In some cases, You will need to log out and log in again for this change to take effect. In fact, its quite possible the proprietary driver is the reason its not showing up correctly as a serial port. NOTE: where USER is NOT your linux user name keep as it is. Linux has had built-in support for CP2102 for a long time, so if your Ubuntu versions is less than 7-8 years old then it doesnt need a proprietary driver. Now we just need to add our user to the group: The data we need is “dialout” (is the group owner of the file). The “0” at the end of USB might be a different number, or multiple entries might be returned. It might happen that when you upload a sketch – after you have selected your board and serial port -, you get an error Error opening serial port … If you get this error, you need to set serial port permission.Ĭrw-rw- 1 root dialout 188, 0 5 apr 23.01 ttyUSB0 Actually, this very problem comes up whenever you want to access a (virtual) Serial COM port on Linux. ![]() Same as with the NodeMCU ESPlorer IDE, etc. On Linux (Ubuntu), Arduino IDE will not be able to upload sketches (or communicate with the board at all) if you don’t change permissions on /dev/ttyUSB0 appropriately. Question: Getting permission “error: cannot access /dev/ttyUSB0”Īnswer: Just open terminal ( Ctrl+Alt+T) and type this command and enter root password
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