How to send SMS messages in Cyrillic via arduino in PDU format?

Question

Arduino

Hello,
Please help with a working code how to send SMS messages via arduino in Cyrillic in PDU format. I found one option on the Internet , but it does not work for me.

Thank you in advance!

Answer 1

SendSMS_PDU_Part_1.pdf
Send_SMS_PDU_Part_2.pdf
Here is a very handy manual describing the format.
Wrote modules for PHP and node.js