alarm for home 2002, September Trading liberty for security after September 11. FPIF Policy eport. etrieved 8 July, 2007 at ollins, P. A. , icks, T. A.

We started off by setting the first four ports of PORTB as the inputs and the latter four ports as the outputs.

home wireless alarm systems

It is obvious what most sensors do, so we will only describe the main ones used in a basic system.