May 5, 2011 #1 L lkjhgf Junior Member level 3 Joined Mar 31, 2009 Messages 29 Helped 1 Reputation 2 Reaction score 1 Trophy points 1,283 Activity points 1,483 My program sequence AT+CPIN? AT+COPS? AT+CMGF=1 AT+CMSS=1 (as the msg to be sent is saved in this particular location) With SIM 300 the AT commands works fine and msg is sent but when the same commands are used for SIM900B it sends back "ERROR" :???: Please let me know what could be the problem
My program sequence AT+CPIN? AT+COPS? AT+CMGF=1 AT+CMSS=1 (as the msg to be sent is saved in this particular location) With SIM 300 the AT commands works fine and msg is sent but when the same commands are used for SIM900B it sends back "ERROR" :???: Please let me know what could be the problem