I tried to send "AT" command via UART at some baudrate to my Cinterion BGS2T, and I am always getting response "ERROR".
I get error on every AT command.
How can I know what is wrong, or how to check on what baudrate module works now?
I found where is problem, in my code on Beaglebone I did not send appropriately formated AT command like "at\cr\lf" and GSM module received something that is not recognized and always returned ERROR.
Now everything works OK!