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Bluetooth - Send message

Connection diagram. Password 0000 or 1234.

Send 123 via Bluetooth to your phone.
 

Bluetooth - Read

VideoArduBlock 2.0 - Bluetooth - Send message

Components from Aliexpress:

Arduino UNO board 5mm LEDs Potentiometers Tact buttons HC-05 Bluetooth

 

Atmega Microcontroller Software Development Center
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