DIY Projects

HC-SR04 sensor ultrasonic distance measurements for Arduino, ESP8266, ESP Easy, Raspberry Pi projects

ultrasonic module hc sr04 distance measuring transducer sensor 1 1
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Last Amazon price update was: 8 August 2022 3 h 09 min
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The HC-SR04 sensor allows ultrasonic distance measurements between 2 and 450cm. It is a sensor widely used in robotic and RC projects based on Arduino, ESP8266, Raspberry Pi. It is also supported by ESP Easy firmware for ESP8266 WiFi modules.

The HC-SR04 has 4 pins. Two pins for the power supply (+ 5V, GND), a Trig Input pin (trigger input) and an Output pin (or Echo for some manufacturers) of the PWM digital signal. The output will deliver a pulse train proportional to the measured distance.

Technical characteristics of HC-SR04

HC-SR04 sensor ultrasonic distance measurements offers

ESP Easy compatible sensors and actuators offers

  • This product is available at Ebay, Banggood,
  • At you can purchase 1pcs Ultrasonic Module HC-SR04 Distance Measuring Transducer Sensor for Arduino for only $1.03, which is 95% less than the cost in Banggood (CHF 21.53).
  • The lowest price of Geekcreit® Ultrasonic Module HC-SR04 Distance Measuring Ranging Transducer Sensor DC 5V 2-450cm was obtained on 9 August 2022 3 h 02 min.


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