Every blue moon, for whatever reason, my Apple Wireless Keyboard decides it's done taking the abuse of my busy typing fingers and completely disconnects the Bluetooth connection, leaving me with the keyboard equivalent of air-guitaring and the "Connection Lost" notification shown above.
Sometimes the warning is the keyboard doing the equivalent of clearing its throat and reminding you it's time to switch in some fresh new batteries. But other times the keyboard may reveal itself to be sufficiently charged and the sudden disconnection is a mystery, warranting further investigation.
2) Finding Bluetooth Interference: occasionally nearby Bluetooth devices can interfere with the ones you're actually using. Maybe it's a wireless Bluetooth speaker, or another mouse you forgot to turn off, or a nearby computer...it can even be interference from a brick wall or a microwave if you happen to work with one nearby. But you won't know until you do a little snooping use the “Monitor Connection RSSI” (received signal strength indicator), as advised by OS X Daily.
- Open System Preferences from the Apple menu
- Choose “Bluetooth” and select the device you want to monitor the connection for
- Next, Option+Click the little gear icon and from the pulldown menu choose “Monitor Connection RSSI” to bring up the connection monitor window
- -40 to -55 is a very strong connection
- -70 and above represents a good connection
- -100 and below represents a bad connection
- -110 and below is almost unusable
After using the signal strength figures, try changing locations of surrounding elements or move your setup; one can move beyond surmising the cause of interference, and hopefully improve signal strength with "before" and "after" results.
I've used the monitoring option above to help improve Bluetooth wireless audio connectivity between my laptop and a wireless speaker (a load bearing wall of our old building was causing interference), alongside discovering another wireless keyboard I had forgotten to turn off was interfering with the one on my desk. I've even strangely seen just a foot distance can make the difference between a good signal and a great signal when it comes to my wireless Logitech mouse. You won't know until you play around and discover the sweet spot between signal strength and location (or the need to replace your batteries). Happy signal hunting!
(Images: Gregory Han)