The ideas inspired by the final project I needed a buzzer that makes a sound and the red led to open by Bluetooth
and solve forgetting or searching problems it made it easy to find any device using this way.
I use Arduino software to typing he code
to control with Bluetooth
Arduino
Mini Breadboard
LED
Jumper Wires
Buzzer
Resistor
https://www.tinkercad.com/things/3vX1tk7B640-epic-gogo/editel?tenant=circuits
here is the circuit on tinkercad
here I built the circuit with a red led , a buzzer and Bluetooth and then i attached the buzzer to pin 10 , led to pin 6 .
Here I was writing the code to upload it to Arduino when I was press a then the buzzer made a sound and a red led opened too
I was defining which pin I put the led on, the buzzer too, and incoming data to Bluetooth.
then at void setup, I write which pin output or input, and then at the void loop I put the condition for I want here I want to if the Arduino read (a) letter the led will be open and the buzzer too and then we have delay for 2 sec and will close.
this is the final result I got it .
I don't have an android phone so Ibrahim asker to give me his phone to work on it and use the app so Thanks Ibrahim