Upload Arduino sketch through HC-05 bluetooth module
pin connection: HC-05 Arduino Nano STAGE -> reset RXD -> 1(TX) TXD -> 0(RX) GND -> GND VCC -> 5V
Connect LED(with a 560 ohm resistor) on pin 8 to identify command receiving After upload sketch, using terminal tool(e.g. CoolTerm) to send command to HC-05