I am using a SIM900 GSM module to connect to my AVR microcontroller.
I tested it with FT232 to see the transmission data.
First Micro sends AT and it will respond OK
I tested it with FT232 to see the transmission data.
First Micro sends AT and it will respond OK
AT OK
AT+CMGF=1 OK
AT+CMGS="+9893XXXXXX" returns ERROR and doesn't show "> "
Can anyone tell me what to do?
command AT CSCS? Will answer what type of SMS code you use. The correct answer is “GSM”, if not, you should set it by command AT CSCS = “GSM”.
Please remember “Ctrl Z” (Not “Enter”) as the end of the SMS text.
I am using a SIM900 GSM module to connect to my AVR microcontroller.
I tested it with FT232 To view the transmission data.
First Micro sends AT and it will respond OK
AT OK
AT+CMGF=1 OK
AT +CMGS="+9893XXXXXX" returns ERROR and doesn't show ">"
Can anyone tell me what to do?
Command AT CSCS? Will answer what type of SMS code you use. The correct answer is “GSM”, if not, you should set it by command AT CSCS = “GSM”.
Please remember “Ctrl Z” (Not “Enter”) as the end of the SMS text.