I have a problem with sending an SMS (even as multipart) with unicode and longer than 160 characters. When encoding Unicode_No_Compression and a message longer than 160 characters, I get an error in the logs:
Sat 2022/09/24 22:48:13 gammu-smsd[17769]: SMS sent on device: "/dev/ttyUSB3" status=304, reference=-1 Sat 2022/09/24 22:48:13 gammu-smsd[17769]: Error getting send status of message: Nieznany błąd. (UNKNOWN[27])
I send text messages via a Huawei modem