通过手机蓝牙串口，根据手机蓝牙界面给蓝牙模块发送指令，单片机解析指令，调节pwm输出，来调节灯光的亮度，模式切换-Through the mobile phone Bluetooth serial port, according to the mobile phone Bluetooth interface to send commands to the Bluetooth module, SCM resolution instructions, adjust the PWM output, t