Bluetooth is a powerful device for short-range communication. You must be familiar with Bluetooth. yes, I am talking about Bluetooth have on your smartphone. Do You know that you can connect your smartphone to Arduino using the Popular HC-05 Bluetooth module? Yes, In this article we are going to connect your android phone with Arduino and control it.
HC-05 Bluetooth is based on SPP (Serial Port Protocol) module. Design to send serial wireless data between two different Bluetooth devices.
is use to start for AT Command (You can change name and password with AT Command)
Transmitter (Transmit data )
Receiver (Revive data)
Enable or disable the module to save power
up to +4dBm RF transmit power
Operate on 1.8 – 3.6V
UART interface with programmable baud rate
Connection with HC-05 with Arduino is very simple. HC-05 works on 3.3v also but 5v is recommended. The module having an inbuild 3.3 voltage regulator.
Pin 0 (RX)
Pin 1 (TX)
Note:-RXandTXalway connect in cross connection
Mobile Application Setup
Download the application Arduino Bluetooth control from the Google play store.
The next step is to pair your mobile phone with the HC-05 module for that open your mobile Settings>Bluetooth turn on the Bluetooth then in the list find your click on Device (Generally end with HC-05) it will ask for a password default password for HC-05 is 0000 or 1234.
After pairing open the app and connect with module
Open buttons and press 1 and 2 you can send custom data or re-program the buttons.