Holybro PMW3901 Optical Flow Sensor UART with BEC for PX4 & Ardupilot Drones

Introduction

The Holybro PMW3901 Optical Flow Sensor is an advanced UART module designed to significantly improve drone navigation and positioning capabilities. Featuring an integrated BEC and a standard 6-pin JST GH connector, it offers seamless integration with popular flight controllers like PX4 and Ardupilot. This sensor provides critical optical flow data, enabling more stable flight and precise maneuvering, especially in GPS-denied environments. It's an essential upgrade for serious FPV and UAV enthusiasts looking to push the boundaries of drone performance.

Key advantages

• High-performance optical flow sensing with PMW3901 sensor.
• UART interface for easy connection to flight controllers.
• Integrated BEC simplifies wiring and power management.
• Fast 95Hz update rate for real-time data.
• Extremely lightweight and compact design (14x11x5mm, 0.6g).
• Direct compatibility with PX4 and Ardupilot firmware.
• Provides crucial data for stable flight and precise positioning.
• Includes a protective TPU case for added durability.

Technical specifications

• Dimensions: 14x11x5mm
• Weight: 0.6g
• Interface: UART
• Baud Rate: 19200
• Max FPS: 95hz
• Power Supply: 2.0~3.6V
• Current Consumption: 10mA
• Data Format:
• Byte 0: Header (0xFE)
• Byte 1: Data Length (0x04)
• Byte 2: X-motion high byte
• Byte 3: X-motion low byte
• Byte 4: Y-motion high byte
• Byte 5: Y-motion low byte
• Byte 6: Checksum
• Byte 7: Surface Quality
• Byte 8: Footer (0xAA)

Applications

This optical flow sensor is perfect for advanced FPV drones, autonomous UAVs, aerial inspection platforms, and racing drones that require enhanced positional awareness and stability. It excels in applications where GPS signal may be weak or unavailable, such as indoor flight or navigating complex environments.

Compatibility

The Holybro PMW3901 is designed for direct connection to flight controllers supporting UART communication, including PX4 and Ardupilot. It uses a standard 6-pin JST GH connector and operates on a 2.0-3.6V power supply, making it compatible with most modern flight control systems.

FAQ

What is the Holybro PMW3901 Optical Flow Sensor used for?

The Holybro PMW3901 Optical Flow Sensor is used to enhance drone navigation and positioning accuracy, especially in environments where GPS signals are weak or unavailable. It provides crucial data for stable flight and precise maneuvering for FPV and UAV applications.

What flight controllers is the Holybro PMW3901 compatible with?

This optical flow sensor is compatible with flight controllers running PX4 and Ardupilot firmware. It connects via a UART interface, commonly available on most modern flight controller boards.

What are the key technical specifications of the Holybro PMW3901?

The sensor is extremely compact (14x11x5mm) and lightweight (0.6g). It operates via UART with a 19200 baud rate, offers a 95Hz update rate, and requires a 2.0-3.6V power supply with a low current draw of 10mA.

Does the Holybro PMW3901 sensor include a protective case?

Yes, the package includes a protective TPU case for the Holybro PMW3901 sensor, ensuring durability during installation and operation on your drone.

Where can I buy the Holybro PMW3901 Optical Flow Sensor with fast delivery?

You can buy the Holybro PMW3901 Optical Flow Sensor at HTDRONE. We offer fast shipping within Poland and reliable delivery to Ukraine and worldwide via DHL, ensuring you receive your FPV parts quickly.