Holybro PMW3901 Optical Flow Sensor
£24.90 Inc. VAT
An Optical Flow Sensor can be used to help your drone maintain a position lock, without using GPS.
In stock|Next shipping: 16/03/2026
This sensor works the same way as an optical mouse. It uses a low-resolution camera and some clever algorithms to detect motion of surfaces, helping your drone maintain position without GPS by looking for x/y motion of the ground below!
The Holybro PMW3901 Optical Flow Sensor is a UART version of PMW3901 module with built in BEC. It comes pre-solder with 6pin JST GH connector made to connect right to TELEM ports on most flight controller. Compatible with PX4 (PX4 Guide) & Ardupilot (Data format same as discontinued product CX-OF).
- Dimension: 14x11x5mm
- Weight: 0.6g
- Interface: UART
- Baud rate: 19200
- FPS: 95hz
- Power: 2.0~3.6V
- Current: 10mA
Data Format:
- byte0: header (0xFE)
- byte1: number of data bytes (0x04)
- byte2: x-motion high byte
- byte3: x-motion low byte
- byte4: y-motion high byte
- byte5: y-motion low byte
- byte6: checksum
- byte7: surface quality
- byte8: footer (0xAA)
Included:
- 1x PMW3901
- 1x GH6P 170mm Cable(installed)
- 1x TPU Protective Case Shell
Questions and answers of the customers
-
what is the maximum working height
-
A
Hi, Holybro don't provide that information, but other PMW3901-Based flow sensors usually operate between 1-4M max: https://docs.px4.io/main/en/sensor/pmw3901.html
SHIPPING & DELIVERY
We are based in the UK and ship to most destinations worldwide.
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Shipping to the UK
- Order before the daily dispatch cutoff for same day dispatch.
- FREE delivery available on qualifying orders over £99 (under 1kg).
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