Electronic Basics #4: Arduino+Bluetooth+Android=Awesome

[@FumetsuNoAnataE]

GreatScott's definition of "Basics" = "Archmage in Electronics"

[@knaadhan2918]

I'm just 16 years old, I understood your code and connected the module just as like you told and it worked perfectly. Your videos are really awesome, easy to understand not very complicated.

[@tj-xn2jb]

Can you teach me

[@Jeevan24]

Live from India! I'm your subscriber for past 6 months and I'm well satisfied with your videos and those all videos were super and awesome... 😍😍😍😍

[@tysinner]

GreatScott.... you deserve a million subscribers!.... for all that hard work you do...

[@MrPlastkort]

soon :-)

[@leplayz4499]

I'm from future. He has 1 Million subscribers now!

[@KasisnuSingh]

This is the most awesome resource I've come across for working with the HC-05/06!

[@toadiri]

Another great video scott :) never stop dude, we need to learn all this stuff

[@shader26]

Great video. Would love to see one where you read from Bluetooth too. Actually I have a project, totally new to Arduino, where I want to use an SD card shield to log readings, and BT to read them over to my phone. It’s important too, it’s a septic tank where I plan on using sensors for distance, and not have to remove the top anymore and look down there!

[@Jwett_Baby]

Did u get any info

[@shader26]

@@Jwett_Baby hi. No. I mean I am in process of figuring it out. I made a prototype with Arduino Uno and a HM-10 “shield” and got it working great. But when I wired up the “final product” where I use an Arduino Pro Mini and HM-10 it’s been problematic. Telephone BLE apps aren’t getting replies, not for AT commands, nor to talk to the Arduino sketch program. Too hard to detail here but am trying many things now to see if it is as dumb as CR and LF messing up the hm-10 sending commands (defined in the sketch) further to the Arduino. Like I said, prototype works great.

[@sebastiankranzinger3844]

"But I have to say, those things are fragile objects!" *throws them on table*

[@carlabihawbar7459]

He was saying fragile for voltage

[@ammeydan]

a kind of a late comment, but you deserve it! i have just built this circuit with your code and explanation and it works great. thank you for teaching us so much about electronics and its awesomeness... love your videos, keep up the good work.

[@pastvanity]

you don't have the slightest clue how much you helped me!

[@semphony100]

thanks mate that was by faaaaar the best arduino bluetooth tutorial for beginners ever finally after a lot of search i was able to replicate this project and get my phone to communicate with arduino thanks a lot.

[@Kendric777]

Got to say dude I love your videos, keep up the good work.

[@jianyu1398]

Thank you so much! The voltage divider is super helpful and saved me the trouble!

[@SpacePumpking]

Just getting started with the arduino and such for a lighting project, I found this video very helpful for hooking up the arduino+module. I can't seem to understand what all the hate comments are about. The only slight issue I'm having is reliablility (getting incomplete messages), but this maybe a faulty device or software on my behlaf

[@ayushpoudel7129]

You are good at electronics and watch TBBT.You are cool and intelligent.How freaking cool is that

[@melplishka5978]

Awesome vid Scott. Your work with arduino is amazing.

[@dreamcatcher8385]

hi scott,,u r really g8..i watched all ur 25 electronic basics..thank u so much for ur help and effort....thank u

[@Johnathonkolegraff]

This is the clearest video tutorial I have seen to date. Can you make one for the WIFI? Thank you.

[@greatscottlab]

djthoth1 I will think about it.

[@gaetanocaccavallo4772]

HI, i'm new into electronics. I've got a question. I tried to make a voltage divider with 2k and 1k resistors. The ratio is the almost the same. Is there any motive to use 4.7k and 2k resistor like you did? or i's the same?

[@peepopalaber]

Danke! Genau nach so einem Tut habe ich gesucht :)

[@sachinreddy2836]

Dude thanks man. Earned a new subscriber

[@jaymanthefreak]

I believe that the IOs are 5V tolerant. You don't need the voltage divider - though it does not hurt anything :)

[@egonsvensson2728]

Nice BT-work ;) It's a little bit frustrating to remove the Tx and Rx-cables all the time while uploading new test-sketches, so I had to include the SoftwareSerial library and use 2 other pins for communicating *Problem solved* :)

[@greatscottlab]

Egon Svensson Good idea!

[@mihirbosemj]

Can the bt module be used with a standalone arduino which doesn't have usb to serial conversion chip?

[@didierrechatin9765]

Like the whole concept (the video AND the way to get some contribution)...If I buy I will definitely buy from you

[@TheNinjai74]

Yes it does look Freakkin awesome!!!!!!

[@ynzeselders4184]

I tried it and it worked great! Thank you

[@ascaniofiori6528]

Vielen dank. Das sketch ist toll !

[@AdventuresOfHari]

HEY GREAT SCOTT!! UR VIDEOS ARE JUST AMAZING!!! LOVE WATCHING THEM AND THE LEARNING PROCESS JUST GETS BETTER!! DO U HAVE PLANS OF MAKING A SMART WATCH WITH ARDUINO ANYTIME ?? WITH A NOKIA 5110 LCD ,BLUETOOTH MODULE AND AN ARDUINO PROMINI... IT WOULD BE REALLY GREAT IF U LET US KNOW HOW TO GET ONE WORKING!!

[@leestons]

Why are you typing in all caps you irritating dickhead.

[@powderhond]

I live all your videos but as someone who starting to learn electronics its sometimes a bit complicated. Could you make some "basics" videos that start from the beginning like the real basics.

[@Jwett_Baby]

Deffinatly

[@Vojin-sb2lo]

I made something like this but voice control. I used arduino uno. It often turns light blue if i say red. Its so cool: Thank you :)

[@SkjoyBd]

Great video. Keep up the good work.

[@johnnyclean8233]

Hmm cool little project. Thanks for the tutorial!😀👍

[@KarlsLabReport]

VERY useful stuff! Thank you!

[@DamaKubu]

Omg I love u scott just what I needed

[@elecnut8211]

Love all the great info but at 2:10 you are showing a 5 pin module. should it be a 4 pin module ?

[@xinjundong3065]

I might miss the description, but I did not see the link in the description. Would you please send the link again? Thanks

[@jamesnewton5245]

hi thanks for this upload got it working straight away using your code!!! amazing!

[@bretthouser13]

I could really use the theory behind the voltage splitter. An equation on the resistances would be excellent.

[@KorvusTheMad]

Vout = Vin(R2/(R1+R2))

[@davebacknolaliki1452]

Note that this is completely okay for logic signals as he is doing here that you’re simply reading but this is not something you would want to use if you are providing power to a load. Since the current through a load may vary, so will the resistance in parallel with “R2” which will throw your voltage divider off. A voltage divider is not regulated and you will effectively be making a variable voltage at the point your supplying that voltage from. Also in higher current applications you’re wasting all of that power as heat, nothing that we would really see here with this setup. Voltage dividers are also used on the gate side of a mosfet for noise reasons when using it as a switch or for DC biasing when using it as an amplifier.

[@hansmosayolang9387]

Awesome dude this is so helpful :D thanks!

[@TorIvanBoine]

Any idea why the bluetooth hc-06 disconnects after just a minute? Been googling for days without a hint of answer

[@rajeshkalita4851]

Had the same problem. The module turns on and disconnects even before connecting. Turns out that the module is bad.

[@TorIvanBoine]

@@rajeshkalita4851 I can interact with the two modules I have. It only disconnects when idle (20seconds) haven't figured out why

[@rajeshkalita4851]

If during operation, the device connected to the module runs into sleep mode, the module will disconnect on its own.

[@TorIvanBoine]

@@rajeshkalita4851 do you have or know of any documentation on this? I have scoured the internet and found zilch

[@rajeshkalita4851]

Haven't got any documentation. Sorry. But in my case, the HC-06 actually disconnects from the device, in my case, cell phone, when the cell phone goes into sleep mode.

[@mohamedfaroukel-alem7253]

I would like to thank you very much for your valuable explanation :)

[@greatscottlab]

Mohamed Farouk El Alem You're welcome! ;-)

[@MOJICA7257]

Teach me Master :D

[@WhiteLie---------------------1]

I want more master i need it #_#

[@refayat7777]

Thank you for the wonderful intro video. I needed to know which bluetooth module can pair with Iphone. Do you happen to know any specific bluetooth shield? The ones that you have used, are those specific to android only? Thank again for your time.

[@InventionTherapy]

What is the best Arduino to start learning on?

[@Hackaprende]

This video is really great!!, do you have another tutorial for sending information from the arduino instead of receiving it?

[@greatscottlab]

Almaral Engineering Not yet.

[@luckylukas92]

Almaral Engineering if ur using the same bluetooth module it's super simple. simply use serial write as u usually do at arduino's. It will automatically forwart the uart signal via bluetooth.

[@daixtr]

+GreatScott! Does it mean, that if the direction of transmission is from arduino to celphone then i would buy a master mode bluetooth module?

[@brendandavidson6449]

Where is the sketch that you used in the video? I used the link in the description and it wasn't the same sketch. Any help would be great! I love your videos! Thanks!

[@greatscottlab]

+John Davidson The description should offer the same sketch

[@farhankhatri4937]

+GreatScott! hey ! greatscott where did you learn all your arduino codes from ?

[@B0A2]

This tutorial is excellent thank you so much

[@IReallyLikeWaffels]

hey could you make a video on a desktop/ or even portable remote for this system where you only need to press a button/ turn a dial to change the lights? that would be much cooler than typing text in a terminal app

[@Debrugger]

Can you please make a video about how to make to arduinos communicate (i really just need a serial connection to either send a 1 or a 0) with these modules without a smartphone?

[@drdin3442]

Ok I'm an electronics noob so sorry but I have a question. When you connect a normal led it doesn't matter if you connect the resistor to the anode or the cathode so why does he put a resistor on each of the leads instead of just putting one on the common lead?

[@greatscottlab]

+LASER BEAR ASSAULT UNIT Because each color has an individual voltage drop that defines the value of the resistor.

[@greatscottlab]

+LASER BEAR ASSAULT UNIT Because each color has an individual voltage drop that defines the value of the resistor.

[@drdin3442]

GreatScott! oh, ok thanks

[@TheEnragedGamer]

+GreatScott! I'm thinking about buying a clone ardruino nano off banged and I'm wondering if you have a ardruino project playlist

[@spiousas]

Scott! Hi and thanks. The sketch link does not seem to be working, could you fix it?

[@greatscottlab]

No, works without a problem

[@spiousas]

Sorry, in fact the site was blocked by the firewall at my university. Thanks!

[@gaborhajdu586]

maybe someone already asked this... can you make the program to look like a controller? And are you able to transmit video to your phone?

[@MadPiano1]

How did you make an Android app to connect it to Arduino? Did you use Android Studio?

[@greatscottlab]

John Paul De Leon The app already exists.

[@MadPiano1]

Are you the developer of the app?

[@greatscottlab]

John Paul De Leon No

[@DerekWelchElectric]

Worked great thank you very much sir.

[@JohnSmith-he5xg]

Sweet, was wondering how to do the logic level conversion. Super simple and clean. Was also not sure it would work given the high Z of the input pin, but wiring the divider between VCC and ground makes a lot of sense. XD

[@messcommand7819]

GreatScott!

[@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.

[@nehagoel3265]

you can use a voice recognition module

[@raulcab.672]

where can i learn more about those arduino things? That from 1:20 and also what is that white board in wich he plugs everithing

[@ElectronicsCuriosities]

Nice video 👍👌

[@jumbo999614]

I saw some diagram show that you need 1k+2k to create divider. But in this video you use 4.7k + 2k. Is there any difference? Also function allpinslow() but it sets all to HIGH which is the opposite of the function's name.

[@lozbrown1985]

Do you think you could combine this with some of your other tutorials to make a wireless bluetooth ambilight clone?

[@ruturajyellurkar9588]

do we need to include the softwareserial to get the Bluetooth module working.

[@sayantanmaiti2513]

Awesome one working so nicely, can u plz suggest me whether I can produce more colours with it .

[@ninovitaliano7943]

How do you connect cathodes to positive outputs of the arduino? Arduino outputs 5v not 0v

[@brendandavidson6449]

+GreatScott! OK, the sketch that I downloaded didn't look like the one that you were using. That sketch only uses a single color led and I send 1’s or 0's. Even that didn't work. I am a beginner at electronics and I like your videos because they are informative and it is a nice thing to watch. Thanks!

[@harmonygears]

Could you make a video about the AT commands? I don't found a way to change the name of the modul. I found the right AT Command, but not how I transfer it through the serial monitor to the bluetooth modul.

[@Ray-by2ix]

Hi... I got a question that I think you could help me. I have an Arduino project with the Fingerprint module. After i finished it, I want to register a new fingerprint to my project but I want to do it without connect it to the computer. But I want to register it through Android Application that I made using the MIT APP INVENTOR. After that I am confuse at how to write the Arduino code ... So I really hope that you can help me to finish this project

[@tarandeepkalra370]

I implemented your code and worked the same way but with arduino uno.The code has been uploaded successfully but nothing is happening.Also on the android serial app as soon as i am typing the command red or green,a white question mark in a red diamond is coming up as in this video on your phone .How did you solve this problem?

[@eddetuinman7772]

Can I also use a hc-05 bleu tooth module

[@kbssaprodussoes]

Hi, greatscott, huge fan of your videos here, i downloaded your code and i see that is inverted, when you write the collor in fact the pin for the collor turns LOW, my question is: it is really inverted or I am doing something wrong? :D

[@erin2150]

What language are you using to program with for electronics?

[@Md.NazmusSakib]

Hello sir, My robot is working correctly by android but when i recieve srial data by bluetooth then it transfering data...but when i command by android and sent data it doesn't recieving...what is the problem? Please help!

[@SteffoSpieler]

Was zählt denn zu 5 Volt Daten? Ich betreibe mein Bluetooth Modul ohne das extra und es funktioniert super!

[@doubledipchips]

can you just use BLEduino instead of the arduino nano and bluetooth module to get same results?

[@greatscottlab]

Bleduino is capable of doing the same stuff I do with those two. But I am not sure whether the code will work. Propably not.

[@zaboky]

can you use attiny85 with this bluetooth module to control, lets say, leds?

[@VISHESHKUSHWAH]

Sir,Isn't there any simulator that includes module components so that no hardware requirement would be there.I liked the video.

[@a..d2062]

Just to let u all know the baud rate must be put to 38400 for it to work

[@Yeetely_deet]

TKS

[@Bishy.222]

My WEMOS board wont even turn on if the voltage divider is connected. Do i really have to disconnect and reconnect every time I want to turn on my lights?

[@louisferreira1012]

could this be adaptable to a Digital Potentiometer function where instead of controlling whether the LED is on/off, it could send signals to tell the digipot whether to increase or decrease its resistance? thanks

[@aduedc]

I wonder if you know how do you make master blue tooth device with Arduino? I am designing a phone and need to connect it with blue tooth headphone and mic. How to pair head phone and mic with arduino.

[@skatefreak381]

is there also a way to do this with an iphone and what app should i use

[@ENTIZStdio]

I have bought HC 05 and a arduino uno . connected both and copied a working code. It works well when i use the serial monitor but the values send my phone aren't recieved or some blocks appear. When i send some words like hhfg it reads 1 sometimes or just a block show up. I directly connected the tx rx pin to rx tx of arduino. Can i get some possible error on this

[@tbmtech5651]

Great video!!! thank you for sharing!

[@TimothyCareyDV]

You have a list of hardware and where do I find your code. I know something about electronics, but need a starting point for your project. Never have used arduino and just getting into making apps.

[@supercomputer3476]

It works so fine! I build this too and it is awesome!!!!! Thank you for your cool Video! And make more Videos!!!

[@iliazark1]

what are the tow last lines of code inside the ''void loop'' for.What deos this ''check_protocol'' mean. I am trying to build my own program but everything i send gets converted into single digits or single letters. for example( 1234-> 1 2 3 4)

[@ABC-vd1zl]

First time I noticed you're from germany! Do you mind asking where you are from?

[@janekwegrzyn9737]

You watch Big Bang Theory too? Such a great show!

[@MrSamuel9126]

The arduino nano gave me problems with it's integrated FTDI serial to usb chip regarding the drivers. I used the nano 3 but the clone version

[@ychannel5851]

First of all thank you for the video and the code but I have one problem; I used three LEDs and when I send the code one LED goes off (the others keep shining). Please help me, thanks!

[@ahmetselim1166]

do I have to use resistors and I couldn't find 2K resistor is there any option left for me?

[@consig1iere294]

Is it possible to make a multi-channel bluetooth audio receiver with Arduino? The ones they sell on Ebay is just stereo.

[@gaganpe114]

I always get the same response when trying to communicate with the board... its an 80 in ASCII. its the same code and everything and the response is same for any command i send through the terminal. What did i do wrong

[@mariosuperheld]

I wanted to ask if you also speak german, because I saw some german text in some of your videos. By the way great video!

[@greatscottlab]

Thanks. Yep, I speak german pretty decent.

[@mariosuperheld]

Are there any plans to make the videos also in german?

[@greatscottlab]

Well, I will start to add german subtitles in three weeks.

[@mariosuperheld]

Thats sounds great. Thank you a lot ;-)

[@eeshanej3506]

what software do u use to edit your videos

[@garygrotsky4081]

Love your video, very well done,. Just one question,. Is there A similar app for iOS devices?

[@greatscottlab]

+Gary Grotsky Sorry but I am not familiar with iOS devices

[@MuhammedBasilKB]

+Gary Grotsky iOS doesn't directly support SPP modules like the one used in this video. Though, there might be some workarounds.

[@furquanrazvi2893]

Hey the audriuno sketch link is not working ..........plzzzz look into it.....really in need of it ........thanks

[@lovro164]

try install arduino ide 1.0.6 (the old one) it worked for me

[@bigmulujamesjimmy]

Great job! including sheldon coopers confirmation on bluetooth, how can i get a schematic for this in jpg or pdf from you i could use this for my studies please.

[@Omarbg95]

Can you use the Arduino to Detect distance between bluetooth devices? or use it to detect where are the bluetooth devices? :D

[@rangeispow]

Would everything work fine if I use 3V into RXD? I don't have a 4.7k resistor so I'm using five 1k resistors to get 3V.