I want to send SMSs in PDU mode. I have checked the spec for my modem, and it supports PDU mode.
I have developed a PDU encoder and decoder, but now I do not know how to send data to my modem. I tried these AT commands:
AT
AT+CMGF=0
after sending these commands I sent the PDU data like this:
AT+CMGW="16079189390500410011000C918939050000000000AA02E834"
I have checked the correctness of this PDU using this online tool :
http://www.twit88.com/home/utility/sms-pdu-encode-decode
but after sending it via the AT command, the modem hangs.
Is this the right way to send SMS PDUs? I searched on Google and can not find useful information.