Who has by no means left their telephone in a single place and realized too late that they’ve misplaced it? On this mission we’ll search for an answer to the issue; at any time when you’re too far-off out of your telephone, “Don’t Lose Me” will blink and whistle, in addition to your telephone will play an annoying sound (or a track of your selection).
A Bluetooth connection is established between the telephone and “Don’t Lose Me” (by way of the HC05 module). Your telephone is consistently sending information to an Arduino Nano. When the connection is interrupted it’s for two causes: both you’re too removed from the cellular or you’ve pressed the pink button. In each circumstances the outcome is identical, Arduino receives no information and begins blinking and whistling, your telephone detects that the info it’s sending has no receiver and in consequence it’ll play an alarm.