what I mean is - I have a project that require 9 digital inputs and use of Ethernet (keypad-7 ,Led-1,Button-1) from what I know, if I'm using Arduino Ethernet board I have 9 digital but I can't use pins 0,1,2 (the Ethernet use them) my question is - if I'm using Arduino Uno(that have 13 digital I…

how many digital IO I can use in Ethernet shield

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