LCD USB communication ![A usb/serial LCD]( This is on Arch Linux. I connected it and using dmesg I got the output: [ 78.637285] usb 5-2: USB disconnect, device number 3 [ 78.953772] usb 5-2: new full-speed USB device number 4 using uhci_hcd [ 79.110482] cdc_acm 5-2:1.0: ttyACM0: USB ACM device So using /dev/ttyACM0 I was able to send characters to it using `echo -en "t" > /dev/ttyACM0`, but almost straight away it displayed 'AT' which through trawling the internet is an attention command sent to modems. After a few seconds random text appeared and it became unresponsive. Is this due to the OS thinking this is a different device than it is? Is there a way to manually tell the system to leave this device alone and let it be communicated to through ascii only? Thank you in advance,

Using a reply to the original question, this can be fixed by using minicom, running:


sudo minicom -s


And setting the device to be used, saving the setup to dfl.

Thank you very much! Hopfully this will be useful for anyone else trying to debug this issue.