Luckfox Forums

By default, RNDIS and ADB are enabled on the Luckfox Pico Max.
I would like to know how to configure the USB Gadget to enable ACM.
Even after changing the setting to ACM_EN=on in /etc/init.d/S50usbdevice and rebooting, ACM is still not enabled.
I would appreciate advice from anyone who has successfully enabled and used ACM.

Hello, since the ACM function is not enabled by default, you need to go to the kernel to enable it manually, the location is as follows: Device Drivers > USB support > USB Modem (CDC ACM) support && > Device Drivers > USB support > Search (ACM) > USB support > Search (ACM) > USB Gadget functions configurable through configfs > Abstract Control Model (CDC ACM) Once done, recompile and download to see the /dev/ttyGS0 device.

Forgot one step, you also need ACM_EN=on in /etc/init.d/S50usbdevice to turn it on, then you can see the virtual serial port in the computer device manager

Thank you for explaining how to enable the ACM functionality.
After following the procedure, I was able to confirm that it is working properly.