This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Able to send many time but able to receive only once

sir myself varun
I m able to send AT command through micro controller(PIC) any time to gsm modem but i m able to receive once through modem.Modem is not transmitting next time.
problem is that i dont have manual of modem.
And modem donot have flow control option also.