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'''Documentation notice:''' This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.<br />
<br />
== Summary ==<br />
Concise technical guide for the OV9281-120 mono camera (1 MP, global shutter) for all Raspberry Pi boards. Covers CSI hardware connection, system configuration, libcamera commands and warnings.<br />
<br />
== Related products at JW Tech ==<br />
* [https://shop.jw-tech.eu/p/WSAL21797 WSAL21797 – OV9281-120 Mono Camera for Raspberry Pi, Global Shutter, 1MP]<br />
<br />
== Technical overview ==<br />
* Sensor chip: OV9281; supported on all Raspberry Pi boards; usable only with the libcamera driver.<br />
* Connection via the CSI port; insert the FPC cable with the metal side facing the HDMI or network port (depending on board).<br />
* Configure /boot/config.txt or /boot/firmware/config.txt (Bookworm): set 'camera_auto_detect=0' and append 'dtoverlay=ov9281' at the end of the file.<br />
* Start preview with 'sudo libcamera-hello -t 0'; close via Alt+F4 or Ctrl+C in the terminal.<br />
* Capture a still JPEG: 'libcamera-jpeg -o test.jpg -t 2000 --width 640 --height 480'.<br />
* Manually control exposure: '--shutter 20000 --gain 1.5' sets analog sensor gain; excess is applied as digital ISP gain.<br />
* Binocular arrangement on CM4 carrier boards or Pi 5: append 'cam0'/'cam1' to the dtoverlay lines.<br />
* Per FAQ: FOV approx. 97° horizontal and 56° vertical; fixed focus at approx. 0.7 m; lens has a 650 nm optical filter; MIPI CSI interface; PH1.0-15PIN FFC ZIP connector.<br />
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'''Commands and examples – verify before use:''' <br />
<syntaxhighlight lang="text"><br />
sudo apt-get update -y<br />
sudo apt-get upgrade -y<br />
sudo nano /boot/config.txt<br />
sudo nano /boot/firmware/config.txt<br />
camera_auto_detect=0<br />
dtoverlay=ov9281<br />
sudo libcamera-hello -t 0<br />
sudo libcamera-hello -t 0 --camera 0<br />
sudo libcamera-hello -t 0 --camera 1<br />
libcamera-jpeg -o test.jpg<br />
libcamera-jpeg -o test.jpg -t 2000 --width 640 --height 480<br />
libcamera-jpeg -o test.jpg -t 2000 --shutter 20000 --gain 1.5<br />
libcamera-hello --tuning-file /usr/share/libcamera/ipa/raspberrypi/imx219_noir.json<br />
libcamera-hello --info-text "focus %focus"<br />
</syntaxhighlight><br />
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== Notes and version constraints ==<br />
* Source material contains placeholders and incomplete sections; some command parameters may be version-sensitive – verify on the target system before running.<br />
* The config file path differs by OS version (Bullseye vs. Bookworm); using the wrong path prevents detection.<br />
* Fixed focus at approx. 0.7 m means shots closer than this distance will be out of focus.<br />
* The 650 nm filter limits the spectral sensitivity range; not suitable for pure IR capture without additional filtering.<br />
* No price, stock, warranty or certification information is present in the source – these values must not be stated here.<br />
<br />
== Source and revision record ==<br />
* [https://www.waveshare.com/wiki/OV9281-120_Camera OV9281-120 Camera - Waveshare Wiki]<br />
* Source revision: 87162<br />
* Captured: 2026-09-03T03:25:01+00:00<br />
* SHA-256: <code>a97620cba2b09ea4d606fde072f5de177f2d506336cd812ecd439252a961b49d</code></div>JWTechPublisher