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I'm using the Ketai (http://ketai.org/) bluetooth library with Android and it was working fine and then stopped working. Nothing significant was changed. I went back to the example Ketai bluetooth example to do a basic test and that is also failing. I've narrowed it down to this problem: non-paired devices are not being discovered. If something is already paired to the phone, it sees it and shows me the option to pair it (again?) in the list.
I am using a Nexus 5x with Android 6.0 currently. I was using it with 7.0 but tried reverting to 6.0 to see if that helps. It does not. I have SDK 6.0 (23) selected in processing and permissions are set properly. This issue was replicated on a Google Pixel with Android 7.1.2.
I have an urgent need for this - any help would be greatly appreciated!!