1. Check the U-disk or USB extension cable if it is in poor connection.
The USB extension cable is generally 1.5 meters, not over than 5 meters.
2. Maybe the control card power supply voltage is low, generally need about 5V.
3.Format the U-disk to FAT/FAT32, and export the program again, plugged into the U-disk to the control card,
then restart the control card.
4.Replace the U-disk, such as: Sandisk, HP and so on.
5. Check if two or more mobile devices are plugged into your computer, and the program is not exported to the U-disk which plug in the control card.
6.if the screen show " the device type does not match", need change the device type in "setting"→“screen setting”.
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Huidu Asynchronous LED Controller