I'm sorry for my bad english my mother tongue is dutch
For my school project i'm going to build a gsm system with an Arduino, and for this i'm using an arduino Uno r3 replica. But i need to connect a 4x4 matrix, a 16x2 lcd display, a gsm shield and 2 Signales to it so do i have enough pins for this on My Arduino? I know there is a method to connect the matrix with only 1 or 2 pins. But can i connect all of this to the Arduino without this matrix method?
This is a connection plan i found maybe this helps?