I’ve set up the playSMS form https://www.howtoforge.com/tutorial/how-to-install-raspberry-pi-smsserver/#playsms.
Everything works fine with my raspberry pi and my medion umts stick.
I can receive and send sms via playSMS.
No i search for a solution like this -> Incoming SMS from control center-> Broadcast the sms to an group in phonebook or the whole phonebook.
We would like to send our sms from firefighting control center to all firefighters.