i'm trying to add my user to ttyACM0, and it says not found. I accessed it about 30 minutes ago

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votes

terminal

I'm new to linux so excuse my lack of terminology. I'm having issues with selecting a com port from arduino IDE. I followed the arduino website installation and tried to access ttyACM0 because that's what the tools>port originally had. I tried giving my user access to the port using the sudo usermod -a -G dialout and then restarted my computer. When I opened up the IDE the "port" selection was greyed out and I cannot select anything. Tried bouncing the cable around to different ports and same result. Did I somehow remove my users permissions for the com ports, and how might I fix this?

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linuxarduinoserial-porttty
just an update to the situation, as it turns out the board itself was bricked. I could use another Arduino as a programmer to fix that separate issue but both happened at the same time so im not sure how their related but i dont think its coincidence. – Damon Reddy

1 Answers

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I faced a similar issue some days ago. Somebody else might find useful executing this command:

ls /dev/tty*

before and after connecting your microcontroller by USB.

Check the new entry that may appear.

When you get that entry (Arduino ide may show it in tools-port), proceed with these:

ls -l {your port}

for example /dev/ttyUSB0 That should diplay something like this:

crw-rw---- 1 root uucp 188, 0 ene 21 02:35 /dev/ttyUSB0

The only part that matters is the one that shows uucp, the group.

Bearing that in mind, continue with:

sudo usermod -a -G {the previously displayed group} {your user}

Finally, log out and log in again to make this change effective