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Description
Holybro H-Flow (Optical Flow and Distance Sensor Module)Empower your drone with precision navigation using the Holybro H Flow a compact, all in one optical flow and distance sensor module built for professional UAV developers and demanding industrial applications. This advanced module integrates a PixArt PAA3905E1 optical flow sensor, a Broadcom AFBR S50LV85D LiDAR rangefinder, and an InvenSense ICM 42688 P 6 axis IMU into a single lightweight unit. The result is high accuracy motion tracking and altitude
Empower your drone with precision navigation using the Holybro H-Flow - a compact, all-in-one optical flow and distance sensor module built for professional UAV developers and demanding industrial applications. This advanced module integrates a PixArt PAA3905E1 optical flow sensor, a Broadcom AFBR-S50LV85D LiDAR rangefinder, and an InvenSense ICM-42688-P 6-axis IMU into a single lightweight unit. The result is high-accuracy motion tracking and altitude measurement for stable flight control, even where GPS might be unavailable. An onboard infrared LED further enhances performance by illuminating surfaces in low-light conditions, ensuring reliable optical flow data during indoor or night operations. If you're building autonomous drones for inspection, mapping, or any other mission-critical tasks, the H-Flow delivers the robust sensor data and easy integration you need for success.
Key Features & Benefits
- Integrated Optical Flow, Rangefinder & IMU: Combines three sensors in one compact module, reducing weight and wiring while simplifying installation, giving you more space and payload capacity for other critical components.
- PixArt Optical Flow Sensor - Precise Motion Tracking: Offers high-precision optical flow data for accurate horizontal motion tracking, functioning in very low light thanks to the onboard IR LED. Your drone can maintain stable positioning and smooth navigation in dimly lit warehouses or at dusk.
- Broadcom ToF Rangefinder - Reliable Distance Measurement: Delivers accurate range readings from as close as 80 mm up to 30 meters, enabling low-altitude hovering or high-ceiling indoor flights. Engineered to work under direct sunlight and on all types of surfaces, it ensures consistent performance indoors and outdoors.
- Infrared LED for Low-Light Performance: Actively illuminates the ground for the optical flow camera, significantly improving feature tracking in darkness. This means your drone can navigate in GPS-denied, low-light environments without losing positional accuracy.
- DroneCAN Protocol - High-Speed, Robust Communication: Leverages the DroneCAN protocol over its CAN bus interface, delivering reliable, high-bandwidth data transmission between the sensor and flight controller. Ideal for industrial UAV fleets and complex onboard networks.
- Pixhawk-Standard CAN Connector - Plug & Play Integration: Features a Pixhawk-standard 4-pin JST-GH CAN connector for effortless installation with a Pixhawk or any DroneCAN-compatible autopilot. Software-controlled CAN termination is included, and firmware updates can be performed easily through DroneCAN tools.
Built for Professional & Industrial UAV Applications
Engineered with professional drone developers in mind, the Holybro H-Flow brings industrial-grade sensor performance to your UAV projects. Its lightweight design adds minimal payload, making it ideal for agile drones and long-endurance flights. Whether navigating indoors, operating in tight urban spaces, or under dense foliage, the H-Flow module empowers your flight controller to hold position with centimeter-level stability and follow terrain or maintain altitude with confidence. From precision agriculture to mapping, security, and industrial inspection, the H-Flow module enhances navigation accuracy and safety, letting your drone fly smarter and more securely.
With the Holybro H-Flow optical flow and distance sensor module on board, you get a plug-and-play navigation solution that blends technical precision with proven reliability - exactly what professional UAV applications demand. Elevate your drone's capabilities and experience more stable, intelligent, and autonomous flights on every mission.
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
- 40mW 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)
Reference Links
Package Includes:
- 1x H-Flow
- 4-pin GH cable
- 2x M2.5 Screws
- 2x M2.5 Nylon Locking Hex Nuts
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 2046 reviews
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Product Reviews
★★★★★ 5
Great gift idea!
Denomination: 0, Design Name: You're the best. (Animated)
Always a great gift for anyone and easy to purchase and redeem.
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Reviewed in the United States on May 12, 2026
★★★★★ 5
Quick delivery, Naturally a great and easy gift.
Denomination: 0, Design Name: You're the best. (Animated)
Always a great way to say thank you.
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Reviewed in the United States on June 6, 2026
★★★★★ 5
A Foundling's Felicity
This book or novel or whatever you may deem fit to call it has so many points in its favour that it's difficult to know where to begin. I think a rundown of a few of the myriad of characters that delight me personally might do for starters:
Tom Jones - A young fellow with many "imperfections" if so they may be called, but a robust fellow with a "good heart." Prudence and what is commonly called virtue are not his strong suit - But may I remind the reader that virtue comes from the Latin word for "manliness"- Tom is certainly possessed of the word's etymological origins, if not of its modern usage (particularly in amorous matters)--And a good thing too, or we should have no story here to delight us!
Squire Western- Another rambunctious character, who, for me, typifies all that is Eighteenth Century England. Every time he appeared in this book, whether it was to comment on wenching, wine, or riding to hounds a smirk would immediately cross my face followed invariably by chuckling by the end of the chapter.
Henry Fielding - The author plays as much a part of the book as any of the characters with many prologues and prefaces and etc. For these, and for much of the rest of the book, I might add, the reader who has not had four years of Latin inculcated into him at an English boarding school would do well to buy the Oxford edition, which fully explains all the learned quotes - Also, as one who was thus inculcated but is inclined to laziness, the Oxford edition's notes prove extremely helpful also. Fielding also gives us a lively picture of the literary life of his time, which the Oxford footnotes do a deft job of explaining- In short, buy the Oxford edition.
This review can not be comprehensive. There are simply too many characters to even make a go at encompassing them all. I'm merely describing some of the, to me, more delightful ones.
The book as a whole is simply a joy to read, in its comic descriptions of all who will deign to admit that they are human, and of some priggish sorts who will not so deign. I can put it no better than Fielding Himself at the beginning of Book XV:
"There are a set of religious, or rather moral writers, who teach that virtue is the certain road to happiness, and vice to misery, in this world. A very wholesome and comfortable doctrine, and to which we have but one objection, namely, that is not true."
In short, this is a delightful ramble of a book which, while entertaining the reader not too attached to Sunday School, sheds light on how unvirtuous the virtuous can be, and how kind and good-natured the roguish can be as well as giving us as good a history lesson on the state of affairs in Eighteenth century England (with attention given to the Jacobite Rebellion etc.) as many a "proper" history does.
Who, I ask myself, would not delight in this book? ---Well...for the priggish, there's always Jane Austen.
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Reviewed in the United States on January 24, 2007
★★★★★ 4
The Sidekick in Early-Modern Literature.
Tom Jones is probably the most influential novel in English history, pioneering elements like complex characterization, social criticism and authorial interjection. But you already knew that.
What you want to know is, is this a good book for us in the 21st century. And here, it's not so clear. The dialogue is pretty brisk, and some of the exchanges (the stereotypical Whig Mrs. Western arguing with her Jacobite brother is a particular treat) are actually funny. The latter part of the novel evolves into a farce, with a dozen characters engaged in scheming against one another, while Tom and Sophia helplessly go along. Farce works better in drama, where it has a faster pace, but it's always a welcome mode of comedy. You don't see enough farces.
Some of the characters are evocative (why do I picture Blifil as looking like Ted Cruz?) but some are not: Dowling is just a lawyer, and Mrs. Miller is a good woman, like thousands who have come since, and that's all there is to it. It's not as if every character needs to, or can, be a fully realized person, but the parts of the novel spent with these human plot devices do feel mechanical.
But Mr. Partridge, Tom's traveling companion, is in a different category altogether, and he just poisons the parts of the novel that he features in (chiefly the middle third). Eighteenth Century literature has a depressing reliance on goofy loose-lipped sidekicks: Mr. Partridge, Hugh Strap, Humphrey Clinker, Andrew Fairservice, Friday. Sometimes they're servants, but sometimes they're just stupid friends.
Part of this must be practical: It's difficult to follow a wandering hero (and why are the heroes of these novels always wandering? But that's a different question altogether) without giving him a friend to talk to. Maybe early novelists had a hard time sketching characters who didn't have a way to discuss the ongoing action.
But mostly, I think this is the bad influence of Don Quixote, which was becoming increasingly popular in England during this period. Sancho Panza is OK, and he's certainly the funniest element of that leaden tome. But Mr. Partridge *is* Sancho Panza, cowardice, superstition and all, and one Sancho Panza was more than enough. You know? There's a limited number of things that a silly, selfless, lazy pal can do, and it's hard to read about the same old doofus, yet again.
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Reviewed in the United States on April 28, 2016
★★★★★ 5
Delightful and entertaining
Format: Kindle
314. The History of Tom Jones: a foundling by Henry Fielding (Novel-Audible/E Book-Fiction) 5* I read along with the Audible of the novel which I found a highly delightful and entertaining experience.
The narrator, Bill Homewood, who performed the audio version of the work was excellent doing the various characters as well as the invisible narrator (author) of the story. The Synopsis is as follows:
A foundling of mysterious parentage brought up by Mr. Allworthy on his country estate, Tom Jones is deeply in love with the seemingly unattainable Sophia Western, the beautiful daughter of the neighboring squire—though he sometimes succumbs to the charms of the local girls. When Tom is banished to make his own fortune and Sophia follows him to London to escape an arranged marriage, the adventure begins. A vivid Hogarthian panorama of eighteenth-century life, spiced with danger and intrigue, bawdy exuberance and good-natured authorial interjections, Tom Jones is one of the greatest and most ambitious comic novels in English literature.
It is rather brilliant, and there is no lack of shenanigans as we follow Jones through his history and the reader never knows when and where the author will abruptly go off on a tangent, told in a most eloquent manner, end with a flourish and no doubt tossed his quill down and took a bow. I am either taken in by some farce or thoroughly enchanted by this author. As Fielding is rather the loquacious writer this read comes in Audible time at almost 38 hours or roughly 1,000 pages but worth every minute spent on it.
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Reviewed in the United States on December 19, 2017