Out of the box, the Radxa Rock CM3 does not work with boards designed for the Raspberry Pi CM4. Here are the steps to get the most functionlity working on a CM4 board.
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Postinstall script to be used with Raspberry Pi's CM Provisioning System (https://github.com/raspberrypi/cmprovision)
This script has been tested with Raspberry Pi OS Bullseye edition realeased April 8th 2022 and after.
It takes advantage of the user configuration file.
This guide assumes that the raspberry pi is running and you can SSH into it.
Run sudo raspi-config change the hostname to make it easier to find on local network and reboot.
Open terminal and SSH using the hostname entered above ssh pi@hostname.local. If this doesn't wor, use your Pi's IP address.
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After burning the OS image to the microSD card, eject the card from the memory card reader and plug it in again.
Navigate to the /boot partition on the microSD card and create an empty file named "ssh" (no quotes). This file should not have an extension (no .txt needed). When you boot the Raspberry Pi, the OS will see this file and take it as a queue to enable SSH. This is helpful if you are not connect the Pi to a monitor/display.
Create another file under /boot. This file should be named wpa_supplicant.conf. Again, during boot, the Pi will use this file to configure WiFi options.
