Electronic plumbing fixture fitting including learning system and reference system

The present invention provides an electronic plumbing fixture fitting including a learning system and a reference system. The electronic plumbing fixture fitting includes a user input module and a processor. The user input module includes a mechanism to receive from the user numerical value(s) of parameter(s) for water to be delivered through a discharge outlet of the electronic plumbing fixture fitting (e.g., a temperature) and a mechanism to deliver to the user the numerical value(s) of the parameter(s) via the water delivered through the discharge outlet of the electronic plumbing fixture fitting. Additionally, the processor includes a mechanism to learn a range of the numerical value(s) of the parameter(s) from a minimum value of the parameter to a maximum value of the parameter (e.g., from a lowest achievable temperature to a highest achievable temperature).