■ Step 1
Make sure your SwitchBot Hub Mini/Plus is connected to the Internet.
Then enable the Contact Sensor's cloud service.
■ Step 2
Open your Alexa App. Search "SwitchBot" skill.
Sign in to your SwitchBot account to enable the skill.
■ Step 3
Discover devices and you will find your Contact Sensor has been added.
■ Step 4
Add a routine and then follow the instructions in the Alexa app to finish setting the routine.