I know this video is older, but it just saved my day. This it a clear, easy-to-follow HC-05 setup tutorial. Thanks!

Thanks awesome video very rare unique and useful. Can't believe the channel doesn't get as much popularity as Great Scott!'s, keep up with the great videos.

Regarding to HC-05 problems: My hc05 moduls does not make the 2s blinks even if they're in AT command mode. There is no visible indication. It just fast blinks like you have no connection. But if the connections are right, I can successfully use AT commands. So imho just forget about blink indication. Not every model doing that. Also my HC-05 moduls came with 9600 baudrate default. Also consider checking other baudrates if you can't get response from 38400. You can change it later on. "AT+UART=38400,0,0" command will put your moduls into 38400 baudrate. Try givining 3,3V into Enable pin instead of 5V. This could help with some models. After successfully solving problems and setting HC-05s, this training worked like a charm. Other than that; color codes on resistors are wrong but the writing is correct in the schematics. Check that if you did it wrong.

As far as i see u have connected RX to TX and TX to Rx?

It took lot of time for me to do this one... But finally worked....thanks uploaded!!! Regards and well wishes to you...!!!

At commands to set hc05 as master and slave are very helpful. Working charm for me. Thank you

Hello there I have been looking on KZfaq for hours and hours and billions and billions and billions of seconds and now I’ve found my solution thank you so much sincerely thanks

Great video. Programmed as you showed, placed the Slave on a portable Uno and did a range test. Almost ran out of distance before I lost the link. Keep them oriented the same, as in standing up on the breadboard and don't stand between them and the 50 foot range seems to be accurate. I only needed 25 feet. One thing I did notice, when I asked for the UART settings it sent back 9600 even though I was communicating with the serial monitor on 38,400 to program them. It sees the 9600 only applies to the baud rate of data between the two units. That's perfect for me as well. Excellent detailed video. Thanks

Hello Sir, first of all thankyou so much for a lovely explanation. Can you please tell me how many slaves can be connected to the master as active listeners at the same time? And which is the best bluetooth module with GPIOS and memory?

Hi, Bro, thanks alot! I remember about 5 or 6 years ago I wasn't using Arduino, libraries etc. I was programming everything by my self. OMG, how long it take and how difficult it was to adjust 2 HC-04 modules using AVR Atmega48, assembler language, and USB-UART based on MCP 2200. I had absolutely NO KNOWLEGE how to do it. I even wasn't know how to correct write AT commands. I mean "AT+name" or "AT + name" etc. I got how to do it correct through experiments and tons of time. And now I have a choice - order these modules and spent 2-3 weeks until its arrive to me. Or take my HC-04 modules (I hope it's alive after 5 years :D), my old assembler code and rewrite it to Arduino's language)) In any case the video is pretty much useful. Good job.

Awesome video mate, I think I'll be using this in a project I'm currently working on. Thanks!

Excelente vídeo y excelente explicación! Muchas gracias por tu aporte! Tu vídeo nos ayudo mucho en un proyecto escolar!

Hello is it possible to have two of the HC-05 as transmitters and one HC-05 as receiver?

Thanks so much! It helped me a lot to understand about Bluetooth device.

Thank you i love this video soo much

Solution to a problem. If someone is getting the getsync() error like I did, it's because you HAVE to remove the wires from tx and rx pins on the arduino before uploading the blank code. Then you may attach them.

Awesome and highly informative as per usual :)

hi I just started searching the way to use the bluetooth module 2 days before. but when i watched your tutorial video, i learnt almost every thing, i wanted to know, just in few minutes. this is great and very easy to learn tutorial boss. i have some questions. if i configure 1 HC-05 as master and other HC-05 as slave on 9600 baud rate, can i use both for simple digital data communication by using both with 2 separate MCUs ? will these both work full duplex mode ? means if master send any data string to slave so can slave also send any data back to master? Thanks to help me in advance

I cant pair my bluetooth modules since when i bind command the master bluetooth, there is a capital 'C' in the slave bluetooth's address and when i type the address with the capital 'C' it becomes small letter 'c' in the serial monitor. What's going on here? Can i change my slave's address? The 'C' doesnt stay capitalized when i set that in the bind command of the master bluetooth :/

Anyone getting stuck - the blue green wire might be around the wrong way and they need to be attached before you start to get a response from serial monitor after uploading the blank sketch.

Keep up the good work Dejan

Great tutorial!! I also wanted to know how can we build piconet with this??

Help are the two of my bluetooths connected? Both of them flashes once every 2 seconds? Its connected now right? I did all your steps...

data transmission is very slow, how can we get a quick response? please help...

I like your work man...

Well explained, thank you!

Thank you, good tutorial. I am trying to control 10 Servo motors this way, but I am having trouble. Any advice?

Paired but slave get nothing.. Slave doesn't shows output in serial monitor.

Hi Dejan! Great videos; love your channel! Quick question tho: what would be the most efficient way of transferring data from multiple pins on one board through the Bluetooth to the same corresponding pins on a second board?

Hello. i followed the same steps but my HC-05 Didn't communicating.

Hello sir, my module is blinking at a proper rate of 2 sec, but when I am giving the AT commands on the serial monitor, there is no response on the monitor. What can be the possible mistake?

first of all thank you for the informative video,secondly, I am using the adafruit EZ-Link Shield, does it work as a master? if so, how do I choose what Bluetooth device I want to connect to ? thank you

Great video, thanks Dejan :D

Awesome vid! Can you have the state be anything other than 1 or 0?

Thanks for the video and website. I read your instruction for configuring the master HC-05. Why doesn't it need the password (pin code) of the slave module ? Does it mean that we would need only the "address" of the slave module ?

*can i pair three or more bluetooth modules?*

Awesome information thank you! !

Great tutorial, thank you for sharing. I have a question, is that a Fritzing drawing? and if yes, where did you find the Bluetooth part? I have an HC-05 part in my library but it doesn't have the little button. Thank you.

Thanks for the video sir.... Plz make a video on how to store the data received from Arduino (analog read data via Bluetooth) to a text file and store the text file in a shared folder like Documents folder of internal storage... I am trying for this but not successful...

is it possible to put the button on the same side as the Potentiometer and the led on the servo side. how would i go about chaging the code.

So have gotten to the AT command mode as indicated by the light but it wont take any commands ?

Hi, great tutorial, thanks a lot!!! I'm trying to connect my HC-05 to a slightly different module: HM-10 broken out on the zs-040 board. I configured the HC-05 as master and the other one as slave. But the address the slave gives me looks quite different than in this example. It is 00:15:83:00:5E:EB. When using the AT+BIND command I get back an error (0). Do you know what I'm doing wrong?

hello and thanks for a good movie. why the maping isn't to 0-180?

If i want to control two servo motor with two potentiometer what should be changed in the code

hi brother , thanks to your videos.. I want to ask something ,i walk on project of audio transmission using bluetooth. i use two microcontrollers thus two BTs (one slave the other is master) with audio amplfier, microphone and speaker.... can you upload a video or help with instructions about transmitter and receiver circuits

sir, I guess the resistors are labeled wrong, checked using colour band calculator which one should i go with the labeled one or the schematic??

I would like to create a brake light system for a motorcycle that could be activated by bluetooth where the led would be on the rider's jacket. But that didn't use a cell phone, but a button on the motorcycle's brake pedal. Do you have a tutorial that could help me?

Is there any problem if the two modules flash at the same time or is it necessary that they do it one after the other?

Hello, what is the possibility of connecting 2 or more bluetooth modules to 1 only?

Hi I had following the step, the bluetooth module seen like connected, but the button-LED and the Servo Motor didn't workout

it is a very helpfull video. but how many motors can i control if im using arduino mega?

Thank you sir for your tutorial. i followed all the steps. but i can not paired two module. Can you help me now, what can be the problem there??

Can you connect 2 differnt hc-05 to a single ardunio? I'm trying to send and receive data between the ardunio and my android phone?

what is the largest servo i could connect to this circuit?

Could I use several blutooth HC05 device comunicate with one master HC05 module + arcduino ? I mean, all devices on listening the master?

How to change AT command mode ,,, for using with phone Bluetooth

Hello I need help with my project, my question is can we connect bluetooth module with BASYS2 and send data via bluetooth module?

Can we use amplifire bt with aurdino

Did you use Arduino Uno's?

I am trying to do the same thing with HC-12 and i dont know where to start

I have an application where I would like to send sync pulses at various frequencies unrelated to a particular baud rate - 5HZ or 11HZ for example instead of an RS 232 character. Would this work? Could I just pair them and then replicate random data at the other end as if I was replacing one wire with Bluetooth. Simple on an off basically.

Nice video, But i have question how to give address to arduino as master and slave? because i want to use xbee to communication

hi i have problem with HC-05. I did everything as in the movie, I was able to connect, but when I send information on master, I always get 248 on the slave. What's the cause?

Hello i have a problem, i should comunicate two module bluetooth HC-05, for pass dates of sensor d18b20, this sensor is digital?

HI my bluetooth module is not incuding the EN pin. Can I ignore it?

could you do the same with one hc-06 and one hc-05? and if so what are the modifications in the soft/hardware?

so slave recive datas from master? right?

I want to control 4 servo motors from the master to the slave suing 4 potentiometer....... can i do it using this Bluetooth module...

If I have HM10 Bluetooth Module so how use it.

hello , I want to know how to modify the program to control three cervomotors , please help me, thanks

will it connect even if the password of the slave is unkown by the master?

Sir , can we use arduino uno rather than arduino mega board

So, to have multiple slaves the only thing to do is setting “AT+CMODE” to 1 in the master?

can you plz make a robotic arm project ?? they dont exist on youtube it will be new and awsome !!

How do I tell if I own a hc o5 or hc 06 and I assume the 06 can only be the slave not the master ?

sir thanks for make this video is very useful. sir pliss make video about send multiple data through bluetooth between arduino and arduino. thanks sir

1 master is connected to two or more slaves....? Is there any posibility...?

Good video, question, if I were to set CMODE=0, could I use AT+BIND to talk to more than 1 slave from the master? i.e. add 2 or more "fixed" slaves?

Sr. I did it. it's working for 1 button as u did but when I am using more than 1 buttons and making respective changes in programme i.e calling the both button storing it's value and then sending it to Bluetooth and then using if else loop printing it but it's not working..... plz give me the soln what should I Do??

good job

can we send array over Bluetooth connection..

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.

Hello ms.nedelkovskiI have question I have project Two circuit First Arduino and ultrasonics sensor and Bluetooth Second lcd and Bluetooth I want connect between them send data from ultrasonic circuit 1 two lcd circuit two Can you help me how can I do it?

you mixed up the resistor values with the colors! Which is which?

mine say error 7 in at+bind command

new one to see , wow bro!!!

can i determine to auto connect 10 bluetooth module to to master ? Can i bind 10 module ? and my phone ?

I have one question, Every single module Bluetooth has a single direction or u can find 2 modules with the same direction?

I have a couple "master" modules that plug into the Windows USB (CP2102 + HC-05-USB / HC-06-USB).. and while Windows is able to open the COM port associated to the HC-05/HC-06, the Android phone sees the bluetooth device, but is not able to connect/pair!

Hi... default board rate of my HC-05 module is 9600,0,0. so should i need to change it to 34800. if it is yes, then how can i do it?

Can Arduino with blutoo find blutooth speaker?

Круто ❤

are this modules compatible BLE CC2540 CC2541with lilypad or arduino?thx

can I use a 2.2 Ohms resistor?

Please help me, I want to build a device where it can connect a smartphone to play music/connect to incoming call, but the device will have two output, one to speaker (wired connection) other to connect headset(wireless connection either through Bluetooth or something else)

configuration is necessary for slave mode

can i use HC 06 bluetooth as master and slave ?

connect arduino tx to bt tx and arduino rx to bt rx, power up arduino while pressing the button in bt module, open serial com set the baudrate to 38400 and Both NL and CR This will workin some BT module version

How many devices can be connected to one HC-05 module?

I found it is 9600 baud rate at default.