H-Flow (Optical Flow and Distance Sensor Module)

Description

Overview
The Holybro H-Flow is a compact optical flow and distance sensor module that combines a PixArt PAA3905E1 optical flow sensor, a Broadcom AFBR-S50LV85D distance sensor, and an InvenSense ICM-42688-P 6-axis IMU. This all-in-one design simplifies installation, while the onboard infrared LED enhances visibility in low-light conditions.
The H-Flow features a Pixhawk-standard 4-pin CAN connector, ensuring seamless integration with Pixhawk-compatible controllers via the CAN port. Utilizing the DroneCAN protocol offers reliable and high-speed data transmission between the sensor and the flight controller.

Feature
Integrated Optical Flow and Rangefinder Module
PixArt Optical Flow Sensor for Accurate Motion Tracking
Broadcom ToF Sensor for Precise Distance Measurement
Infrared LED for Optical Low-Light Performance
DroneCAN Protocol

Specification
PixArt PAA3905E1 Optical Flow Sensor
Tracks under low light conditions of >5 lux
Effective Viewing angle up to 42°
Wide working ranges from 80mm up to 30m 
Up to 7.4 rad/s
40 mW 120° viewing angle IR LED built onto the board for improved low-light operation
Broadcom AFBR-S50LV85D Time-of-Flight Distance Sensor
Integrated 850 nm laser light source
Field-of-View (FoV) of 12.4° x 6.2° with 32 pixels
Typical distance sensing range up to 30m
Operation of up to 200k Lux ambient light
Works well on all surface conditions
Transmitter beam of 2° x 2° to illuminate between 1 and 3 pixels
InvenSense ICM-42688-P 6-Axis IMU
STM32F412CEU6 MCU
Pixhawk Standard CAN Connector (4 Pin JST GH)
Compact Form Factor
Software-Controlled CAN Termination
Weight: 15.2g (3.5g without casing)

Package Includes:
1x H-Flow
4-pin GH cable
2x M2.5 Screws
2x M2.5 Nylon Locking Hex Nuts

Reference Links
Setup Guide
Firmware Setup & Upgrade
Pinout
AFBR-S50LV85D Datasheet

Dimension With Case

PCB Only