The PMW3901 is an optical flow sensor often used in drones and robotics to detect motion relative to the ground. It helps maintain a steady position, especially when GPS signals are weak or unavailable. This guide explains how the sensor works, its features, and how to use it with an ESP32. It also includes examples for visualizing motion on a web browser and an OLED display.
What is the PMW3901 Optical Flow Sensor?
The PMW3901 is a compact sensor that detects movement by tracking patterns in grayscale images. It does not provide absolute position data but measures how much and in what direction the surface underneath has shifted.
Common PMW3901 Modules
1. Pimoroni PMW3901 Pinout
2. Generic PMW3901 Module Pinout
Applications of the PMW3901 optical flow sensor with ESP32
- Indoor Navigation
- Position Holding in Drones
- Autonomous Robots
- Gesture Recognition Systems
The PMW3901 is a reliable optical flow sensor suitable for indoor drones and small robots. It provides real-time X/Y movement data, uses low power, and can be integrated with ESP32 using SPI. Visualization on a web interface or OLED display helps in testing and understanding motion detection.
For in-depth explanation and code : Interfacing PMW3901 Optical Flow Sensor With ESP32
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