PDF] Kalman Filter Algorithm Design for HC-SR04 Ultrasonic Sensor Data Acquisition System | Semantic Scholar
GitHub - MrNerdy404/HC-SR04_Filter: Custom noise filter function for operation of SR04 ultrasonic sensor in Arduino. Limits maximum detection range, establishes wide range sensing of object/target, and establishes target ranges/sensor parking range
Emil's Projects & Reviews: Making a better HC-SR04 Echo Locator
ESP32 with HC-SR04 Ultrasonic Sensor with Arduino IDE | Random Nerd Tutorials
GitHub - sparkfun/HC-SR04_UltrasonicSensor: Arduino example code for the HC-SR04 ultrasonic ranging sensor.