PI 4 Bluetooth drops out when Wifi connected

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I installed Ubuntu Mate 20.10 64bit on a PI4 2GB and connected a Bluetooth Keyboard and Mouse. I kept getting intermittent dropouts. After disabling wifi and connecting an ethernet cable dropouts stopped.

Any help would be greatly appreciated.

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Hi Robert,

Unfortunately, as Bluetooth and WiFi both share the 2.4GHz band, they often can interfere with each other. Some Pi users have had success with external adaptors at the end of an extension lead to get around this limitation.

Here’s a page that goes over why getting them to play nice (coexist in radio terms) can be hard:

All the best with your project, and let us know if you’ve got more questions!
-James

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Thanks for the quick reply. I’ve seen a number of articles that discuss that but I don’t understand why it’s an issue on the PI when it works fine on phones and windows laptops.

Anyhow, do you think it would be possible to get it working at 5GHz?

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Hi Robert,

If your router supports it, you can try splitting your 2.4GHz and 5GHz bands into two separate SSIDs (networks) then making sure your Pi only connects to the 5GHz one (The Pi has dual-band WiFi luckily)

While RF questions are a little over my head experience-wise, I’d guess that laptops and other devices have access to more antennas due to their size, or more expensive/capable chipsets to avoid this problem. It could also be totally external interference in your particular case, as this problem doesn’t crop up too often.

Hopefully you can get to the bottom of this, as I totally get how frustrating connection issues on input devices can be.
-James

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