With SmartThings the use of the Minimote is a little bit special, you will need to install a SmartApp called "Button Controller" for simple control and use over the scene buttons.
To install Button Controller
- Open up SmartThings App
- On the bottom menu, click on "Automation"
- At the top menu, select "SmartApps"
- Click on "+ Add a SmartApp"
- Scroll to the bottom by swiping up and select "More"
- Then Select "Button Controller"
- Select your button device, while the SmartApp will go through button 1 - 4 in order.
Button 1 = Top left
Button 2 = Top Right
Button 3 = Bottom left
Button 4 = Bottom right.