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Amazon.com: Tangyy 5pcs HC-SR04 Ultrasonic Sensor, Distance Sensor with Ultrasonic Transmitter and Receiver Module fit for Raspberry Pi,MEGA2560, Robot (Blue) : Industrial & Scientific
![python - Ultrasonic range sensor (HC-SR04) giving inconsistent readings on Raspberry Pi - Stack Overflow python - Ultrasonic range sensor (HC-SR04) giving inconsistent readings on Raspberry Pi - Stack Overflow](https://i.stack.imgur.com/1xv8s.jpg)
python - Ultrasonic range sensor (HC-SR04) giving inconsistent readings on Raspberry Pi - Stack Overflow
![GitHub - solacese/raspberry-pi-ultrasonic-sensor-mqtt: A demo app that integrates an HCSR04 proximity sensor on a Raspberry PI with an MQTT publisher GitHub - solacese/raspberry-pi-ultrasonic-sensor-mqtt: A demo app that integrates an HCSR04 proximity sensor on a Raspberry PI with an MQTT publisher](https://raw.githubusercontent.com/fivdi/pi-io/master/doc/hc-sr04-two-pin.png)