In this case, the error appeared on a Linux when trying to upload code due to the drivers not being installed and the root permissions.
language:bashĪvrdude: ser_open(): can't open device "/dev/ttyUSB0": No such file or directory You may receive an avrdude: ser_open(): can't open device error similar to the output shown below.
If you installed the drivers for the CH340 on your computer but have issues connecting via serial terminal or uploading code using the Arduino IDE, there may be an issue with your user settings preventing you from using the CH340. COM Port Not Available Windows, Mac, and Linux
Users seem to be able to eventually get the board recognized by a combination of giving the computer time to finish the install ( close to 20 min), plugging the board back in multiple times, reinstalling the drivers, and/or resetting the computer multiple times ( repeat both steps). Others have had issues where the installation process hangs.īased on the customer experiences, this might be specific to the manufacturer and are usually isolated cases. However, the board cannot be accessed on the Arduino IDE. We have had a few reports on Windows 10 where the driver will automatically install and the board will show up under a new COM port as USB-Serial CH340, but with a different device name. If you need further assistance with Windows, let us know and will be glad to help.Troubleshooting COM Port is Not Showing Up as CH340 Windows Let the driver install and then check the functionality. Right-click on the setup file of the driver and select Properties.Ĭheck Run this program in Compatibility mode. If the available USB driver is not for Windows 10, try installing the driver in compatibly mode and check. If the issue still persist, I suggest you to go to the USB manufacturer website and install the driver for Windows 10. Follow the below steps.Ĭlick on Universal Serial Bus to expand and right click on the port device and click on I recommend you to update the HooToo USB port driver and check if this helps. Let’s try simple steps and check if this help. Welcome to Microsoft Community and thank you for posting your query.īased on your description, the issue seems like HooToo USB port driver is outdated. Yellow ! next to Prolific USB-to-Serial Com Port (COM3) Now extract the CH340g drivers in a folder and in that you will find folder named CH341SER in.