Using the System
This guide explains how to boot and use the system.
If you haven't installed the system yet, please refer to the Install System tutorial to install the system based on your boot media.
Booting the System
Install the boot media in the corresponding slot on the motherboard, then power on the board using the power adapter to start the system.
If you have multiple boot media installed on the motherboard, the system will boot in the following priority order (Note: UFS module boot is currently not supported):
MicroSD Card > Onboard eMMC > UFS Module (Not Supported) > NVMe SSD
Note: You can remove the higher priority boot media to force the system to boot from a lower priority media.
During normal system boot, the Radxa CM4's LED will light up green when powered on. After the system starts running, it will turn off for a few seconds, then the CM4 IO board's power indicator (red) will light up, and the user LED (green) will blink along with the CM4's LED (green).
System Information
When using our provided system image, you'll need to log in with the following default credentials on first use:
- Debian Linux
Username: radxa
Password: radxa
Using the System
This section provides recommendations for both display and headless modes to help you get started with your Radxa CM4.
Display Mode
Display mode refers to connecting the motherboard to a monitor using an HDMI cable to display the system interface and operate through a graphical user interface.
This method is relatively simple to operate, allowing users to perform graphical operations.
Headless Mode
Headless mode refers to operating the system without a monitor. It is recommended to use serial debugging or SSH for remote login and control.
Requires connecting the motherboard to a PC using a USB-to-serial cable or USB-to-TTL module to log in to the system via serial connection.
Requires configuring the SSH service, connecting the motherboard to a network, and ensuring it's on the same local network as your PC to log in via SSH.