Indeed, only the heaters, lock, switch and thermostat can be detected by Google assistant while the list of Google 2016 and 2017 shows much more compatible devices.
For example,
We are in 2018, so normally, Google assistant support sensors, security systems, etc… since 2017 (see the list)
But when i watch in the google assistant smartapp in the smartthings app (see the second picture), i just can set switch, thermostat, lock and heater.
So i think smartthings is late
I am personnaly interesting to ask to google assistant my pool temp (via ds18b20) and from this year, ask for the blinds
So my question is : Is smartthings expected to work on it?