Hi Martyn, first I want to thank you for this project you shared ive manage to build and use it for a while now. im thinking if you can add Enable/Disable button for flash, camera and valves to the main screen of the app. this is when establish drops like the size of the column that we want only by looking at the drop, we can always turn off/on the camera and flash trigger through the app. thank you
This is not so easy to implement in software because of how the code works and not something I would probably add but you can put an off/on switch in line with the connection between the Arduino and the optocoupler or TIP120. This would then simply stop the trigger signal.