5V
GND
GND
6
GND
a4
Simplified Arduino Uno pinout for MobiFlight
11
9
8
7
10
13
12
Power
Ground
Input / Output pin
Analog capable pin
LCD display pins
PWM capable pin
Pin is not used in MobiFlight
A5
A4
5
4
3
2
A1
A0
12
A2
A3
A4
A5
LCD SDA
LCD SCL
3.3V