I bought 4 msp430s  

So maybe the least expensive robust solution is :

 $5 msp430 + Rogue’s Cheap BT find $10 = $15 per unit (woo hoo)

Seems a very “Swarmable” price