If this process isn't working for you, please read the video description. I've updated it with a few of the most common problems. If that doesn't help, search through the comments, i try to respond to every question. If that doesn't work, post your new issue in the comments and I will get to it. If that doesn't work, I sell pre-paired boards in my store. Link in the description!
And could you make a video all about your clone comm pad because I want to do what you did but I’m not sure how you did it and would like an explanation and how-to.
TOOK ME 1 YEARS TO PAIR THIS HC-06 AND U MY FRIEND MADE MY DREAM COME TRUE AFTER 100 VIDS WITH POORLY EXPLATION BUT U SAVED ME FROM GIVING UP MY DREAM AND FOR THAT I WANT TO SAY THANK U FROM THE BOTTOM OF MY HEART
Thank you so much I have been trying to pair the the modules together the whole day, NOBODY mentioned that you have to remove the high signal on the EN pin and swap the TX|RX BUT YOU. you are amazing .
Good tutorial re pace, no padding, no 5h1tty music and once the bid description is read, all is well. One other small comment; the paired flash is not synchronous. They both flash together to begin with but normally gradually drift in timing. Not important but some may worry.
OMG OMG OMG OMG OMG YOUR EXPLANATION IS THE MOST SIMPLEST ONE TO FOLLOW AND YOU TALK FAST AND IS WELL SPOKEN MAKES IT EASY TO FOLLOW AND I WANNA BE LIKE YOU WHEN YOU GROW UP SUBSCRIBEDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
@@almeespinosawild2196 no unfortunately my module was a fake one and there was nothing I can do to make this command works. Maybe by trying to flash a new firmware, but it's out of my knowledge
Great video, and i have no idea how it ever worked with TX going to TX and RX going RX in the first place. Most the world knows they need to be reversed as the module TRANSMITS into the RECEIVE pin . but it general it worked for me doing it the right way . thank you.
Puzzled me at first - but I think the cross is unnecessary because the data is just passing through the serial interface from the USB port, rather than originating within the Arduino.
Hi, I have a HC-5 and when I try to repower it using my power supply it worked but 5 second after it didn't work anymore the light is not blinking, and the resistor is very hot it even melts the plastic cover in it. Do you know how to fix this problem?
Hi I do not know if you are still answering questions, but I am able to follow your steps to a tee except when I switch to the other bluetooth module. When I do, I am unable to get a response from the serial monitor. No matter how many times I type "AT", nothing seems to come out. Is this a problem with my own bluetooth module, or is there something I missed in the video?
Troubleshooting: 1. Are you using an Arduino UNO? You must use an UNO to program. 2. Is the light doing the slow, long blinks representing AT COmmand Mode? 3. Is there a blank sketch uploaded to the arduino? 4. Is your serial monitor set to 38400 baud? If the answer to all these questions is yes then you may have a busted module, try another module with the same method to confirm.
Cannot get HC-05 to accept AT commands. Have followed instructions to the letter on two different modules, with two different Unos, and two different sets of jumper wires. Have tried all of the
Its a very good and clear video. Can u make another video that you program a simple ting with it like a press on a button sends signal to the slave and lights up a light. Can u also make another video where u can send with both that u can use them like a chat, or is it not possible.
Cannot get HC-05 to accept AT commands. Have followed instructions to the letter on two different modules, with two different Unos, and two different sets of jumper wires. Have tried all of the fixes in the description. Odd thing is the modules appear to be in programming mode with or without pushing the button at power up.
I know you said you did everything to the letter, just double check these two things: 1. Your baudrate is set to 38400 in the Serial Monitor. 2. TX-->TX RX-->RX
I have a question. What about the passwords that we configured? I applied exactly the same procedure but master could not connect to slave just because I have changed 1234 default password to something else. When I reconfigured the slave's password to be 1234 master could connect to it? If pasword matters (which seems so) how can we let the master know or bypass the password of the slave?
hey hope you see this comment, i followed the procedure with an arduino uno everything is ok the module respond ok to every command i send but when i try to change the role to 1 it just stays 0, even if i get an ok after the command AT+ROLE=1
My problem is at AT Command mode. I bring up my Serial monitor up on 38400 baud . I type in AT in the bar and get nothing not even a error what happened what have I done wrong. Also does it make any difference if i am using a Iphone as i can not see it in my Bluetooth.
I know others have probably asked but I cant seem to get a response at all from the AT command. I get the show blinking to happen but when I type AT on to command line I get nothing in return. Im on an Arduino Uno, made sure to set baud to 38400, and TX -> TX + RX -> RX. Not sure what could be wrong, any help would be appreciated.
Hello. Can you help me with one problem? after changing the role (AT+ROLE=1) to hc-05, the board returns OK, but with AT+ROLE? answer: +ROLE:0, that is, the role does not change
Can someone help me, i cant pair with the device even though it's LED is in slow blink mode. When enterring the pairing code it says can't communicate with HC-05
I succeeded in making the HC-05 blink slowly, but there was no response when I opened the serial monitor and entered AT twice (I entered the command within a second). serial monitor set to 38400 baud, I used an Uno R3
Great video thank you!! I follow your instruction to write AT in serial monitor and the reply is OK so when I write AT+ROLE=1 there's no response in the serial monitor, what should I do?
Hey, Ive been working with them using a different micro, UART is working, Role and CMODE are working. For whatever reason, the address I try to bind is not remembered by the HC-05. Any ideas?
it is not working with my nano, it has had other problems like not using the normal USB drivers (SDTI are the most common I believe) however I cannot see why this would not work, any ideas? Thanks
@swishy _ fishy In the end you can use a Nano for your project, but it appears you need to use an Uno to do the AT mode commands. Others have had the same issue using a nano which was resolved by switching to the Uno.
Hi Thanks for the video! Very informative. I have a question. Can we have one HC05 (as Master) connected to the Arduino and another one as a slave without any Arduino board paired with the master. The slave which is connected with a sensor passes the reading to the master and once the master receives the reading, the Arduino takes action. Thank you!
@@PatchBOTS You advise me what type of GBS modules that will be compatible with a Bluetooth module and at the same time an SD card . You can advise me because I'm a little lost thank you
i want my bluetooth hc 05 to connect to any device so if I use ur tutorial then I can connect my phone to the slave module and then I can use it . am I correct?
Hi one of the lads in my care has a arduino bat robit with an dsd module do i need a second module to run from his tablet. As with the one module tge d s d hc05 rejects the pairing . Thanks
You advise me what type of GBS modules that will be compatible with a Bluetooth module and at the same time an SD card . You can advise me because I'm a little lost thank you
Hello sir I am I wondering how to leave At Command mode. I have sent the command At+Reset and all it does is make it blink for a second and then continue back to the At Command mode blink could you please help me?
Hi, I follow all the steps but when it comes to sending the AT commands in the Serial Monitor it is not giving me any results back. I am working from a Uno, any idea why this will happen ? Thanks
New subscriber here! this video was concise and full of value.. I have a question, is it possible to add more than one address for the master to connect to whenever any of the added addresses are in range?
is it possible to pair a master to multiple slaves thru a secure pairing. eg. not use the 'any' command? if yes, how do I setup the AT command for this?
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.
Hm. I think all this is possible the only real tricky part is to figure out how you're going to power it on the dog side. Maybe attach a battery to his collar? If it was me, I would use all 3.3v components and use a single 18650 to power it. For the collar I would use a small microcroller like a ATtiny16 (check out TinyCore16). Some kind of sound module that can detect large bursts in sound and one of these HC-05 modules. Then on the other side just have some kind of app running that can collect each instance of a "1" coming in from the collar
So ive gotten it too AT command mode as indicated by the flashing light but thats as far as it goes the serial monitor will not give me any feed back ?
@@josephnavinkumar3089 some hc-05 boards have issues in the 38400 baud rate. There are codes I have found online to allow you to try this same tutorial in the 9600 baud rate. Try looking for these
Sorry this comment got flagged by youtube, I just saw it for the first time. Are you still having trouble? Please post a more specific problem you are having and I'll be happy to guide you.
Sir, actually i was trying to connect to my smartphone to a hc05, i put hc05 in master mode, i made cmode to 0, then i input my smartphone's mac adress (bluetooth) to the hc05 using serial command AT+BIND= (), but i dont know why my smartphone is not able to find the hc05 in device list ..
Great video. Would you mind if I asked a question? I want to remotely control some 12v lights, but need to use a standard toggle switch. How would you connect a switch to one of these units. I am a new boy to these products so my knowledge is limited. Thank you.
Yeah its very similar to wireless controlling of an LED just you will need to wire your micro controller to your 12V power supply and lighting to give it the input from the switch which is also wired to a separate micro controller
when AT command is given in the serial monitor... i am not getting OK response... not just OK .... im not getting any response.. please help me out..???
Great! But at the end of the process, my two modules don't blink together. Master(connected to mega) blinks, blinks and then Slave(connected to UNO) blinks but nevere together. Can you help me?
Hello pathbots, this was very helpful and I almost finished in less than 10 minutes but I ran into a problem. It says that my modules are binded and stay binded but they won't connect. I'm using an Arduino uno and have checked every step and everything is correct. Not sure why?
The default baud rate of AT command mode is 38400 and can not be changed. You can change the communication baud rate. Use the command AT+UART? You'll see the default communication rate it 9600. You can change that to anything you want
Best video on this subject I've seen so far! Great job! I'm assuming you're using a 3.3V arduino (since you're not running the arduino's TX pin through a logic level converter or resistor voltage divider)? You might want to specify this in the video. I'm pretty sure that the HC-05 can only handle 3.3V on its TX and RX pins and that 5V would fry it. Or maybe I've heard wrong and the HC-05 can handle 5V just fine?
Just fried my HC-05 board by connecting my arduino's TX pin to the HC-05's RX pin (without first going through a logic level converter). So it's definitely possible to fry it (as I feared). Not sure how you're getting away with 5V.
Yeah man, doing some research it says you should use a voltage divider on the RX pin to get it down to 3.3v. But I have 2 sets of HC-05's in my BB-8 driod, and I use one set for testing things all the time and have never had a issue with frying them. Really strange.
No worries. It was cheap. The back or your modules look a bit different than mine. It seems that not all HC-05s are created equal. There's probably varying base boards and manufacturers out there. Anyway, it would be awesome if you added a quick note about this in your video so no one else has to go through this.
So i used arduino mega 2560. During plugin into PC i held button. Beep says i am in AT configuration mode. I set all commands you mentioned and i was getting response OK. After test my bluetooths are able to pair because they both blink synchronized but they are unable to communicate and i dont know why.Both have same baud rates. Also i would like to ask i see ur mac address is xxxx.xx.xxxxxx this is format. When i check my mac addres its xx.x.xxxxxx is it because there are 0 digits hidden in it or its weird that i have diff format of MAC than you? Thanks.
Hello! Great Video! Right to the point. One question, do we have to set the AT commands every time we disconnect and re-connect the arduinos ? Or do the HC-05 "remember" their master or slave state ? Thanks!
@@PatchBOTS Oh, you could add in the description that Error (7) may also come up in case the address is two characters less; For example an address FCA8:9A:22ED is two characters less than in your tutorial in the end. This is simply fixed by adding zeros in the end, i.e.: FCA8:9A:22ED00 :)
Can we use 1 master & and 3 or 4 slaves sir.....i want to my 3 or 4 bluetooth modules using my mobile Google assistant, is it possible sir? If so could u plzzz give a brief note sir.
Great tutorial. This might be Ok for connecting couple pieces what if you have a 100 or 1000 Bluetooth pairs is there a way for two known Bluetooth hardware devices to auto connect?
You can not use a Nano for this method. You must use an Uno. Once the HC-05 modules are paired, you can attach them to Nano's, but the programming must be done on an Uno
Hey so I followed your video, (great job by the way!), and they are blinking twice every 2 seconds like they are paired, but it’s back and forth and not synchronized. Is it still paired? I couldn’t find anything wrong with what I did.
Please help me. I am using Arduino UNO. I read the issues you have written in the description. I have followed all the three techniques from Issue no. - 2. I have checked the connections several times. When I type "AT" command, it replies "OK", it replies "AT+ROLE?", "AT+PSWD?" etc. But when I type "AT+ROLE=1" it replies nothing!! "AT+NAME?" replies "+NAME:HC-05 OK". Model no. ZS-040.
almost the same problem: after changing the role (AT+ROLE=1) to hc-05, the board returns OK, but with AT+ROLE? answer: +ROLE:0, that is, the role does not change. have you found the reason for this yet?
@@muhammadtamim451 Thanks for the suggestion :) I'll try further, maybe I'll go through the hardware. I really want to make a remote control for the manipulator
Hi @PatchBOTS , i followed the same steps but after they both are paired, one HC 05 blinks every 2 seconds as in communication mode like yours but the other one blinks every 6 seconds. I think there is something wrong but can't figure. Pls Help....
Oh okay let me explain a little better. Tx is your "transmitter" and Rx is your "receiver". When you're programming the modules through AT you want the transmitters connected to each other and the receivers connected to each other. After everything is programmed and you have your master and slave, you need to switch around one pair of those wires such that the Transmitter of your Arduino is connected to the Receiver of your Bluetooth Module and vice versa. This way one receives what the other transmits.
@@PatchBOTSthanks for 1st doubt. Also if I want to send 5 sensors data by bluetooth, in that case which of the following two methods will be better. 1. Using 2 arduino uno and 2 HC05 MODULE...One arduino uno connected to Laptop for monitoring in Serial monitor. 2. ONE ARDUINO uno and one HC05 MODULE directly interface with laptop bluetooth. Also can we interface the master module with MATLAB? Kindly share your experiences. Thanks
My bluetooth module is not entering in AT mode by pressing the button and powering on arduino.. it keeps blinking fastly.. Can you help me to solve this problem?
Is it possible to connect number of HC-05 Modules at a same time? i connect to modules at same time but on bluetooth terminal app the names of these modules overlapp each other. What should i do?/Please suggest.
Worked well until the AT+BIND part. I got ERROR 7, which is not from a forgotten space. But I looked up over some forum and a guy wrote that different versions of BT modules can be the issue. And indeed I have version 2.0 on the problematic BT module and version 3.0 on the other one. Do you know something related to this?
Hi Lulian. Hm, I never ran into this problem with different Firmware before. Just double check you've replaced the colons with commas, and there is DEFINITELY no hanging space at the end of the address when you paste it in. If that doesn't clear the issue, try switching the roles of the modules. Maybe one firmware is more likely to bind than the other. If none of that work i recommend pouring through the information on Martyn Currey's blog. He has done extensive write ups on the HC-05 and all it's firmware versions. You may be able to find an answer in there: www.martyncurrey.com/hc-05-fc-114-and-hc-06-fc-114-first-look/ Good luck and PLEASE post your results back into the comments to help others who may run into the same situation
@@PatchBOTS Definitely there was not hanging space there xD. Indeed the issue was the different version of the BT modules. I connected two BT modules both with v2.0 and the pairing is done. Important fact: if I connect directly to RX without the voltage divider (like on Martyn Currey's blog) I cannot even enter to AT Command. If someone else struggles with this, take a look the connections of this guy : educ8s.tv/arduino-two-way-bluetooth-communication/. Thank you for your tutorial!
![Arduino HC-05: Bluetooth Module Configurator w/UNO R3 & Basic AT Commands [Tutorial]](http://i.ytimg.com/vi/ykgt4v7_4y4/mqdefault.jpg)
![Arduino HC-05: Bluetooth Module Configurator w/UNO R3 & Basic AT Commands [Tutorial]](/img/tr.png)
If this process isn't working for you, please read the video description. I've updated it with a few of the most common problems. If that doesn't help, search through the comments, i try to respond to every question. If that doesn't work, post your new issue in the comments and I will get to it. If that doesn't work, I sell pre-paired boards in my store. Link in the description!
bray ngubah ke 38400 baud ratenya gimana
Did you do this for your clone comm pad?
And could you make a video all about your clone comm pad because I want to do what you did but I’m not sure how you did it and would like an explanation and how-to.
It worked for me with an arduino mega for AT Command mode stuff
@@ArcaneStellaris that's great to know, I'll add it to the description
Excellent tutorial! Clear explanations, no intro, no background music, no bla-bla, just pure information. Greetings from Berlin!
TOOK ME 1 YEARS TO PAIR THIS HC-06 AND U MY FRIEND MADE MY DREAM COME TRUE AFTER 100 VIDS WITH POORLY EXPLATION BUT U SAVED ME FROM GIVING UP MY DREAM AND FOR THAT I WANT TO SAY THANK U FROM THE BOTTOM OF MY HEART
tHE MOST EASY VIDEO FOR THE THING I SEARCHED FOR
Thanks!
You gave me all I needed to know... in 5 minutes. Outstandingly clear and concise. Cheers!
Great explanation. Clear and concise. Well done. Subscribed.
Maker Project Lab perfect!
After checking out your channel I sub'd right away. Really looking forward to going through your video roll. Great stuff!
Thank you so much I have been trying to pair the the modules together the whole day, NOBODY mentioned that you have to remove the high signal on the EN pin and swap the TX|RX BUT YOU. you are amazing .
Glad it was helpful!
Super clear and concise. I wish all instructional videos were this good! Thank you!
Really nice feedback thanks!
Good tutorial re pace, no padding, no 5h1tty music and once the bid description is read, all is well. One other small comment; the paired flash is not synchronous. They both flash together to begin with but normally gradually drift in timing. Not important but some may worry.
The best tutorial I've seen so far on this subject. Gonna give it a try in a day or so.
Hurtcules thanks! that means a lot! good luck and message me if you run into any trouble
This video really helped out a lot thank you for the clarity and speed!
OMG OMG OMG OMG OMG
YOUR EXPLANATION IS THE MOST SIMPLEST ONE TO FOLLOW
AND YOU TALK FAST AND IS WELL SPOKEN
MAKES IT EASY TO FOLLOW AND I WANNA BE LIKE YOU WHEN YOU GROW UP
SUBSCRIBEDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
Hello, when I make an AT+ROLE=1, I get nothing and the role keeps being slave (0). Any idea why ?
Hello did you find any solutions? Im at the same page
@@almeespinosawild2196 no unfortunately my module was a fake one and there was nothing I can do to make this command works. Maybe by trying to flash a new firmware, but it's out of my knowledge
THE SHORTEST VIDEO I FIND, AND THE GREATEST, YOU EXPLAIN VERY WELL, YOU SOLVED MY PROBLEM, THANK YOU VERY MUCH FRIEND, NEW SUBSCRIBER
Great! Glad to help!
THE BEST EXPLAINED VIDEO I'VE EVER WATCHED.......... THANK YOU VERY MUCH :)
Great video, and i have no idea how it ever worked with TX going to TX and RX going RX in the first place. Most the world knows they need to be reversed as the module TRANSMITS into the RECEIVE pin . but it general it worked for me doing it the right way . thank you.
Puzzled me at first - but I think the cross is unnecessary because the data is just passing through the serial interface from the USB port, rather than originating within the Arduino.
Hi, I have a HC-5 and when I try to repower it using my power supply it worked but 5 second after it didn't work anymore the light is not blinking, and the resistor is very hot it even melts the plastic cover in it. Do you know how to fix this problem?
It fried up.go buy another one pal
It worked , with easy with your clear cut explanation , thank you very much sir.
Hi I do not know if you are still answering questions, but I am able to follow your steps to a tee except when I switch to the other bluetooth module. When I do, I am unable to get a response from the serial monitor. No matter how many times I type "AT", nothing seems to come out. Is this a problem with my own bluetooth module, or is there something I missed in the video?
Troubleshooting:
1. Are you using an Arduino UNO? You must use an UNO to program.
2. Is the light doing the slow, long blinks representing AT COmmand Mode?
3. Is there a blank sketch uploaded to the arduino?
4. Is your serial monitor set to 38400 baud?
If the answer to all these questions is yes then you may have a busted module, try another module with the same method to confirm.
Cannot get HC-05 to accept AT commands. Have followed instructions to the letter on two different modules, with two different Unos, and two different sets of jumper wires. Have tried all of the
Sorry not sure what could be wrong there.
Great video and explanations.Thanks from Nairobi
Its a very good and clear video. Can u make another video that you program a simple ting with it like a press on a button sends signal to the slave and lights up a light. Can u also make another video where u can send with both that u can use them like a chat, or is it not possible.
This would a fantastic addition
Thank you so much for this video, I was looking for a video that explained it easily and thoroughly!
Excellent, excellent!!! You inspire me. Please do more like this !!
Cannot get HC-05 to accept AT commands. Have followed instructions to the letter on two different modules, with two different Unos, and two different sets of jumper wires. Have tried all of the fixes in the description. Odd thing is the modules appear to be in programming mode with or without pushing the button at power up.
I know you said you did everything to the letter, just double check these two things:
1. Your baudrate is set to 38400 in the Serial Monitor.
2. TX-->TX RX-->RX
Need to add zeros for binding the address if not complete. Also, I've used Invootech method to connect the modules.
I have a question. What about the passwords that we configured? I applied exactly the same procedure but master could not connect to slave just because I have changed 1234 default password to something else. When I reconfigured the slave's password to be 1234 master could connect to it? If pasword matters (which seems so) how can we let the master know or bypass the password of the slave?
hey hope you see this comment, i followed the procedure with an arduino uno everything is ok the module respond ok to every command i send but when i try to change the role to 1 it just stays 0, even if i get an ok after the command AT+ROLE=1
My problem is at AT Command mode. I bring up my Serial monitor up on 38400 baud . I type in AT in the bar and get nothing not even a error what happened what have I done wrong. Also does it make any difference if i am using a Iphone as i can not see it in my Bluetooth.
Very good video. Straight to the point and perfect instructions. Thanks.
I know others have probably asked but I cant seem to get a response at all from the AT command. I get the show blinking to happen but when I type AT on to command line I get nothing in return. Im on an Arduino Uno, made sure to set baud to 38400, and TX -> TX + RX -> RX. Not sure what could be wrong, any help would be appreciated.
I have the same exact issue
Is there any way in which we can define the address of master in the code of slave circuit ?? To connect it directly
Hello. Can you help me with one problem? after changing the role (AT+ROLE=1) to hc-05, the board returns OK, but with AT+ROLE? answer: +ROLE:0, that is, the role does not change
hello, I have the same problem...ROLE will not change from 0 to 1.
Can anyone please help us with this problem?
Tony.
Hello how did you fix it?
Can someone help me, i cant pair with the device even though it's LED is in slow blink mode. When enterring the pairing code it says can't communicate with HC-05
I succeeded in making the HC-05 blink slowly, but there was no response when I opened the serial monitor and entered AT twice (I entered the command within a second). serial monitor set to 38400 baud,
I used an Uno R3
Great video thank you!! I follow your instruction to write AT in serial monitor and the reply is OK so when I write AT+ROLE=1 there's no response in the serial monitor, what should I do?
you found any solution?
@@almeespinosawild2196 actually I already finish that 2 years ago😅
Hey, Ive been working with them using a different micro, UART is working, Role and CMODE are working. For whatever reason, the address I try to bind is not remembered by the HC-05. Any ideas?
it is not working with my nano, it has had other problems like not using the normal USB drivers (SDTI are the most common I believe) however I cannot see why this would not work, any ideas?
Thanks
@swishy _ fishy In the end you can use a Nano for your project, but it appears you need to use an Uno to do the AT mode commands. Others have had the same issue using a nano which was resolved by switching to the Uno.
Hi
Thanks for the video! Very informative.
I have a question.
Can we have one HC05 (as Master) connected to the Arduino and another one as a slave without any Arduino board paired with the master.
The slave which is connected with a sensor passes the reading to the master and once the master receives the reading, the Arduino takes action.
Thank you!
You literally saved my life, THANK YOU A LOT
Glad I could help
@@PatchBOTS You advise me what type of GBS modules that will be compatible with a Bluetooth module and at the same time an SD card . You can advise me because I'm a little lost thank you
i want my bluetooth hc 05 to connect to any device so if I use ur tutorial then I can connect my phone to the slave module and then I can use it . am I correct?
Hi one of the lads in my care has a arduino bat robit with an dsd module do i need a second module to run from his tablet. As with the one module tge d s d hc05 rejects the pairing . Thanks
I was trying to do this with a Arduino Nano and was not successful. Bought a Arduino Uno and it took 2 minutes =) Thanks!
Great glad you found the solution!
Thank you so much, saved me a lot of frustration!
Isn't it bad to take the pin directly to the Arduino without using resistor does it not damage the Bluetooth.
thanks, now a question : how we can have directly connecting with HC-05 and headset bluetooth?
You advise me what type of GBS modules that will be compatible with a Bluetooth module and at the same time an SD card . You can advise me because I'm a little lost thank you
Could I use a Arduino mega ADK , board. If possible where is the wiring diagram. Thanks
Hello sir I am I wondering how to leave At Command mode. I have sent the command At+Reset and all it does is make it blink for a second and then continue back to the At Command mode blink could you please help me?
Remove the wire from the EN/KEY pin
PatchBOTS Thank you so much!
Don't you need level changer on the tx/rx lines as these are 3V3?
Hi, I follow all the steps but when it comes to sending the AT commands in the Serial Monitor it is not giving me any results back. I am working from a Uno, any idea why this will happen ? Thanks
baud rate set right? You have NL + CL selected? Not sure about the new Arduino IDE.
Can I use these modules to transmit audio between two devices
Hc 05 logic pins are 3.3 v, UNO is 5 v, can it tolerate ?. I saw in a Great Scott video to use a voltage divider between tx of uno and rx of hc 05.
Yes, should be fine without for programming but you should probably use one for regular use
New subscriber here! this video was concise and full of value.. I have a question, is it possible to add more than one address for the master to connect to whenever any of the added addresses are in range?
Not that I'm aware of, but check more recent firmware guides.
is it possible to pair a master to multiple slaves thru a secure pairing. eg. not use the 'any' command?
if yes, how do I setup the AT command for this?
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.
Hm. I think all this is possible the only real tricky part is to figure out how you're going to power it on the dog side. Maybe attach a battery to his collar? If it was me, I would use all 3.3v components and use a single 18650 to power it.
For the collar I would use a small microcroller like a ATtiny16 (check out TinyCore16). Some kind of sound module that can detect large bursts in sound and one of these HC-05 modules. Then on the other side just have some kind of app running that can collect each instance of a "1" coming in from the collar
Thank you so much! Brief and concise..
as I tested, to get into AT command mode, you only need to hold down the button while switching on HC-05. immaterial if u have made EN/KEY pin HIGH
Sir, after all the steps is done, what if the blinking light is not synchronized? But both blinking lights actually get slower but not synchronized
So ive gotten it too AT command mode as indicated by the flashing light but thats as far as it goes the serial monitor will not give me any feed back ?
I have this problem too with my nano, what board are you using?
im using a uno board but it still dosnt work
@@josephnavinkumar3089 some hc-05 boards have issues in the 38400 baud rate. There are codes I have found online to allow you to try this same tutorial in the 9600 baud rate. Try looking for these
amazing tutorial finally got everything to work great job!!!!!!!!!!!!!!!!!!!!
I can not get the HC-05 to enter paired mode. I feel like I am following this guide exactly. PLEASE HELP!!!
Look at the description
Sorry this comment got flagged by youtube, I just saw it for the first time. Are you still having trouble? Please post a more specific problem you are having and I'll be happy to guide you.
@@PatchBOTS I actually got them to pair! I found another circuit that used a level converter, and it worked great! Thank you!
@@VidAdiction Awesome!
Sir, actually i was trying to connect to my smartphone to a hc05, i put hc05 in master mode, i made cmode to 0, then i input my smartphone's mac adress (bluetooth) to the hc05 using serial command AT+BIND= (), but i dont know why my smartphone is not able to find the hc05 in device list ..
Sorry, not sure. I've never tried pairing with a smartphone.
Sir,
I want to know when the HC-05 bt module is paired ..the external LED what's to glow ....is there any possible ???
You can attach an led to the "state" pin. That will glow when it is paired
Hi.. What if we can't enter to AT mode.. When we type AT then enter, OK not showing..
I have some common trouble shooting in the description tot he video.
Great video. Would you mind if I asked a question? I want to remotely control some 12v lights, but need to use a standard toggle switch. How would you connect a switch to one of these units.
I am a new boy to these products so my knowledge is limited. Thank you.
Well it would be connected to a microcontroller on both ends so connect the switch to that and transmit the on/off data
Yeah its very similar to wireless controlling of an LED just you will need to wire your micro controller to your 12V power supply and lighting to give it the input from the switch which is also wired to a separate micro controller
How do I send a code to the Arduino via Bluetooth on my laptop (without using the Arduino cable and the alternative is Bluetooth)
when AT command is given in the serial monitor... i am not getting OK response... not just OK .... im not getting any response.. please help me out..???
Are you using an UNO?
Can I do the same if I want to connect to smartphones rather than another HC-05?
for me everything else works , but when i try to change the role it doesnt let me, what can it be ?
Great! But at the end of the process, my two modules don't blink together. Master(connected to mega) blinks, blinks and then Slave(connected to UNO) blinks but nevere together. Can you help me?
They don't necessarily have to blink together as long as they are blinking the same way.
@@PatchBOTS thanks!! Later i Will try again and i Will let you know :)
@@PatchBOTS and if i want that the two modules communicate eachother, which Is the Arduino's code?
The Serial monitor is not responding to AT commands, I did everything as stated. Any help?
Are you using an Arduino UNO?
@@PatchBOTS no Arduino nano
That's your problem. Programming must be done on UNO
Is it possible to pair a peripheral to the bluetooth module. (Ex. a bluetooth joystick to arduino via HC-05/etc)?
maybe, you'd need the MAC address of the joystick to pair it. I've never tried this though.
Sir my hc05 is blinking twoceand turning off
Can you help me?
i have one but what can i do with it?
In the part of entering the "AT" In serial monitor with 38400 buad rate both NL& CR No result or anything response
nvm thank youuuuu for this, it will help my thesis!
Hello pathbots, this was very helpful and I almost finished in less than 10 minutes but I ran into a problem. It says that my modules are binded and stay binded but they won't connect. I'm using an Arduino uno and have checked every step and everything is correct. Not sure why?
Is it possible to change the baud rate other than 38400? I want a high baud rate for my application.
The default baud rate of AT command mode is 38400 and can not be changed. You can change the communication baud rate. Use the command AT+UART? You'll see the default communication rate it 9600. You can change that to anything you want
Best video on this subject I've seen so far! Great job! I'm assuming you're using a 3.3V arduino (since you're not running the arduino's TX pin through a logic level converter or resistor voltage divider)? You might want to specify this in the video. I'm pretty sure that the HC-05 can only handle 3.3V on its TX and RX pins and that 5V would fry it. Or maybe I've heard wrong and the HC-05 can handle 5V just fine?
Nah I think they can handle it. Haven't had any problems yet.
Just fried my HC-05 board by connecting my arduino's TX pin to the HC-05's RX pin (without first going through a logic level converter). So it's definitely possible to fry it (as I feared). Not sure how you're getting away with 5V.
Yeah man, doing some research it says you should use a voltage divider on the RX pin to get it down to 3.3v. But I have 2 sets of HC-05's in my BB-8 driod, and I use one set for testing things all the time and have never had a issue with frying them. Really strange.
No worries. It was cheap. The back or your modules look a bit different than mine. It seems that not all HC-05s are created equal. There's probably varying base boards and manufacturers out there. Anyway, it would be awesome if you added a quick note about this in your video so no one else has to go through this.
Yeah, maybe a brand issue. I'll put a notation in there later today and make a section in the description of the video.
it is possible that thus setup is control by mobile phone?
I don't have a reset button on my Bluetooth module, please help
So i used arduino mega 2560. During plugin into PC i held button. Beep says i am in AT configuration mode. I set all commands you mentioned and i was getting response OK. After test my bluetooths are able to pair because they both blink synchronized but they are unable to communicate and i dont know why.Both have same baud rates. Also i would like to ask i see ur mac address is xxxx.xx.xxxxxx this is format. When i check my mac addres its xx.x.xxxxxx is it because there are 0 digits hidden in it or its weird that i have diff format of MAC than you?
Thanks.
Great video thank you!! I follow your instruction to write AT in serial monitor but there is a problem in writing AT+BIND. Can I know why?
Hi I have Normal USB speakers and I have HC05 module with me.. How can I make the connections in order to turn the speakers to Bluetooth? Any way?
Sorry, I have no idea. Would depend a lot on what each HC is connected to.
Hello! Great Video! Right to the point. One question, do we have to set the AT commands every time we disconnect and re-connect the arduinos ? Or do the HC-05 "remember" their master or slave state ? Thanks!
They remember!
@@PatchBOTS Insanely fast reply, thank you, really appreciate it :)
@@eleftheriostriantafyllidis3012 No sweat, if you run into any issues post them here and I'm happy to help
@@PatchBOTS Oh, you could add in the description that Error (7) may also come up in case the address is two characters less; For example an address FCA8:9A:22ED is two characters less than in your tutorial in the end. This is simply fixed by adding zeros in the end, i.e.: FCA8:9A:22ED00 :)
Can we use 1 master & and 3 or 4 slaves sir.....i want to my 3 or 4 bluetooth modules using my mobile Google assistant, is it possible sir? If so could u plzzz give a brief note sir.
Hello,
I'm using it for Arduino Micro
while I type AT commands it doesn't respond and shows nothing, not even error..?
can you please help me out?
You can use a micro for your project, but for programming in AT command mode you need to use an UNO. that is why you aren't seeing anything
When I connect the HC-05 they are already in slow blink mode but when i write the AT command i get no response
me also same problem
Great tutorial. This might be Ok for connecting couple pieces what if you have a 100 or 1000 Bluetooth pairs is there a way for two known Bluetooth hardware devices to auto connect?
followed your instructions for wiring, but I cannot enter AT commands on the serial monitor, what have I done wrong. I am also using an Arduino nano.
Same problem
You can not use a Nano for this method. You must use an Uno. Once the HC-05 modules are paired, you can attach them to Nano's, but the programming must be done on an Uno
Hello sir..I am working on. Robotic arm arduino uno and hc05 module..but blutooth is not connecting
Be happy to help if you can be more specific
Great video! Subscribed!
Thanks man!
Hey so I followed your video, (great job by the way!), and they are blinking twice every 2 seconds like they are paired, but it’s back and forth and not synchronized. Is it still paired? I couldn’t find anything wrong with what I did.
Please help me. I am using Arduino UNO. I read the issues you have written in the description. I have followed all the three techniques from Issue no. - 2. I have checked the connections several times. When I type "AT" command, it replies "OK", it replies "AT+ROLE?", "AT+PSWD?" etc. But when I type "AT+ROLE=1" it replies nothing!! "AT+NAME?" replies "+NAME:HC-05 OK". Model no. ZS-040.
almost the same problem: after changing the role (AT+ROLE=1) to hc-05, the board returns OK, but with AT+ROLE? answer: +ROLE:0, that is, the role does not change. have you found the reason for this yet?
@@secrey36 I didn’t find the exact reason. But I think, firmware versions less than 2 (two) don't support 'Master Mode'.
@@muhammadtamim451 Thanks for the suggestion :) I'll try further, maybe I'll go through the hardware. I really want to make a remote control for the manipulator
@@secrey36 welcome!
Hi @PatchBOTS , i followed the same steps but after they both are paired, one HC 05 blinks every 2 seconds as in communication mode like yours but the other one blinks every 6 seconds. I think there is something wrong but can't figure. Pls Help....
Should be fine. They may just be different firmware versions. You can check this by typing AT+VERSION?
@@PatchBOTS Yeah, one was of 3.0 and the other of 2.0. Could be the same reason, thank u so much for the quick and prompt reply, saved my day.
Nice video. I made Master and Slave, but I didn't get last step when you used other arduino and exchanged RX-TX and TX-RX (bluetooth and Arduino uno)?
Oh okay let me explain a little better. Tx is your "transmitter" and Rx is your "receiver". When you're programming the modules through AT you want the transmitters connected to each other and the receivers connected to each other. After everything is programmed and you have your master and slave, you need to switch around one pair of those wires such that the Transmitter of your Arduino is connected to the Receiver of your Bluetooth Module and vice versa. This way one receives what the other transmits.
@@PatchBOTSthanks for 1st doubt. Also if I want to send 5 sensors data by bluetooth, in that case which of the following two methods will be better.
1. Using 2 arduino uno and 2 HC05 MODULE...One arduino uno connected to Laptop for monitoring in Serial monitor.
2. ONE ARDUINO uno and one HC05 MODULE directly interface with laptop bluetooth.
Also can we interface the master module with MATLAB?
Kindly share your experiences. Thanks
My bluetooth module is not entering in AT mode by pressing the button and powering on arduino.. it keeps blinking fastly.. Can you help me to solve this problem?
Can I use it like one uno and one nano
Is it possible to connect number of HC-05 Modules at a same time? i connect to modules at same time but on bluetooth terminal app the names of these modules overlapp each other. What should i do?/Please suggest.
Not sure if you can connect more than one.
Worked well until the AT+BIND part. I got ERROR 7, which is not from a forgotten space. But I looked up over some forum and a guy wrote that different versions of BT modules can be the issue. And indeed I have version 2.0 on the problematic BT module and version 3.0 on the other one. Do you know something related to this?
Hi Lulian. Hm, I never ran into this problem with different Firmware before. Just double check you've replaced the colons with commas, and there is DEFINITELY no hanging space at the end of the address when you paste it in. If that doesn't clear the issue, try switching the roles of the modules. Maybe one firmware is more likely to bind than the other. If none of that work i recommend pouring through the information on Martyn Currey's blog. He has done extensive write ups on the HC-05 and all it's firmware versions. You may be able to find an answer in there: www.martyncurrey.com/hc-05-fc-114-and-hc-06-fc-114-first-look/ Good luck and PLEASE post your results back into the comments to help others who may run into the same situation
@@PatchBOTS Definitely there was not hanging space there xD. Indeed the issue was the different version of the BT modules. I connected two BT modules both with v2.0 and the pairing is done. Important fact: if I connect directly to RX without the voltage divider (like on Martyn Currey's blog) I cannot even enter to AT Command. If someone else struggles with this, take a look the connections of this guy : educ8s.tv/arduino-two-way-bluetooth-communication/. Thank you for your tutorial!
@@iulian312 Great! Thanks for posting your findings and glad you got it all working!