New answers tagged usb-on-the-go
I believe slim-port and MHL are your only options for USB > HDMI. The better options IMO are Chomecast/Miracast screen mirroring.
Most USB Barcode scanner guns also have a set of special barcodes you can print and then scan with the gun to set the baud rate (and other settings) of the scanner. I would try changing that and see if the gun starts working right on that device. From your message that it's the QD2400, the user manual is full of QR codes you can scan to change the settings ...
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