Has anyone tried using simple ultrasonic modules (HC-SR04 / similar) with ArduPilot for basic obstacle detection or landing assistance on multicopters? I found a practical tutorial on interfacing ultrasonic sensors with Arduino that explains wiring and timing https://www.theengineeringprojects.com/2015/02/interfacing-ultrasonic-sensor-arduino.html
I’ve seen Arduino threads and Raspberry Pi hobby projects where people combine multiple ultrasonic sensors or pair them with ESP32s for short-range obstacle sensing, but I’m unsure how well that translates to a flying platform with vibration, changing angles and noise. Has anyone here successfully tuned HC-SR04 or multi-sonar setups with ArduPilot in real flights and what practical tips (mounting, filtering, update rate) would you recommend?
You get what you pay for with those: HC-SR04
$6 worth of avoidance…
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