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ProtoPLAY!
ESP32 + Ultrasonic Sensor = Smart Distance Meter!
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办美国文凭加拿大文凭澳洲文凭英国文凭学位证毕业证成绩单
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![[DEMO] Headshot Tracking || OpenCV | Arduino](http://i.ytimg.com/vi/f2TUxoaKIsA/mqdefault.jpg "[DEMO] Headshot Tracking || OpenCV | Arduino")
