I am hoping for help (lots of it) with a project.
I operate/manage/own an FM voice amateur radio repeater on the 70cm/440Mhz band. It is on a rack in a server room, so I have computing power and Internet access.
I would like to be able to send SMS or email messages that will then be converted to voice and transmitted, some at regular intervals and others in response to a repeater user's entry of a series of DTMF tones.
The repeater has audio in and out and a line brought low will switch it from receive to transmit.
I looked around and see some speech synthesizer shields, but what I found sounded like 1980's robot voices. Anything out there more human sounding?
I don't have much Arduino experience, so I need lots of help.