Features:
Requieres the use of an 16x2 LCD
Operating Voltage:5V
Integrate a potentiometer for adjusting the backlight
Has 5 programmable buttons and 1 reset button
Expanded available I/O pins
Expanded Analog Pinout with standard DFRobot configuration for fast sensor extension
Pin used:
D4-D7 -> LCD Data transmission
D8       -> Reset pin
D9       -> Enable pin
APC&BT pin header for connecting wireless devices, directly compatible with:
APC220 Radio Communication Module
DFRobot Bluetooth V3
Dimension: 80 x 58 mm(3.15x2.28")