三个HC06蓝牙芯片作为beacon安装在四周
ESP8266+振动片+声波传感器+眼镜 = 声波探测眼镜
ESP8266+振动片+声波传感器+拐杖 = 声波探测拐杖
Three HC06 Bluetooth chips are installed as beacons around.
ESP8266 + vibrationr + ultrasonic sensor + glasses Frame = Ultrasonic detection glasses.
ESP8266 + vibration + ultrasonic sensor + long cane = Ultrasonic detection cane.
