Hello,
I found the TTS AT-Commands and would like to use it for a product. I´m Testing with the UMTS<E-EVB-KIT Quectel EG91 Revision: EG91EXGAR08A16M1G.
The Answers to all TTS related Commands are ERROR.
AT+QTTS=?
ERROR
Do I need to activate the TTS Feature? Or does this EG91 not have the feature? In the datasheet I did not find a note, telling me that this is optional.