Bluetooth Module HC-05 with Arduino | Connections & Coding tutorial

In this video, I have shown how to connect Bluetooth Module HC-05 with Arduino on the breadboard. I have explained Arduino Bluetooth HC-05 circuit diagram, pin description & arduino Bluetooth programming to control LED from the android phone through Arduino Bluetooth app.
Download link for the circuit and Arduino code for HC-05 module

In this Arduino HC 05 tutorial, I have also discussed the arduino bluetooth code for simple arduino bluetooth projects to explain how data send from Bluetooth module to Arduino and how to pair HC05 with Android smartphone.

#HC05toArduino #HC05BluetoothModule %TechStudyCell

This is a very basic Arduino Bluetooth tutorial where I have controlled load like LEDs and DC motor from the smartphone. In the upcoming videos, we will see how to control different AC load from the smartphone through Bluetooth.

After watching the complete video you can easily design the circuit and write the Arduino code for Bluetooth module as per your requirement.

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[ChrisAnderson----Web-Designs]

Ha! It works without the gray wire and no 9 Volt which I'm not sure what that is for, but I never noticed the Vin on the Arduino before either, something new I'll have to research. People just do what he says by disconnecting the RX and TX before you upload your sketch. Thank you very much dude for this video. I spent countless hours watching other videos that didn't work and no download for code. I'm posting your code here just in case the download link disappears. I used pin 8 with LED and 330 ohm resistor and it works on switch 2 on the app. YOU ROCK MY FRIEND!


void setup() {
// put your setup code here, to run once:
Serial.begin(9600); //Define Baud rate 9600
pinMode(13, OUTPUT); // Define pin 13 as OUTPUT
pinMode(8, OUTPUT); // Define pin 8 as OUTPUT
}

void loop() {
// put your main code here, to run repeatedly:
if(Serial.available()>0)
{
char data= Serial.read(); // reading the data received from the bluetooth module
switch(data)
{
case 'Z': digitalWrite(13, HIGH);break; // when Z is pressed on the app Turn on Pin 13
case 'z': digitalWrite(13, LOW);break; // when z is pressed on the app Turn off Pin 13
case 'Y': digitalWrite(8, HIGH);break; // when Y is pressed on the app Turn on Pin 8
case 'y': digitalWrite(8, LOW);break; // when y is pressed on the Turn off Pin 8
default : break;
}
Serial.println(data);
}
delay(50);
}

[ninjanyan]

This cleared up some confusion, had it ready to go in ten minutes. thank you so much!

[DWard]

Thank you for this video you made it really easy to understand how to use the module!

[mayankchauhan]

wow man !! now this is what we call a good tutorial. love you bro

[bgm]

Bro can I use hm 10 blutooth module please reply

[Dr-Shlomo-Cohen]

Hi, I need to put a transmitter on the collar of my dog, so when he barks it would trigger a device in the house. I also need to keep track of the barks on an app on my phone that I will later make. What technology do you recommend? How? Thank you so much.

[ChrisAnderson----Web-Designs]

Excuse me, but what is the gray wire and the other resistor connected to in your video?

[MarioBignami]

hello, is it possible change de bluetooth mac address of this device? how can i do it?

[souparnika]

Hi sir
I want to interface 4 switch buttons and bluetooth(hc-05) to the arduino board and I want to send the switches status to the other bluetooth module which is connected to the other arduino..
Can you plez help me to write the code for this???
Thanks
Regards
Naresh

[electoreal]

Mere mobile me Hc 05 is not shown what should i do??

[salmanpatel]

Pls sir help me I'll make IR+BT REALY MODULE but arduino code is error

[sadanand]

How is code loaded in hc 05 module from laptop. You have not explained this.

If already done, request link to understand as to how to load codes in the hc 05 module.

[ElectroRetro]

What happens when we connect directly without resistor