GND
SDA
SCL
5V
POT 4 (A3)
POT 13 (A12)
POT 3 (A2)
POT 11 (A10)
POT 5 (A4)
POT 8 (A7)
POT 7 (A6)
POT 12 (A11)
POT 1 (A0)
POT 2 (A1)
POT 9 (A8)
POT 10 (A9)
POT 6 (A5)
A16
PUSHBUTTON 1
PUSHBUTTON 2
PUSHBUTTON 4
SW1
MAX485 Module
J1
PUSHBUTTON 3