Quote Originally Posted by aruran
Sorry to ask you all again. I didn't quite get it Mr.kasamiko since the phone's voltages are little lesser

than 5V. So why the hell we should use max232 to connect to the pic. I didn't quite understand it. I thought

if I connect it to the PIC directly through the interface given http://www.atrox.at/datacable/dlr3/index.html

But I am not farely clear what pins I should omitt. I thought that the phone's MBUS and GND are the only pins connected. As posted by stu746 I didn't realy understand the circuit modification. Enybody please help me......? If you could send me the circuit for any nokia connecting to a PIC only would be of immense help.
I will be greatful to you all

regards
aruran
MAX232 was used on that circuit since it was designed to be used for PC. If you're planning to use that as stand-alone on Nokia's like 6210, you can omit MAX232..
I have a circuit to be connected for 6210 but I dont have a code for PIC to have it receive an SMS then activate a relay.
What I need is a PIC16F84 with 8 mhz xtal and can drive a 4 relay when it received an SMS command..
I know sa AT commands for Nokia but don't know how would I start it..
Any sample codes will be appreciated.
TIA