dropControllerV4 has a very handy Manual Drain function that does not require the app. Here is how to use it.
To enter Manual Drain click the SEL button.
The screen will change to the Manual Drain menu.
Click the SEL button to increment the valve. The valve number increments; 1,2,3,4,5,6,7,8. After valve 8, EXIT is displayed.
Pressing the SET button will open and close the currently selected valve.
To exit; press the SEL button until EXIT appears then click the SET button. You will return to the main display.
If the web app is open while using Manual Drain, the app will follow the dropController.
Manual Drain can only be used when there are no active drops.
Drops cannot be made while using Manual Drain
Valves automatically close when incrementing the valve number and on EXIT.