I'm using java to communicate with a gsm modem (Siemens) using AT commands.
I set the encoding of modem to "UCS2".
When sending messages as soon as I send the phone number I get ERROR from the device:
AT+CSCS=UCS2
OK
AT+CSMP=17,167,0,8
OK
AT+CMGF=1
OK
AT+CMGS="0919xxxxxxx"
ERROR
HELP ME, PLEEEEEEASE! :(
3
votes
what the AT+CSCS=? command replies? Also the phone number shouldn't have the country code with the '+' symbol?
- André
+CSCS: ("GSM","UCS2") I tested both ways 91 style (+9xxx...) and 92 (09xx...).
- yashar
try with AT+CSCS="UCS2" instead of AT+CSCS=UCS2. I think it accept the command but is not a valid value without the quotes, so it gives error when you try to send with CMGS
- André
Thanks for your help, I still get ERROR, but I had to switch to sending sms in PDU format and it's working...
- yashar
Then add this as answer and mark as answered :)
- André
2 Answers
6
votes
I think you are encoding the <da> address argument to AT+CMGS incorrectly.
You refer to 91 and 92 style, but are you actually referring to the '81'/'82' format as explained in the Coding of Alpha fields in the SIM for UCS2 blog post about encoding as specified in 3GPP TS 11.11?
After you run AT+CSCS="UCS2" every single string must be encoded that way, so for instance to switch from UCS2 to UTF-8 would be AT+CSCS="005500540046002D0038".
Alpha fields with 80/81/82 encoding only applies to some cases, and not UCS2 encoded strings in general. In particular notice that the encoding of the string "UTF-8" in the above AT+CSCS command has nothing to do with this. That also applies to the <da> argument to AT+CMGS.
