Operating system name and version - FreeBSD 11:
Version of smsd - 3.1.20:
Smsd installed from: sources / package repository / from elsewhere... - sources
Name and model of a modem / phone - Huawei:
Interface: serial / USB / some adapter... - USB
Hi!

How I can send USSD command in text? I know only this sequence - *100#

Thank you in advance!

Try this kind of modem settings:

regular_run_cmd = AT+CUSD=1,"*100#",0;
regular_run_interval = 600
regular_run_logfile = /var/log/smsd_regular_run.log

If you see an error in the log, you could try without the ending ,0;.

If you still get error, replace *100# with AA180C3602 and use a modem setting ussd_convert = 2.

See also this post: Sample config and script for regular_run and balance of prepaid SIM using USSD.

Hi!

It returns UCS encoded string.
Is it possible to decode in code?

OK +CREG: 1,"02C6","00000689" +CUSD: 0,"04110430043B0430043 D0441003A003100340036002C003800320440002C041B0438043C04380442003A0030002C0030003104400020",72 // $ø

By the way - your converter http://smstools3.kekekasvi.com/topic.php?id=288 works great.
I use USSD Entry/Display UCS2 encoding, pressing convert and recieve
USSD/User Data without length information Alphabet: UCS2 Баланс:146,82р,Лимит:0,01р Length: 27

with iconv -f UCS-2 -t UTF-8 i got some arabic symbols)

Iconv does not convert the string, because the string is not UCS2, it is hexadecimal represensation of UCS2.

Modem setting ussd_convert = 1 should do the job.

However, there is an active problem with balance queries in Russian Federation, probably elsewhere too. I'm working with it right now and likely the 3.1.21 version may have some enhancements for handling of ussd.

Hmmm.... Maybe I can get UCS to HEX conversion for each 0x hex byte in my sequence? Let's say, reinterprete your algo on PDU converter)

Sorry, I think that I did not understand your question, but did you try ussd_convert = 1 and did it work for you?

No, this setting makes nothing for me.
I meant, that maybe it's possible to repeat your code from PDU converter online http://smstools3.kekekasvi.com/topic.php?id=288

Of course it is possible to repeat the code from PDU converter, but I do not understand why. If you are sending balance queries with regular_run_cmd, smsd should convert the answer automatically.

And put the answer into the log? I see nothing... Will show you the output later.

Let's say - the same)

2017-04-28 23:49:29,5, huawei: CMD: AT+CUSD=1,"AA180C3602": OK +CREG: 1,"02C6","00000689" +CUSD: 0,"04110430043B0430043D04410 03A003100300035002C003500320440002C041B0438043C04380442003A0030002C0030003104400020",72

The code expects OK +CUSD: 2,"data... but CREG information is received after the OK and the code is not 2. This is why the answer is not recognized.

This likely is operator-depended issue, and I have to change the code to accept any variations. I can do it probably tomorrow, and I will post a notification as soon as the 3.1.21beta package is available for your testing.

thank you very much for your help!

3.1.21 is now available for download.

As you are running FreeBSD on Raspberry Pi, this version is important for you. See the src/Makefile, there are comments about FreeBSD.

Hi!

Thank you! Going to try tonight.