ActcastOS 4 and ActcastOS 3 Support Timeline

This page was machine-translated. The Japanese page is the official version.

Thank you for using Actcast. This page describes the release of ActcastOS 4 and the end of support for ActcastOS 3.

New features in ActcastOS 4

ActcastOS 4 includes the following main features:

• Raspberry Pi 5 support
  • Raspberry Pi 5 is supported in addition to previously supported devices.
• 64-bit support
  • The OS is now 64-bit and can use more than 4 GB of memory.
• Improved application development
  • Enable Developer Mode to develop and debug applications directly on ActcastOS.
  • See the ActcastOS 4 application development guide for details.

ActcastOS 3 end of support

Support for ActcastOS 3 will end on December 31, 2026. The release and support schedule is:

OS	Version	Release date	End of support
ActcastOS 3	3.x.y	November 2024	December 31, 2026
ActcastOS 4	4.x.y	September 2025	To be determined

ActcastOS 4 caveats

• Raspberry Pi 3 Model B and Raspberry Pi 3 Model B+ are not supported by ActcastOS 4. See devices supported by Actcast.
• Support for VideoCore and ai cast was scheduled for December 2025. Until support is available, ActcastOS 4 cannot be used with VideoCore or to run and develop applications for ai cast.

Application development for ActcastOS 4

The main changes for applications targeting ActcastOS 4 are:

• Add raspberrypi-bookworm to target_types in .actdk/setting.json.
• For CSI cameras, unicam_isp_capture.UnicamIspCapture is not available. Use libcamera_capture.LibcameraCapture instead.
• RPi.GPIO does not work. Use rpi-lgpio to control GPIO.
• All installed binary packages are 64-bit.

See these implementations for ActcastOS 4 application development:

• libcamera: CSI camera application
• usbcamera: USB camera application

Use ActcastOS 4

Select ActcastOS 4 as the OS image when setting up a device. See Device Setup for details.

For instructions on upgrading from ActcastOS 3, see Upgrade to ActcastOS 4.