For those on iOS, I created a Siri Shortcut/WebCORE combination where you select from a list of speakers, then enter the text you want it to speak. It uses the “Execute Endpoint” integration in WebCORE.
First, the piston:
Once you create the piston, copy the piston id, and follow the instructions under “Executing Endpoints” under Settings > Integrations in WebCORE to obtain the endpoint url.
And the Shortcut:
Here’s an iCloud link for the Shortcut. Don’t forget to rename the devices in the Shortcut and match them exactly to the names in the “If” section of your WebCORE statements. Note also that the variables don’t need to match your Echo device names in SmartThings. Make sure you paste your WebCORE endpoint URL in the URL field.
This should also work with other TTS speakers like Lannouncer. Just make sure you replace the “SetVolumeSpeakAndRestore” command to “Speak” for devices that don’t support that capability.
Enjoy!