Open AT Command of HC-05 at a very easy way.

Hc-05 at AT command mode:-

A widely available bluetooth module HC-05 has capability to enable your project with bluetooth. The HC-05 comes with a rich set of AT commands to perform various tasks such as changing the module's default settings including changing the pass code and the device name and a lot of things.

You can change baud rate,password,name and many other settings.

HERE is the project to open AT command of HC-05 at a very easy way.

For this project you need:-

1. Arduino UNO

2. HC-05

3. Jumper wire

Schematics:-

Procedure:-

1. First upload a blank code on arduino uno.

2. Connect the components as given in the picture with jumper wires.
RX------------------to RX pin of Uno
TX------------------to TX pin of Uno
Gnd ----------------to Gnd pin of Uno
EN or Key pin----to 3.3V of Uno
Vcc(+5V)---------to +5V pin of Uno

3. Remove the Vcc pin(or +5V pin) from HC-05 and connect the uno to the pc or laptop.

4. Open arduino IDE and select proper borad and COM port from "Tools" menu.

5. You will find a small push button on the HC-05. Long press push the button(don't leave it) and connect HC-05 Vcc pin to arduino +5V pin and them leave the push button.

6. You will see the small LED will blink one time in two seconds. So, your HC-05 is at AT command mode.

7. Now open arduino IDE and follow the steps.

Open serial monitor.