AREF GND 13 12 11 10 9 8 7 6 5 4 3 2 1 0

RESET 5V 3.3V GND GND VIN A0 A1 A2 A3 A4 A5

RS RW E D0 D1 D2 D3 D4 D5 D6 D7

HC-05

GND VCC RX TX

Grove - Serial Bluetooth v3.0

1: 3.3V 2: EN 3: SVP 4: SVN 5: 3.4 6: 3.5 7: 3.2 8: 3.3 9: 2.5 10: 2.6

11: 2.7 12: 1.4 13: 1.2 14: GND 15: 13 16: SD2 17: SD3 18: CMD 19: 5V