harryhancock / esp32objectdetector

Object detection up to 3m using HC SR04 ultrasonic sensor and Heltec ESP32 V2 board

ESP32ObjectDetector

This is an object detection hardware project which measures the distance to objects using an ultrasonic sensor and measures gyroscopic axis using the MPU-9250 sensor. I have included the C++/Arduino code in this repo.

Construction

• I calculated the distance by measuring the time taken between sending and receiving a pulse from the ultrasonic sensor
• I was inspired by the MiniRadar project from InterestingEngineering
• I have applied this in my SmartUAV project as a rangefinder up to 3m on the drone, to detect solid objects such as walls, feedback the distance to the flight controller and adjust course.
• The gyroscopic and accelerometer measurements from the MPU-9250 can assist in correct flight by making sure the drone moves away from the object in the correct direction and orientation respective to the ground

Learning outcomes

• Used an algorithm to detect and monitor the distance to objects using an ultrasonic sensor
• Feed this information back to raspberry Pi in SmartUAV project: www.github.com/harryhancock/SmartUAV

Components

• HC-SR04 utrasonic sensor, detects solid objects up to 3m
• Heltec ESP32 v2 to run the c++ code

Updates

Acknowledgments

• MPU9250_asukiaaa
• Arduino
• Platform.io