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Thanks sokrad for your reply, i found problem, problem is because of UART pin connecttion, on lpc1768 board and sım900 board pin connection UART RX and TX is canghed and in cable i used dont converted RX to TX so pin connection is not correct after i changed it problem is solved,
Anybody help please,
I am work with SIM900 module, and i send commands with lpc1768 over UART but i see every i send command comeback to me,
for example,
I send,
"ATE0\r\n" it send me same string
"AT+CPIN?\r\n" it send me same string,
which command i send it send me back,
But when i send...
Anybody help please,
I am work with SIM900 module, and i send command with lpc1768 over UART but i see every i send command comeback to me,
for example,
I send,
"ATE0\r\n" it send me same string
"AT+CPIN?\r\n" it send me same string,
which command i send it send me back,
But when i send...
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