AT+CMGS returns ERROR
at-command, avr, gsm, serial-port, sms
Solution
Command `AT+CSCS?` will answer You what type of sms-encoding is used. Properly answer is "GSM", and if not, You should set it by command `AT+CSCS="GSM"`.
And remember about "Ctrl+Z" (not "Enter") as a finish of sms text, please.
Problem
I am using SIM900 GSM module connect to my AVR Microcontroller. I tested it with FT232 to see transmitting data. First Micro sends AT it will response OK ``` AT OK AT+CMGF=1 OK AT+CMGS="+9893XXXXXX" returns ERROR and doesn't show ">" ``` Could anybody advise me what to do?