Sorry aboutmy english.Simple solution is to power up Bridge throug Basic or similar. If you at home,then bridge not working-it means no notifications.
I dont understand.(or my english is really bad).How your lights blinking if bridge is off? PIR connects throug bridge.So i dont see the problem if you use another bridge only for security.
OK,now i understand.Only way is replace sensors battery power to AC power and again,through Basic or similar