To configure the Smart Smoke Sensor:
go to Home page (Active sensors page)
tap on the sensor you wish to configure
tap on the gear button located at the top right corner.

Give the sensor a name if you have more than one to know which sensor is sending alerts. Try not to have more than one sensor with the same name.
Here you can check:
Change the status of the sensor from Active to Deactive or Delete the sensor.
Save the changes you made.