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[LarryD]

CH340

Added to the index.

Yes, the CH340 driver would need installation.

How to Install CH340 Drivers - SparkFun Learn

Tutorial: Installing CH340 Drivers

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• Also, see:

Avrdude: ser_open(): can't set com-state for "\\.\COM5" Failed uploading: uploading error: exit status 1

Hi @teaoncup There were some previous reports of this "can't set com-state for ..." error occurring specifically when using boards that have the CH340 USB chip. It seems that a driver upgrade included in a recent Windows update is the cause of this problem. The affected users have found that uninstalling and reinstalling the CH340 device fixed the problem. I'll share the instructions you can follow to do that: Close Arduino IDE if it is running. Connect the Arduino board to your computer wi…