In addition to deciding if, say, a strawberry is good or not, they also have to sort them by color. [Pmalfa31] applied an ESP32 and machine learning to grading tomatoes. The system knows in advance if you are processing standard tomatoes or cherry tomatoes and uses two different sets of learned data depending on which you select. It knows the approximate size of the tomato, so the code notes if the fruit seems too big for a cherry tomato or too small for a standard tomato. If you want to try it yourself, there is a simulator on the web available, so you don’t even need any hardware or tomatoes to try it.