pairmx.sh

#!/bin/bash

### Pair a Logitech MX Anywhere 2 mouse with a Linux host. It shouldn't be this complicated.
### Credits go to James Anthony here: http://askubuntu.com/questions/741330/how-do-i-get-logitech-mx-anywhere-2-to-work-in-16-04-bluetooth-smart

DEVICE_REGEX='MX Anywhere 2'

echo 'Please put your device into pairing mode if it is not already.'

echo -n 'Waiting for device detection'

while true; do
    echo -n '.'
    sleep 1
    found=$(echo -e '\npower off\npower on\nscan on' | \
        bluetoothctl 2>/dev/null | grep -E "${DEVICE_REGEX}") && break
done 

found=$(echo $found | grep -oE '([0-9A-Z]{2}:){5}[0-9A-Z]{2}' | sort | uniq)

while read -r device; do
    bluetoothctl 2>/dev/null <<EOF
power off
power on
connect $device
trust $device
connect $device
pair $device
unblock $device
power off
power on
EOF
done <<< "$found"