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rizwan asked Mark Mullan Deactivated answered

Usb Communication in Clover


we have clover developer unit ( clover mini ) and android tablet. the requirement is to communicate devices with each other.

we have successfully connected our tablet and Mini using Micro USB <> OTG Cable <> USB B. In this scenario, the secondary/peripheral is the Mini (USB B) and the tablet is the master/host (Micro USB).

now we want to eliminate OTG cable and want to communicate directly

We want to connect the Tablet <> Clover mini using Micro USB <> USB A (regular USB)
where clover will react as an host and tablet will react as secondry

we tried this by the same code which we used with OTG Cable.

in that case clover mini (Host) unable to open device.

i am getting following exception

java.lang.SecurityException: User has not given permission to device UsbDevice[mName=/dev/bus/usb/001/018,mVendorId=7994,mProductId=4103,mClass=0,mSubclass=0,mProtocol=0,mInterfaces=[Landroid.hardware.usb.UsbInterface;@419e7830] at android.os.Parcel.readException( at android.os.Parcel.readException( at android.hardware.usb.IUsbManager$Stub$Proxy.openDevice( at android.hardware.usb.UsbManager.openDevice( at com.usbhost.HostActivity$ at

in our official document i read we have to whitelisted our device to communicate with clover mini.

can u please tell me which credentials u need other than VID and PID of peripheral device ??

following are vendor and product_id mVendorId=7994,mProductId=4103

any help would be highly Appreciated.

thanks in advance.
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1 Answer

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Mark Mullan Deactivated answered
Resolving with this developer privately in a separate thread. For future reference, USB device whitelist requests should be directed towards Thanks!
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