SKU: SENS-0103
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Holybro H-Flow Optical Flow and Distance Sensor Module - DroneCAN, Pixhawk 4-Pin

₹15,529.00 (Inclusive of all taxes)
Out of Stock

The Holybro H-Flow is a high-integration sensor module combining an optical flow sensor, a long-range ToF distance sensor, and a 6-axis IMU. It communicates via DroneCAN over a Pixhawk-standard 4-pin CAN interface, providing precise motion tracking and altitude data for UAVs and robotics in GPS-denied environments.

Features

  • Integrated PixArt PAA3905E1 optical flow sensor for precise 2D motion tracking.
  • Broadcom AFBR-S50LV85D ToF sensor measures distances from 80 mm to 30 meters.
  • TDK InvenSense ICM-42688-P 6-axis IMU (accelerometer + gyroscope) for enhanced motion sensing.
  • DroneCAN protocol support via 4-pin CAN connector for robust Pixhawk integration.
  • Built-in IR LED enables reliable operation in low-light conditions (>5 lux).

Out of stock

Description

The H-Flow module integrates three distinct sensing technologies into a single compact unit. The PixArt optical flow sensor uses image correlation to detect lateral movement relative to the ground, while the Broadcom ToF sensor employs infrared time-of-flight principles for accurate, direct distance measurement. The integrated TDK InvenSense IMU provides inertial data to complement and stabilize the optical flow and ranging outputs.

Designed for professional UAV applications, the module communicates via the DroneCAN protocol, ensuring robust, low-latency data transmission to compatible flight controllers like Pixhawk. Its lightweight, shielded casing and included mounting hardware facilitate easy integration into airframes, supporting precise navigation, position hold, and obstacle avoidance in both indoor and outdoor environments.

Key Features

  • Triple-sensor fusion: Optical flow, ToF ranging, and 6-axis inertial measurement.
  • Long-distance ToF capability with a 12.4° x 6.2° field of view for targeted ranging.
  • Wide 42° optical flow FOV for robust ground feature tracking across surfaces.
  • Low-light optimized performance enabled by an integrated infrared illuminator.
  • Standardized 4-pin GH connector (VCC, GND, CAN_H, CAN_L) for plug-and-play Pixhawk compatibility.
  • Lightweight, anodized aluminum casing for durability and EMI shielding.
  • Operates from a single 5V DC supply, typical for UAV power systems.
  • Includes M2.5 mounting screws and locknuts for secure mechanical attachment.

Applications

  • Precision hover and position hold for multirotor drones in GPS-denied areas.
  • Obstacle detection and terrain following for autonomous UAV navigation.
  • Indoor robotic navigation and SLAM (Simultaneous Localization and Mapping) systems.
  • Altitude estimation and ground proximity sensing for VTOL (Vertical Take-Off and Landing) aircraft.
  • Motion tracking and stabilization for camera gimbals and robotic platforms.

Technical Specifications

Model / Part NumberH-Flow
Rated Supply Voltage5 VDC
Optical Flow SensorPixArt PAA3905E1
Optical Flow Field of View42°
Distance SensorBroadcom AFBR-S50LV85D (ToF)
Distance Range80 mm to 30 m
ToF Field of View12.4° x 6.2°
IMUTDK InvenSense ICM-42688-P (6-axis)
Communication ProtocolDroneCAN
Connector4-pin GH (Pixhawk CAN)
Low-Light Performance>5 lux (with IR LED)
Dimensions (L x W)39 mm x 25.5 mm
Weight (with case)15.2 g

Frequently Asked Questions

What flight controllers is the Holybro H-Flow compatible with?

The H-Flow is designed for seamless integration with Pixhawk-series and other DroneCAN-enabled flight controllers. It uses a standard 4-pin GH connector (VCC, GND, CAN_H, CAN_L) for plug-and-play connectivity. Ensure your flight controller's firmware is configured for DroneCAN peripheral detection and that the CAN bus is properly terminated.

What is the minimum lighting condition required for the optical flow to function?

The integrated PixArt optical flow sensor requires ambient lighting greater than 5 lux for reliable operation. The module includes a built-in infrared LED to illuminate the surface in low-light or dark environments, ensuring consistent performance indoors or at night without relying on visible light.

How do I mount and orient the H-Flow sensor on my drone?

Mount the sensor securely to the airframe using the included M2.5 screws and locknuts, ensuring it has a clear, unobstructed view of the ground. The optical flow and ToF sensors should face downward. Avoid mounting near sources of vibration or heat, and ensure the cable is strain-relieved to maintain a reliable CAN bus connection.

Can the H-Flow's distance sensor measure short-range objects?

Yes, the Broadcom AFBR-S50LV85D ToF sensor has a minimum measuring distance of 80 mm (8 cm). It provides accurate ranging from this short range up to 30 meters, making it suitable for both altitude hold and close-proximity obstacle detection. The narrow 12.4° x 6.2° FOV helps isolate the target.

What power supply does the H-Flow module require?

The module operates on a 5V DC supply, typically provided by the Pixhawk flight controller's CAN port or a regulated 5V BEC. Ensure your power source can deliver stable 5V power, as voltage spikes or noise on the supply line can affect sensor performance and CAN bus communication stability.

Package Includes

  • 1 x Holybro H-Flow Sensor Module
  • 1 x 4-pin GH Cable
  • 2 x M2.5 Screws
  • 2 x M2.5 Nylon Locking CubePilot Nuts

Additional Information

Weight 0.0152 kg
Dimensions 3.9 × 2.55 cm