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I've got a Bluetooth keyboard and mouse connected to a MacBook at my desk in my home office. When I'm laptopping outside the office (which is honestly most of the time), away from the keyboard/mouse, they stay connected, thereby chewing through batteries and popping up warnings.

I was hoping there was a way to adjust the radio sensitivity or cutoff or something. For example, I'm outside the office right now and they're about -75 dB RSSi, and I'd like to tell the system "don't connect to devices with signal below -60 dB".

  • A simpler solution would be to turn off the BT devices or put them in a faraday cage. – IconDaemon Oct 23 '17 at 12:29
  • @IconDaemon yeah, turning them off is the most explicit way to deal with it, but I forget, and this seems like a problem automation could deal with. As for a Faraday cage, sure, my wife would love that :P – nfirvine Oct 24 '17 at 20:04
  • The faraday cage can be a simple as a mylar anti-static bag. – IconDaemon Oct 24 '17 at 21:34
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I ended up solving it myself. In short:

  1. get signal strength from system_profiler; if bad, turn off bluetooth
  2. check AC power with pmset; turn on Bluetooth if connected

Needs blueutil to toggle Bluetooth.

I couldn't find a way to tell a device to shut off remotely.

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