Turn off M4 Arduino core

Sometimes it may be convenient to disable the M4 core. Doing this, all the devices normally used by M4 can be used under Linux from the A9 core.

Possible use cases for disabling the M4 core are:

• you want to use of A0-A5 analog inputs from Linux;
• Arduino is not needed.

Using the Web Control Panel

You can disable the M4 core using the GUI provided by the Web Control Panel, in Configuration/Advanced settings.

Using the terminal/SSH

Disable the M4 Arduino core

sudo udoom4ctl disable

Enable the M4 Arduino core

sudo udoom4ctl enable

Get the M4 Arduino core status

sudo udoom4ctl status

After the status has changed, you need to reboot the board to initialize the setting that you configured.