WCH-Link

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The WCH-Link is a device intended to flash/debug MCUs such as the CH32V307

USB

The device shows up a composite device with one serial and one hid port:

[183839.489720] usb 2-4.2: new full-speed USB device number 21 using xhci_hcd
[183839.591964] usb 2-4.2: New USB device found, idVendor=1a86, idProduct=8011, bcdDevice= 2.03
[183839.591968] usb 2-4.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[183839.591970] usb 2-4.2: Product: WCH-Link
[183839.591971] usb 2-4.2: Manufacturer: wch.cn
[183839.591972] usb 2-4.2: SerialNumber: 0001A0000001
[183839.604739] cdc_acm 2-4.2:1.0: ttyACM0: USB ACM device
[183839.606945] hid-generic 0003:1A86:8011.000F: hiddev3,hidraw6: USB HID v1.00 Device [wch.cn WCH-Link] on usb-0000:00:14.0-4.2/input2

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