GSM controller...

The real nasty part starts here!!

In order to wirelessly control the generator I need the microcontroller to be able to recognize the massage (SMS) received from the authentic user.

Then in order to warn the user, I need the microcontroller to be able to send warning/failure massage to the user autonomously.

STEP 1

I needed a mobile which supports "AT-Commands" and which is compatible with a serial cable. After a lot of search, I finally got "Samsung C-130" along with a serial cable.

It cost me 800Rs. for the cell phone and 120Rs. for the cable.. ;)

STEP 2

Now I needed to make sure of the mobile operates properly with AT-Commands.
So I hooked up the mobile with my PC via serial port and sent commands through Hyperterminal at a BAUD rate of 4800bps and without any flow control.

BINGO... It worked out perfect at the very first try !!

continued in next post...