Script for Mac OSX to Restart Bluetooth service & Reconnect all recently paired devices

bluetooth-restart.sh

#!/bin/bash

echo "Restarting bluetooth service..."
blueutil -p 0 && sleep 1 && blueutil -p 1

echo "Waiting bluetooth service to be restored..."
until blueutil -p | grep "1" >/dev/null; do sleep 1; done

echo "Searching for devices not connected..."
devices=($(blueutil --paired | grep "not connected" | awk -F '[ ,]' '{print $2}'))
echo "Found ${#devices[@]} recently paired devices not connected"

for device in ${devices[@]}; do
    for retry in {1..5}; do	
    	echo "Trying to connect to ${device} ..."
        if blueutil --connect ${device}; then break; fi
        echo "Failed to connect to ${device}"
        sleep 1
    done
done

Here's another version adapted from above that selects only recently paired devices (within the last day), and also prints out the device name. Note that the script requires a recent version of blueutil that can output JSON.

#!/bin/bash

# Restart the Bluetooth stack on macOS
#
# Adapted from https://gist.github.com/thiagoghisi/50c3ba835ea72cdb0318fb3306fd2c76
# See discussion at https://gist.github.com/nicolasembleton/afc19940da26716f8e90

# ensure blueutil and jq are installed
for bin in blueutil jq; do
  if ! hash $bin 2> /dev/null; then
    echo >&2 "Please install \"$_\" first!"
    exit 1
  fi
done

echo 'Restarting the Bluetooth service...'
blueutil -p 0 && sleep 1 && blueutil -p 1

echo 'Waiting for service to be restored...'
until [[ `blueutil -p` == 1 ]]; do sleep 1; done

echo 'Searching for recently paired devices...'
_IFS=$IFS; IFS=$'\n'
# jq expression returns lines: <address> <name>
devices=($(blueutil --recent --format json | jq -r 'def daysAgo(days): (now | floor) - (days * 86400); daysAgo(1) as $recent | .[] | select((.recentAccessDate | sub("[-+]\\d{2}:\\d{2}$"; "Z") | fromdate) > $recent and .paired and (.connected | not)) | .address + " " + .name'))
echo "Found ${#devices[@]} paired device(s) not connected."

for dev in ${devices[@]}; do
  addr=$(echo "$dev" | colrm 18)
  name=$(echo "$dev" | colrm 1 18)
  for retry in {1..3}; do
    echo "Trying to connect to ${addr}: ${name}..."
    if blueutil --connect ${addr} 2> /dev/null; then break; fi
    [[ $retry == 3 ]] && echo "FAILED to connect to ${addr}: ${name}."
    sleep 1
  done
done

IFS=$_IFS