Hi, i am trying to send AT commands to a k300 sony erricsson cell phone and then reading the response. Now i have done the sending part which is to send commands to the cell phone and is working perfectly but i want to see the response, i.e "OK", to be saved in a variable or something. I tried the uart method and serial transfer direct method with own functions method and in both i can transmit the data but never receive the "OK" Can anybody please help me.
Have you checked with a scope if the module sends out an OK, or if the OK gets stuck because a handshake signal doesn't give the phone a go-ahead to send?
Look at the logic levels (or existence of pulses) on all signals when connected to the PC. Compare with the setup where you use your microcontroller.