Keyspan USA-19HS¶

The Keyspan USA-19HS is a USB <-> RS-232 adapter. There is no Linux support according to the vendor, but it can work. It does needs some firmware to operate, depends on the distribution if it is correctly packaged. It is not the usual FTDI (clone) or CH340, but it uses a different chip.

[21817.530943] usb 1-2: new full-speed USB device number 9 using xhci_hcd
[21817.675271] usb 1-2: New USB device found, idVendor=06cd, idProduct=0121, bcdDevice= 1.00
[21817.675277] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[21817.675279] usb 1-2: Product: Keyspan USA-19H 
[21817.675281] usb 1-2: Manufacturer: Keyspan, a division of InnoSys Inc.
[21817.722343] usbcore: registered new interface driver keyspan
[21817.722360] usbserial: USB Serial support registered for Keyspan - (without firmware)
[21817.722373] usbserial: USB Serial support registered for Keyspan 1 port adapter
[21817.722383] usbserial: USB Serial support registered for Keyspan 2 port adapter
[21817.722394] usbserial: USB Serial support registered for Keyspan 4 port adapter
[21817.722415] keyspan 1-2:1.0: Keyspan 1 port adapter converter detected
[21817.722717] usb 1-2: Keyspan 1 port adapter converter now attached to ttyUSB0