Thanks for the explanation - I'm going to use this to isolate a sensitive sensor array from a separate high current control array for a home made accelerated composter
The nrf24l01 modules are less expensive ,their code supports error checking and they are less power hungry. The disadvantage of course is that Bluetooth is everywhere and you can control it with eg. your smartphone or computer whereas the only way you can control the nrf24l01 is with another nrf24l01.
Venkatesh E I tried to build remote switches and remote thermometers, so I bought a bunch of nrf24l01 but in hindsight I should have gotten wemos d1 minis or equivalent. The nrf24l01 are a pain to connect to the internet whereas the esp8266 has the TCP/IP stack built-in
I wanted to say almost the exact same thing. The range on the nrf23L01 is also better than bluetooth, especially when you have a 'real' antenna connected to it. For RC toys that run outside, I would say the nrf23L01 is superior to Bluetooth. In theory it could go as far as 10 km according to this video: th-cam.com/video/zddC8rQasrg/w-d-xo.html. Great video though, for our bluetooth needs!
johnny wonka You don't need master and slave modes. You just need the IP the wemos gets from your router if you are indoor. You can make the esp8266-01 operate in master mode with AT commands. I assume someone has tried it with a wemos. Google is your friend.
Hey, I love your videos and the information is fantastic. I always look forward to your videos. One comment on the future project for the tank, I would recommend looking into using the ESP8266 and a Access Point (AP) connection for communication -- I think it would be much easier and you will probably get better range. Also, you would get to use a much faster processor of the Wemos D1 Mini.
Yes, thank you for your tutorials. They offer much insight into IoT things. Would be nice to see this using a now available BlueTooth 5 module to get much further reach for sensors outside of 10m distance. Great tutorial thx!
Thank you for showing connecting two modules instead of connecting with a 3rd party app. Also, thanks for explaining how to set it up acknowledging easy mistakes.
The other best option (for short and long range) is HC-11/12. This module communicates on UART and super easy to transfer between two MCU's and it can go upto 1 or 1.5 KM (depends on speed).
Dear educ8s.tv your tutorial are amazing. So now I'm tring to make communication two arduino with RS485 and got a trouble. Could you make some lesson with this protocol? Thks in advance
Before pressing upload remove the wires from the serial port of the Arduino board and connect them again after the sketch has been uploaded. So my question is which wires, all of them or?
Hi, that was a great tutorial and I think I will be using Bluetooth for my Boat Systems monitor. I was going to use the NRF24L01 but when I realise the maximum data packet size was only 32 bytes I realised it would be too difficult for me to implement. I'm needing to send and receive at least double that amount, but only across 3 metres. Do you think the bt protocol is best?
Hey ,i tried your project but it cannot uploaded to my board , always shows that "error compiling for board Arduino UNO" , other programs work fine but this cannot uploaded ,please help
Hello sir, Thank you so much for your awesome education. i am a newbie for wireless data like this. i don't know how to turning on Relay Module with bluetooth module are connected with ultrasonic sensor with bluetooth too. Sorry for bad english. Thank you.
Why do you want the voltage divider on the RX pin of the arduino? The arduino can receive 5V, can't it? You would want it on the transmit pin because the hc05 needs a 3.3V signal.
Thanks about your information and project , I have project its need 5 module bluetooth can be use it 5 Module and send data from every Module to Master Arduino to do something can be use it 5 Module ?
I followed step by step till 5:40, but when I powered up it always stays in command mode and won't connect :/. The LED doesn't flash as it does in the video. It flashes like it's still in the command mode (on and off for 2 seconds)... Can anyone help me with this?
On the LED side of life, you should NOT wire an LED directly to an Arduino output instead using a current limiting resistor. And in the actual sketch, you give up on an external LED and just use the Built-in LED attached to Pin 13. You should have clarified these points.
@@Educ8s Yes, I do see that in the video but as you didn't describe that current limiting resistor, I worry that new folks may destroy an Nano. And if you notice in your video later, the built-in LED is used anyway so the external LED is not used. Of course, I know you understand this.
how to find my address of my phone so that the HC05 can automatically connect to my phone...can we find the address of our phone with the BT turned on??
Code gives error even after i downloaded library, no problem with library but code shows error like this "Adafruit_SPITFT::::tft8' with constructor not allowed in union } tft8; ///< Parallel interface settings ^ Error compiling. " Please help
hey educ8s thanks for the video! just a quick question, a year ago you reviewed two books one being practical electronics for inventors by simon monk. I'm studying electrical engineering and i have a electronics circuits class next year and i want to get a head start. here's a description of the class "Introduction to electrical circuits and basic circuit elements. Circuit theory, analysis techniques, and introduction to design. DC analysis. First-order inductive and capacitive circuits. Operational amplifiers. Mutual inductance. Introduction to computer-aided design and analysis." would that book be worth my time or the Make: electronics books? or what book would you recommend? thanks. oh on a video a while back I suggested using the Microsoft Visual Studio extension called visual micro to program arduino and you said to let you know how it went for me. well i have to say i enjoyed it a lot, it has auto code complete and if you click on one variable you can rename every instance of that variable in the entire code, making things a lot easier, you should give it a try! thanks again
Hello my friend, I think that Practical Electronics is not the book you are looking for and I doubt that the Make book series will help you even though I haven't read them. Those books are mainly intended for practical applications. You are going to become an electical enginneer so you need solid theoretical knowledge. Unfortunately since I am a software engineer I can't help you with that. Thank for the info about Visual Studio. I will definately give it try! Cheers!
+Chrysippus The Esp32 provides bluetooth that's true. But the libraries to make it work are not mature. The libraries for the Arduino Nano on the other hand are very mature and you can build this project in just a couple of hours from scratch. At the cost of the project you also have to add the cost of the time needed. Because time has a cost as well. And if building this project with the old Arduino is 2$ more expensive, I prefer to spend those 2$ than spending a day debugging an immature library. This is just my opinion of course. Cheers!
You're absolutely right. Nevermind the bluetooth library, the other libraries (for anything besides bluetooth you might want to do) will be more mature on Arduino than on ESP-32 at this point. Both solutions can really coexist.
Nick, I think you have a graphical error and wiring error for the BT Master side. The +5v TX signal form UNO must be dropped to +3.3v for the HC-05 RX signal and you are attempting to use a simple voltage divider. While this is correctly shown at 0:05 time in your video for the Slave, it is shown at 0:10 time in your video for the Master incorrectly and both image files are shown incorrectly. If my understanding of what you are attempting to do, please reply. At risk is a lot of blown HC-05 BT modules unless they are somewhat tolerant of the wiring as shown wherein the 1k resistor limits current enough to save the BT module. YES/NO?
@@Educ8s Nick, just look at the schematic drawing for the programming of the HC-05 modules. There you will see the correctly used voltage divider on the RX signal of the module being programmed. And when you compare with the two schematics for the actual projects you will see that the Nano TX signal is placed at the node of the 2k and 1k resistors and the HC-05 RX is connected to the 1k resistor. This should clarify the sketches. And as I said in my comments about the LED, I don't want new folks to get confused or not be successful the first time they try. You do great work for sure.
I used a LCD Display and a dht21 its working but the Temperature is changing every 2sec from 16 to 25 °C can someone help me?.. (normally its about 24°C const)..
+JOAO GRANDAO It works outdoors as well.But for indoor use is better than the other wireless modules with the same range because it does not looses packages if there are walls between the modules!
Very Nice Video @educ8s.tv. I am curious to know whether we can use esp32 as master and arduino with hc-05 as slave like in this tutorial. If anyone have done the same please help me out or if you have any resources do share them in here.. Thank you in advance
The Bluetooth is easier to use, needs less wires to connect, does not use the SPI which is often used by displays, it works better indoors than the nrf, for example it can transmit through walls easily.On the other hand it has a range of around 10m which lower than the nrf24l01 in ideal conditions.
educ8s.tv less wires ? Ι thought the nrf uses the i2c protocol so only 3 wires less than the Bluetooth. Can you explain why is better to use Bluetooth indoors ? Its a matter of health from the radio waves that nrf transport ? I want to make a wireless remote control for my backyard lights and the door . About 5 buttons . Should I use the Bluetooth or the nrf ? Only the remote it will use batteries. Forgive me if I waste your time . And 1 more . Is it possible to connect my phones wifi to arduino with the nrf ? It basically transmit wifi waves right?
The nrf24l01 uses the SPI protocol not the I2C. The Bluetooth has better signal indoors, it does not loose packages even between doors, something that happens with the nrf. If your lights are less than 10meters from your remote, bluetooth is easier and it will work better in my opinion.
On Windows10 ??? BluetoothMaster.ino:80:40: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings] printText("o", ST7735_WHITE,90,19,2); printText("TEMPERATURE", ST7735_WHITE,30,5,1);
Hey guys! You can find the Schematics and the Code here: educ8s.tv/arduino-two-way-bluetooth-communication/
I appreciate your work, what i must change to use hc 12 ?
Thanks for the explanation - I'm going to use this to isolate a sensitive sensor array from a separate high current control array for a home made accelerated composter
Όπως παντα ακομα ενα αριστο και ευχάριστο βιντεο...Συνεχισε την αριστη δουλεια
Everyone is using Androids. It's about time we actually find out how to connect our projects together.
This method to teach was great.
The nrf24l01 modules are less expensive ,their code supports error checking and they are less power hungry. The disadvantage of course is that Bluetooth is everywhere and you can control it with eg. your smartphone or computer whereas the only way you can control the nrf24l01 is with another nrf24l01.
The other option is ESP8266 WiFi, but its not as power efficient as NRF24L01+
Venkatesh E I tried to build remote switches and remote thermometers, so I bought a bunch of nrf24l01 but in hindsight I should have gotten wemos d1 minis or equivalent. The nrf24l01 are a pain to connect to the internet whereas the esp8266 has the TCP/IP stack built-in
ttlog. are the wemos d1 minis capable of operating in master mode? or is the term for this mode station ?
I wanted to say almost the exact same thing. The range on the nrf23L01 is also better than bluetooth, especially when you have a 'real' antenna connected to it. For RC toys that run outside, I would say the nrf23L01 is superior to Bluetooth. In theory it could go as far as 10 km according to this video: th-cam.com/video/zddC8rQasrg/w-d-xo.html. Great video though, for our bluetooth needs!
johnny wonka You don't need master and slave modes. You just need the IP the wemos gets from your router if you are indoor. You can make the esp8266-01 operate in master mode with AT commands. I assume someone has tried it with a wemos. Google is your friend.
I have a power consumption meter that I would like to read wirelessly. These modules seem perfectly suited for that.
Yes, man, I am finding the video substantially useful, thanks!
Hey, I love your videos and the information is fantastic. I always look forward to your videos. One comment on the future project for the tank, I would recommend looking into using the ESP8266 and a Access Point (AP) connection for communication -- I think it would be much easier and you will probably get better range. Also, you would get to use a much faster processor of the Wemos D1 Mini.
Yes, thank you for your tutorials. They offer much insight into IoT things. Would be nice to see this using a now available BlueTooth 5 module to get much further reach for sensors outside of 10m distance. Great tutorial thx!
Thank ypu very much for your work, i will be using it for a bt controller with an arduino car
Nice video. At 3:42, your voiceover should say 38,400, not 34,800, but IMO it's pretty minor and most will understand what's needed there.
Thank you for showing connecting two modules instead of connecting with a 3rd party app. Also, thanks for explaining how to set it up acknowledging easy mistakes.
The other best option (for short and long range) is HC-11/12. This module communicates on UART and super easy to transfer between two MCU's and it can go upto 1 or 1.5 KM (depends on speed).
Yes I have heard about it. But it is illegal to use it in Greece and in many countries at its full power so the range will be much less.
Oohh 1,5 km ? Can use it as rc for mini drones so they can fly farther?
great video - have you tried faster bit rates than 9600 with the modules? whats the fastest they can do at the 10m range?
I'm building this, thanks Nick!
Thank you for a clear and good explanation.
May I ask what do I need to chage, if I have lcd display
Dear educ8s.tv your tutorial are amazing. So now I'm tring to make communication two arduino with RS485 and got a trouble. Could you make some lesson with this protocol? Thks in advance
Hello , please do you have Tutorial of 2 arduino nano 33 ble sense , how send the data via BLE ?
2:46 Schematics is wrong! RX to RX and TX to TX ?
Hey buddy what if i want to records temperature change periodically, how can i add a memory card over there ?
Before pressing upload remove the wires from the serial port of the Arduino board and connect them again after the sketch has been uploaded. So my question is which wires, all of them or?
Thanks a lot. I need the same bi directional transmision for an application that I'm building. The video was very useful, it's very clear.
Thanks for this great useful understandable basic explanation :)
Hi, that was a great tutorial and I think I will be using Bluetooth for my Boat Systems monitor. I was going to use the NRF24L01 but when I realise the maximum data packet size was only 32 bytes I realised it would be too difficult for me to implement. I'm needing to send and receive at least double that amount, but only across 3 metres. Do you think the bt protocol is best?
Great tutorial. I am going to build a remote monitor for my beer brewing system.
Έχεις τρομερή μεταδοτικότητα! 1000 likes
excuse me, how about using the mlx90614 infrared sensor?
Great video and tutorial. I love your enthusiasm!
can you use softserial transferr and use the easytransfer ET in and ET out together to achieve two way communication ?
Brilliant Nick. Love the videos. Please keep up this excellent work. Lee
+Lee Hewitt Thank you very much my friend!
Awesome video as always!
Hey ,i tried your project but it cannot uploaded to my board , always shows that "error compiling for board Arduino UNO" , other programs work fine but this cannot uploaded ,please help
How to transmit digital audio to bluetooth earphone?
Can I use hc06 instead of hc 05
Very nice video. is 10 meters the max can be achieved? Can we set the baud rate of the BT modules to lower rate to increase the length?
Hello sir, Thank you so much for your awesome education.
i am a newbie for wireless data like this.
i don't know how to turning on Relay Module with bluetooth module are connected with ultrasonic sensor with bluetooth too.
Sorry for bad english.
Thank you.
Why do you want the voltage divider on the RX pin of the arduino? The arduino can receive 5V, can't it? You would want it on the transmit pin because the hc05 needs a 3.3V signal.
I appreciate your work, what i must change to use hc 12 ?
RX and TX wires need to be cross connected
Oled not displaying when Bluetooth connected to Arduino,oled displaying when Bluetooth removed.
nicely done. It is something i am working on. Is it possible to connect a led to the master, so it would lit up when a critical temperature is set?
+Mohammed Zaman yes of course you can do this
Is this possible that master will send/receive data to/from more than one bluetooth module. if so then how?
Thanks about your information and project , I have project its need 5 module bluetooth can be use it 5 Module and send data from every Module to Master Arduino to do something
can be use it 5 Module ?
I followed step by step till 5:40, but when I powered up it always stays in command mode and won't connect :/. The LED doesn't flash as it does in the video. It flashes like it's still in the command mode (on and off for 2 seconds)... Can anyone help me with this?
is it possible to control a relay on the server by a set temperature on the client?
On the LED side of life, you should NOT wire an LED directly to an Arduino output instead using a current limiting resistor. And in the actual sketch, you give up on an external LED and just use the Built-in LED attached to Pin 13. You should have clarified these points.
Thanks for the comment. If you watch closely I have soldered a current limiting resistor to the one leg of the LED. Yes I could use pin 13.
@@Educ8s Yes, I do see that in the video but as you didn't describe that current limiting resistor, I worry that new folks may destroy an Nano. And if you notice in your video later, the built-in LED is used anyway so the external LED is not used. Of course, I know you understand this.
Hi sir nice tutorial..easy transfer is still working?i ive try to use it but i cant transfer data..can you help me sir..
Hello, Is it possible to do the same thing with the HC-06 Bluetooth ?
My modules are connected, my code is works as well but system didn't work
Very well done, thanks
Thanks for sharing your knowledge. :)
Awesome job Bro..
how to find my address of my phone so that the HC05 can automatically connect to my phone...can we find the address of our phone with the BT turned on??
Very useful, thanks!
You are welcome!
Code gives error even after i downloaded library, no problem with library but code shows error like this "Adafruit_SPITFT::::tft8' with constructor not allowed in union
} tft8; ///< Parallel interface settings
^
Error compiling.
"
Please help
is there a way to use the H05 as master and use a H06 as a slave ? if so how do you link the two, reason being you cant get an address from the H06.
+johnny wonka You can use your smartphone to get the Mac address of the HC-06 module! Cheers!
can we make multiple Arduino's to communicate with each other using Bluetooth
can i replace the DHT-22 with BME 280 does is still work the same?
Καλησπέρα. Ενα απλό παράδειγμα! Πως μπορούμε να στείλουμε δεδομένα από το arduino σε android συσκευή ;
Hello
Please help by typing the code using the lcdi2c instead of the TFT
Thanks for video.
This does not work at all for me. I followed both the schematics and code but nothing works
this is interesting...but can one bluetooth on an arduino to multiple arduino installed with bluetooth
hey educ8s thanks for the video!
just a quick question, a year ago you reviewed two books one being practical electronics for inventors by simon monk. I'm studying electrical engineering and i have a electronics circuits class next year and i want to get a head start. here's a description of the class "Introduction to electrical circuits and basic circuit elements. Circuit theory, analysis techniques, and introduction to design. DC analysis. First-order inductive and capacitive circuits. Operational amplifiers. Mutual inductance. Introduction to computer-aided design and analysis." would that book be worth my time or the Make: electronics books? or what book would you recommend? thanks.
oh on a video a while back I suggested using the Microsoft Visual Studio extension called visual micro to program arduino and you said to let you know how it went for me. well i have to say i enjoyed it a lot, it has auto code complete and if you click on one variable you can rename every instance of that variable in the entire code, making things a lot easier, you should give it a try!
thanks again
Hello my friend,
I think that Practical Electronics is not the book you are looking for and I doubt that the Make book series will help you even though I haven't read them. Those books are mainly intended for practical applications. You are going to become an electical enginneer so you need solid theoretical knowledge. Unfortunately since I am a software engineer I can't help you with that.
Thank for the info about Visual Studio. I will definately give it try! Cheers!
Good stuff! Subbed
Is there something the HC-05 module can do that an ESP-32 cannot do? Because, I believe an ESP-32 board is now cheaper than a Nano and an HC-05.
+Chrysippus The Esp32 provides bluetooth that's true. But the libraries to make it work are not mature. The libraries for the Arduino Nano on the other hand are very mature and you can build this project in just a couple of hours from scratch. At the cost of the project you also have to add the cost of the time needed. Because time has a cost as well. And if building this project with the old Arduino is 2$ more expensive, I prefer to spend those 2$ than spending a day debugging an immature library. This is just my opinion of course. Cheers!
You're absolutely right. Nevermind the bluetooth library, the other libraries (for anything besides bluetooth you might want to do) will be more mature on Arduino than on ESP-32 at this point. Both solutions can really coexist.
if there is multiple Slaves how Master will receive data ???
Video starts at 0:45
how can we store the received values of sensor?
Nick, I think you have a graphical error and wiring error for the BT Master side. The +5v TX signal form UNO must be dropped to +3.3v for the HC-05 RX signal and you are attempting to use a simple voltage divider. While this is correctly shown at 0:05 time in your video for the Slave, it is shown at 0:10 time in your video for the Master incorrectly and both image files are shown incorrectly. If my understanding of what you are attempting to do, please reply. At risk is a lot of blown HC-05 BT modules unless they are somewhat tolerant of the wiring as shown wherein the 1k resistor limits current enough to save the BT module. YES/NO?
Maybe you are right. I have to rebuild the project to see what's going on.
@@Educ8s Nick, just look at the schematic drawing for the programming of the HC-05 modules. There you will see the correctly used voltage divider on the RX signal of the module being programmed. And when you compare with the two schematics for the actual projects you will see that the Nano TX signal is placed at the node of the 2k and 1k resistors and the HC-05 RX is connected to the 1k resistor. This should clarify the sketches. And as I said in my comments about the LED, I don't want new folks to get confused or not be successful the first time they try. You do great work for sure.
thank you
Very useful. thanks
You are welcome!
hay how to transfer 5 pot values to master...? any idea
tank u so mush
Can I log the temperature easy from more than one room?
Somebody that can send me a link?
How to display two different sensors?
I used a LCD Display and a dht21 its working but the Temperature is changing every 2sec from 16 to 25 °C can someone help me?.. (normally its about 24°C const)..
how can we do that with HC-06 module?
hello, excelent vídeo, 1 question, why it's only for interior?, thank's a lot.
+JOAO GRANDAO It works outdoors as well.But for indoor use is better than the other wireless modules with the same range because it does not looses packages if there are walls between the modules!
great!!. thank's a lot and hello from México
thank youuu
if i have 2 HC - 06 Bluetooth, can i do this?
+alex lux Unfortunately you can't . The Hc 06 is cannot be set to master mode. But if you have an hc 05 set as master it can bind with a hc 06
Trabajo excepcional
+Gustavo Zaraza Muchas gracias!
The Easy transfer not working
Can we send messages / files using arduino, tft and hc05 modules?????
Please reply..
Yes you can.
@@Educ8s can you provide the program , please?????
Very Nice Video @educ8s.tv.
I am curious to know whether we can use esp32 as master and arduino with hc-05 as slave like in this tutorial.
If anyone have done the same please help me out or if you have any resources do share them in here..
Thank you in advance
do you know where i can find google source code to do one side like in your system? Thanks for any reply!
Check the video description ;-)
I would like to try this with 2 ESP32 (Lolin)
What are the pros or cons of Bluetooth vs nrf24l01 module . The nrf I think reach up to 50meters
The Bluetooth is easier to use, needs less wires to connect, does not use the SPI which is often used by displays, it works better indoors than the nrf, for example it can transmit through walls easily.On the other hand it has a range of around 10m which lower than the nrf24l01 in ideal conditions.
educ8s.tv less wires ? Ι thought the nrf uses the i2c protocol so only 3 wires less than the Bluetooth. Can you explain why is better to use Bluetooth indoors ? Its a matter of health from the radio waves that nrf transport ?
I want to make a wireless remote control for my backyard lights and the door . About 5 buttons . Should I use the Bluetooth or the nrf ? Only the remote it will use batteries.
Forgive me if I waste your time .
And 1 more . Is it possible to connect my phones wifi to arduino with the nrf ? It basically transmit wifi waves right?
The nrf24l01 uses the SPI protocol not the I2C. The Bluetooth has better signal indoors, it does not loose packages even between doors, something that happens with the nrf. If your lights are less than 10meters from your remote, bluetooth is easier and it will work better in my opinion.
educ8s.tv thanks ! I' ll go with Bluetooth. What about the phone , can I conect wifi to nrf ?
You are welcome. I think it is not that easy to do it but I haven't tried it.
Why didn't you mention what resistors you are using?
Check the link in the description. I forgot to write the resistor values in the video.
On Windows10 ??? BluetoothMaster.ino:80:40: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
printText("o", ST7735_WHITE,90,19,2);
printText("TEMPERATURE", ST7735_WHITE,30,5,1);
hi ,
i got this error! please help
Error opening serial port 'COM7'. (Port busy)
Reconnect arduino then connect it choose a port form tools like this
Tools --> Port ---> (Choose your port)
Something else is using that Port while you are trying to access it
You dont upload new video every saturday now ??
Hello, I now publish a new every 14 days. Check this video for more info: th-cam.com/video/eugMyWvoyP0/w-d-xo.html
@3:40
38400
Can it be possible to send info from two slaves to one master?
This inspired me to make a bluetooth airsoft gun, I made a video about it. Check it out!:) thanks!
Hi Nick, do you have an email I can contact you with?
Check my website!