Bear in mind that the analog readings are not always consistent, which can lead to the occasional misreporting of a button press. If the keypad buttons of your shield give different analog readings, you’ll need to make changes to file LcdKeypad.h. There are numerous manufacturers of LCD keypad shields that have the same or similar pin connections, and you must ensure that the sample menu code uses the pin connections that are right for your shield. To keep things simple, all coding examples have been targeted to work with an R3 Arduino Uno/ Leonardo/ Mega2560, and an LCD keypad shield similar to one illustrated above. With our Arduino menu library, this independence is achieved by having the menu manager code use callback methods for handling user input and rendering the menu display. This is because there are many input and display devices available, and a generic menu system must be independent of whichever input and display devices you wish to use. If you have tried writing menu code for your Arduino projects, you will recognise the challenge in developing a generic menu system for an open prototyping platform. You may have used an electronic device with a small Liquid Crystal Display (LCD) which has a textual hierarchical menu system for setting device configuration parameters.
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