"Encryption is insufficient" message with BLE

I'm working on a BLE app with a hardware partner using samples of their device, which I am able to erase and re-flash when needed.

When I try to use the device it initially works fine. I can connect to it, make requests, and get back responses.

However, after a short time and a few successful runs, I start getting the error "Encryption is insufficient". The error is seen in the "didUpdateValueFor" function. I can still connect to the device, and enumerate all of its services and characteristics, but I can't read any data.

If at this point I re-flash the device and also go into the iOS setting app and "forget" it, then I can use the device normally again, at least for a while.

What causes this? Is there a way I can fix it in my app?

Thanks, Frank

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flarosa
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Hello Frank, Did you manage to find a solution? I think we have the same problem since the last iOS updates. Thank you in advance for your feedback Kam

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AminoBX3
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Hi,

Did anybody resolve this problem or have any thoughts on how to fix it?

Thanks, Dmytro

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dimabua
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Depending on the your peripheral device, you may be able to set the properties of the characteristic that you are connecting to. In my case, where my peripheral was a Swift app on a Mac, I changed one of the properties from .notifyEncryptionRequired to .notify. It's obviously not an ideal solution, but it may be better than your app not working at all.

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humans are human
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