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HC SR 04 Ultrasonic Distance Sensor Module ESP32 Node MCU Development Board with Wifi and Bluetooth (CP2102 Driver 0 LE on a single 0 LE on a single chip eliminates the need for external RF modules 27 mm x 13 mm x 2 mm Pin Count 6 pins (VCC ```html HC SR04 Ultrasonic Distance Sensor Module Measure distances accurately from 2 cm to 400 cm using ultrasonic sound waves with the HC SR04 the most popular and reliable non contact distance sensor for Arduino
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