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This example detect key down/up and modifier (SHIFT/CTRL etc.) DN >0707<
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Protocol: 02 Intf.string: 00 Unknown descriptor: Length: 09 Type: 21 Contents:Đ00101228407000705 Endpoint descriptor: Endpoint address:Ę4 Attr.: 03 Max.pkt size: 0020 Polling interval:đ0 Interface descriptor: Intf.number: 03 Alt.: 00 Endpoints: 00 Intf. Protocol: 03 Intf.string: 00 Unknown descriptor: Length: 1B Type: 21 Contents:Đ00101018240010220168300000000000016030000000000000705 Endpoint descriptor: Endpoint address:Ę2 Attr.: 03 Max.pkt size: 0020 Polling interval:Đ2 Endpoint descriptor: Endpoint address:Đ2 Attr.: 03 Max.pkt size: 0020 Polling interval:Đ4 Endpoint descriptor: Endpoint address:Ę3 Attr.: 03 Max.pkt size: 0020 Polling interval:Ĕ0 Endpoint descriptor: Endpoint address:Đ3 Attr.: 03 Max.pkt size: 0020 Polling interval:đ0 Interface descriptor: Intf.number: 02 Alt.: 00 Endpoints: 01 Intf. Protocol: 01 Intf.string: 00 Unknown descriptor: Length: 11 Type: 21 Contents:Đ001012581140000000013010800000705 Endpoint descriptor: Endpoint address:Ę1 Attr.: 03 Max.pkt size: 0020 Polling interval:Đ4 Endpoint descriptor: Endpoint address:Đ1 Attr.: 03 Max.pkt size: 0020 Polling interval:Đ8 Interface descriptor: Intf.number: 01 Alt.: 00 Endpoints: 04 Intf.
OFFICIAL ARDUINO USB HOST SHIELD SERIAL NUMBER
You should see a message like this: 01 - Device descriptor: Descriptor Length:đ2 Descriptor type:Đ1 USB version: 0200 Device class: FF Device Subclass:ğF Device Protocol:ğF Max.packet size:Đ8 Vendor ID: 045E Product ID: 028E Revision ID: 0114 Mfg.string index:Đ1 Prod.string index:Đ2 Serial number index:Đ3 Number of conf.:Đ1 Configuration descriptor: Total length: 0099 Num.intf: 04 Conf.value: 01 Conf.string: 00 Attr.: A0 Max.pwr: FA Interface descriptor: Intf.number: 00 Alt.: 00 Endpoints: 02 Intf. Note: You can't hot-plug your USB device (at least in the examples), you need to reset the board each times you unplug, plug your device.