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  1. Find the microswitch in between the USB ports on the expansion board.
    Switch the microswitch up towards the standard-sized USB port, if it isn’t already.

    Microswitch toggled up for host mode

  2. Plug in the DC power supply to the barrel connector since USB host mode requires the use of an external power adapter.

    DC power supply being plugged into power barrel connector

  3. Plug a USB peripheral with a standard-sized USB connector into the USB port above the microswitch on the expansion board.

    USB cable being plugged into standard-sized USB connector on expansion board