Hello, I am sure this is not a novel issue, but I have tried the suggested fixes to no avail. I purchased the DEV-09947 version of the SparkFun USB Host Shield but I have no idea of knowing if it is in fact the correct revision. The only thing printed on my board is a date: "5-28-10". I have my A…

SparkFun USB Host Shield board_qc not working [RESOLVED]

gdsports September 29, 2017, 5:31pm 4

Plug in something simple such as a USB keyboard. Or try the USB_desc.ino example program.

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