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==Overview==
This CM4 Stick is an expansion board based on Raspberry Pi CM4. Provides a variety of expansion interfaces for the CM4 module, including upgrade interfaces, GPIO expansion, CSI, full size HDMI, TF card slot, USB 2.0, fan socket, etc..
With a small size, it is can be adapted to variety of applicantion.
When connected to the computer with USB-A OTG, it becomes a real USB flash drive.
The USB interface is disabled to save power by default on the CM4 . To enable it you need to add dtoverlay=dwc2,dr_mode=host to the config.txt file