I've seen a few people ask how to activate this from time to time as I browse various forums. Root is required to activate, but you can unroot afterwards.
After the following fix, the tester app goes from saying unsupported to this lovely screen!
And away we go!
*To follow this guide you need to install MT Manager :
https://mt.jouyo.cn/MT2.9.0-3.apk
*Also, this (or similar) app to test if it is enabled:
https://play.google.com/store/apps/d...toothhidtester
1 Open MT Manager, and give it root permissions. Then navigate to Vendor/Overlay/BluetoothResCommon.apk
2 Open the apk with VIEW function and open resources.arsc with the included arsc editor
3 Open resources.arsc, then com.android.bluetooth.overlay.common, then bool, and then bool once more.
4 Change Profile Supported Hid Device to true.
5 Save changes, then make sure permissions are rw-r-r (mine were by default)
6 Reboot the RP2
7 Open tester app, and test for support.
8 Profit.
(This thread here gave me the idea and a starting place, but I needed to change something in a different location.)
https://forum.xda-developers.com/redmi-note-7/how-to/enable-bluetooth-hid-profile-t4071767/amp/
I've included a link to original thread in case you want to read the original without my changes)
Hope this helps anyone.
-Cheers
How to activate RP2 Bluetooth HID profiles. Root Required.
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