i am using SIM800 GSM modem to interface with PIC18F4550 Controller for the sending and receiving msg/call. But here, i am unable to receive simple AT command also, so plz help me for the Code.
For the reference i am pasting my code plz help me out asap. Thanks in advance.
When you send AT command you have to send like "AT\r". Using your UART send character function make a send string function and send the AT\r command as a string and check for \r\nOK\r\n response.