You would need a TTS service installed ( VoiceRSS) and the spoken text can be played on all devices recognised as an audiosink ( Sonos speakers etc.), selecting “system speaker” would play it on all android devices running the android app. Please read Multimedia docs
Hello, I have read this.
Is it correct that it is not possible to use the voice output of text-to-speak on the smartphone with the OpenHAB app from the Google Store?