Support [ and ] characters in PDU mode

Question

I am writing application in nodejs for sending and recieving sms in PDU mode.I use wavecom GSM modem(7-bit encoding) to send sms. It also support 8 bit(AT+CSMP=1,167,0,8) encoding scheme.

I can send alpha numeric character properly.But I can't send some character like ([,],| etc).

Here string :

AT+CMGS=14    
0001030C911989890878800004015B

Text String : [

But I recieve some junk character. Any Idea?

And how to send multipart sms. I have refer this, and this but I does not get desired output. can anyone suggest 8-bit(7-bit encoding scheme) text encoding scheme? Please Help me...

Answer 1

Thanks,

Finally I got the answer :)

This characters([,],|) are encode as two characters like

[ is encode as 1B1E (Combination of escape character and < sign)

] is encode as 1B20 (Combination of escap character and > sign)

So whenever I fond such characters I replaced it with corresponding value then I use 7 bit encoding. It's Work good...

So my encoding string for [ is

> AT+CMGS=15
> 0001000C911989890878800000021B1E

And for "[hello]"

> AT+CMGS=21
> 0001000C911989890878800000091B1EBACC66BF373E

Thanks once again..