Door lock keypad and bluetooth Arduino tutorial

7 років тому

A simple door lock using a keypad to insert the password. You can find all the schematics and extra information dowon below. This system also works with a bluetooth module. The android App is down below ready to download. Install it to your smartphone, mount the bluetooth scheamtic and install the system to your door.
Canal en Español: / @electronoobsenespanol
my Q&A page: electronoobs.com/eng_preguntas...
Help me on Patreon: www.patreon.com/user?u=4854866
Website page: www.electronoobs.com/eng_ardui...
Create your app video: • Create a Bluetooth App...
Keypad schematic: www.electronoobs.com/images/Ar...
Bluetooth+keypad schematic: www.electronoobs.com/images/Ar...
Door lock code: www.electronoobs.com/images/Ar...
Bluetooth door lock code: www.electronoobs.com/images/Ar...
i2c liquid crystal library: www.electronoobs.com/images/Ar...
keypad library: www.electronoobs.com/images/Ar...
Door lock App: www.electronoobs.com/images/Ar...
_____MATERIAL_____
i2c LCD: www.ebay.com/itm/Yellow-Displa...
Servo motor: www.ebay.com/itm/SG9-Mini-Gear...
Arduino NANO: www.ebay.com/itm/Nano-V3-0-Min...
Keypad: www.ebay.com/itm/4-x-4-AVR-16-...
Bluetooth module: www.ebay.com/itm/1pcs-HC-05-Wi...
I hope you enjoy my videos. Like, share and subscribe and motivate me for more videos. Thank you guys!

КОМЕНТАРІ: 364

@ELECTRONOOBS 6 років тому

sometimes the slave adress is not 0x3f. So change it to 0x27 if it dosn't work when using this function: LiquidCrystal_I2C lcd(0x3f,20,4);

@dvirnissan815 6 років тому

im getting an error that says : exit status 1 stray '\357' in program How do i fix this?

@devashishsamanta5319 6 років тому

Electronoobs can u tell me where the lcd input address is there in code

@andreamitchell4758 6 років тому

is the "active buzzer" just a piezo speaker?or is there more to it or can i just hsarvers the piezo disc speaker out of something? also will the .ino fit on a pro mini?

@jayakrishnakumar2712 5 років тому

can u do the same with esp32

@vishalkathpalia8459 5 років тому

bro i find an error from keypad library.

@pauloesperon7697 5 років тому

awesome video man, you are very thorough

@vishaljain6130 2 роки тому

Really awesome, I like most. Your project perform superb. Thanks a lot Guy.

@johnburks3569 6 років тому

Very nice video. It was very straight-forward and easy to follow. What do you think about entering the key code through the android app? Would this make the system slightly more secure?

@mattshumway2296 5 років тому

THAT IS A AWESOME INTRO

@lewismurimi2518 6 років тому

so nice. could you please list the specifications of all of your components as well as a full program for the lock system. i'll be grateful. thank you

@rohwebs123 6 років тому

thanks electronoobs. you are a versatile genius. but i have one doubt how to mount the servo motor to the lock

@jordankennedy3867 4 роки тому

Hi Electronoobs first off great video. Helped me set up my arduino project. I altered the code to fit what I was wanting, erasing the electronoobs on the LCD and stuff. So far I've gotten the keypad to open and close the servo and the inside open push button to open the servo. But I have been unsuccessful on getting the close button to work properly. It could be the code but I'm not an expert. Any Advice?

@tonyinfo1016 7 років тому

ta vidéo ma plu et elle est supère !

@TrisCalangi 3 роки тому

Good day! I'm planning to use this type of project for my thesis. I just wanna ask does the emergency button for opening the relay have a time before it closes? Or does this button let's the arduino think that someone inputted the correct pincode and then it closes with the programmed time?

@pasindubhagya5890 6 років тому

Thank you Bro it's very good for me....

@sunnykhatri9449 5 років тому

U saved my lif🤯

@MsSTEFAnCO 7 років тому

You are absolutely brilliant !!

@ELECTRONOOBS 7 років тому

Стефан Бакарджиев :o thank you very much! your comment motivates me!!!!

@ELECTRONOOBS 7 років тому

Thank you very much!

@rodrigojaime6768 3 роки тому

Man you are god for me ty so much

@teenagewoodworker7887 7 років тому

But I'd also recommend an IR receiver and transmitter

@akshayghorpade5798 5 років тому

I HAVE an idea which is to good for your next tutorial OTP based door lock system . i am waiting for this tutorial bcoz now a days OTP is one of the best thing use as security ....you .will be the first one on youtube........who make this happen with arduino .....

@moazelsawaf2000 5 років тому

Thanks a lot ❤

@sugarmonkey 7 років тому

creating a casing for that sure make it the best:))

@ELECTRONOOBS 7 років тому

Thank you very much.

@riship7767 5 років тому

Is it better to program the arduino board before the wires and components are connected or after

@awesomereader798 3 роки тому

Would you be able to use a passive buzzer in this project? I only have that.

@sannyoinvent9196 7 років тому

thanks bro I like your video

@thetechboy8529 3 роки тому

Thanks I will try it for my room

@vedatorpeta 5 років тому

It is very good tutorial. I saw a lot of tutorials about arduino, but this is most synoptical :)

@abdulghanijamal7138 3 роки тому

Hey can u pls tell me how to change the password in the code and when I connect the two push buttons the buzzer just makes a sound without pushing them. Pls help I’m just 13 and want to learn coding. =-)

@abdulghanijamal7138 3 роки тому

And I have a qapass blue screen pls help bro

@team09mysorewheeliemafia81 4 роки тому

Bro which circuit designer app y used in these video

@ExplosiondeTonterias 6 років тому

Hi, I have a little question... What connections are made to the lcd? About to the pins... Thanks!

@ravikumarsonjal6272 6 років тому

Bro what did you use in lcd display to connect Arduino uno board

@zyan5544 5 років тому

can we use both the keypad and Bluetooth for opening and closing

@arunprince4378 6 років тому

can you suggest one good idea for my b tech project?

@lunareclipse1882 4 роки тому

do you think its possible to make a keypad system with a usb drive overwrite (like a master key)

@thomasalexander1563 7 років тому

With simple things, Come creative idea,, Soon will be more subscriber.. More arduino again..

@ELECTRONOOBS 7 років тому

Thomas Alexander thank you. this is a great comment that motivates me. I hope.thst it will be like that. keep up

@mitulbhale7519 7 років тому

very nice project.

@naufalg 4 роки тому

what the detail of how you connect the push pin button with the resistor+ground, signal, and 5v. Im still struggling there, appreciate for the help

@amitbane7457 7 років тому

thanks for this such a simple tutorial 🙂

@ELECTRONOOBS 7 років тому

amit bane you welcome. I hope you enjoyed it :)

@anokhautomation4453 3 роки тому

👍nice tutorial

@user-lp1oz6sl3g 8 місяців тому

We can use one on off switch

@youngboy4717 4 роки тому

Thanks a lot

@israelramoscuentas 6 років тому

una pregunta con que version de arduino lo hisiste

@fakhritajuddin1731 7 років тому

what did you use to create the schematics ??

@MoradulIslam 7 років тому

Thanks bro

@ELECTRONOOBS 7 років тому

U wellcome :)

@BadGenio 7 років тому

keep going

@inlandb.villos1872 4 роки тому

can i use a 4x2 keypad? instead of that you used

@Livefreeman 5 років тому

good job

@brentroberson7211 6 років тому

Hello, I have a question but first of all this was a great video. So how do you suggest I power the arduino for permanent use? Would I have to just hide the wires up to the arduino from a nearby outlet?

@brentroberson7211 6 років тому

Oh, and I forgot to ask, did you just drill through the door to connect the keypad to the arduino?

@ELECTRONOOBS 6 років тому

Yes, just add a 12V transformer and nice hide the wires as a normal electronic door keypad.

@ID-te4sv 7 років тому

Hi I absolutely love all your videos your an absolute legend. I'm looking at trying this project where did you purchase the buzzer, on of buttons and leds please? Please continue to create these amazing videos, they are so easy to follow and especially with the links also. Where did you learn to do all these projects you have so much knowledge? 👍🏼

@ELECTRONOOBS 7 років тому

Thank you very much. I've got that buzzer and the buttons from an old DJ CD player. I always try to use scrap components. Keep up!

@ID-te4sv 7 років тому

Thanks very much for your reply. This is my first project I have no knowledge of electronics. I've purchased all the items you've mentioned in your video including the the Arduino Uno & Nano. Do you have a photo or any diagrams of how you connect all the leads to a Nano. I'm sorry if I sound stupid but I'm confused on how I run a red lead to the 5v power from the Bluetooth module, LCD screen and the servo motor there only seems to be one 5v port on the uno? Any photos of both uno and Nano would be much appreciated. Since my message I've uploaded all the zips and info, I thought I would just test it with LCD screen and keypad attached and nothing else for the moment. The LCD seems to flash through door open electronoobs, password, insider open and just keeps repeating.

@ELECTRONOOBS 7 років тому

I K those are all the same 5v lead. solder all the wires together and connect them to the 5V pin of the Arduino. it should supply enough power for all the modules

@ID-te4sv 7 років тому

ELECTRONOOBS thanks very much. I just wanted to test the keypad and LCD screen, so I connected just these two items to the Adriano Uno. I've installed all the code. The LCD lights up but it flashes up door open, password, then inside open and then repeats. What is the issue I know I've not got everything connected in regards to the other items, but presumed I would be able to test these two. Do you have an email address I could possibly send you a video of what's happening? I really want to learn more about electronics and your videos and projects are so helpful. Thanks

@ELECTRONOOBS 7 років тому

I K that's because you don't have the push buttons connected and it jumps around with no sense, now that i think you should add the buttons or delete sole lines on the code. find the part in the code where it says emergency open and delete that lines of code

@madalinaa29 6 років тому

Can i use just a 16x2 LCD?

@mousanadermahdi5656 7 років тому

ELECTRONOOBS hi..i want use more thane one secure code ...mean i want to make the password change for closed &open....help me plz

@hanypharmacy9203 7 років тому

can i know what buzzer u used or link me it please?

@malikabdullah2343 6 років тому

hey i want some help in this porject, can you help me out? i want to on/off a relay instead of servo. also i use many programmes from the internet , all goes right but when i switch off the arduino & then switch on it,,, stored password will be gone , i m using 1- arduino uno 2- 16*2 LCD 3- 6v Dc relay 4- 4*4 numeric keypad 5- buzzer & led

@wardvervoort997 Рік тому

Could i get the stl file of the casing for the keypad/lcd ?

@TheMusclyAdvisor 6 років тому

Will it continue if power supply is again on

@amirulislam5091 5 років тому

How to find my uploaded coad this project.

@krishnatomar16 5 років тому

Can you tell me how to change LCD pin mode

@madalinamada4962 5 років тому

Hi, how you make the app? Can you give a tutorial?

@animacecz 7 років тому

hey, cool video, im thiknig about making somethimg similar. But i have a question on you. How do you close the door? You just press button, or you control it with that button taht on the other side of the door?

@ELECTRONOOBS 7 років тому

Tomáš both things. you could close it with the push button or pressing the Button key on the keypad

@animacecz 7 років тому

Great, thanks ;)

@ROHITPATEL-jh4sk 6 років тому

Nice video

@neelranade6322 2 роки тому

Please make a video on turn on and off multiple number of relay with keypad

@teamotreme3920 6 років тому

I noticed the LCD that you used was the yellow variant, would it still work with the blue version or no?

@ELECTRONOOBS 6 років тому

Yes, both are good but sometimes the slave adress is not 0x3f. So change it to 0x27 if it dosn't work when using this function: LiquidCrystal_I2C lcd(0x3f,20,4);

@jaqenhghar6316 7 років тому

Hey, I want the door to be locked automatically after 10 seconds of opening, answers will be appreciated. Great video btw!

@vedatorpeta 5 років тому

You must add part of code after this: if(Str[10]='A' && character==5 && Str[6]=='3' && Str[7]=='0' && Str[8]=='0' && Str[9]=='7' ) { myservo.write(mot_max); lcd.clear(); lcd.setCursor(4,0); lcd.print("ACCEPTED"); activated = 2; analogWrite(buzzer,240); delay(250); analogWrite(buzzer,200); delay(250); analogWrite(buzzer,180); delay(250); analogWrite(buzzer,250); delay(250); analogWrite(buzzer,LOW); delay(1000); lcd.clear(); lcd.setCursor(4,0); lcd.print("WELLCOME"); delay(500); lcd.setCursor(2,1); lcd.print("ELECTRONOOBS"); delay(1000); lcd.clear(); lcd.setCursor(3,0); lcd.print("DOOR OPEN"); lcd.setCursor(2,1); lcd.print("ELECTRONOOBS"); you need to set the right delay after this and write: delay(what you need); myservo.write(mot_min); I think it will work.

@zebgames 3 роки тому

@@vedatorpeta Yes thank you it works

@pyza4225 5 років тому

is it work with Leonardo?

@abeljerson9360 6 років тому

The display on the lcd screen is blinking and the the digit is not entered I have carefully followed all your steps please help

@sugarmonkey 7 років тому

isnt it too much if I ask you to make a ganker style robot..??:) your such a nice person ready to reply in each comment ha:) keep it up..

@ELECTRONOOBS 7 років тому

My agenda is full of projects. I already have a robot on my to do list but I have no time yet. Thank you and keep up.

@davecristian6550 5 років тому

Is it ok to use 3x4 keypad?

@conartenova5314 4 роки тому

What app you used to draw 3:10 ?

@tarunanandrao 6 років тому

pls tell where did u make the intro pls i am a big fan of u look i even subscribed u and i even liked u pls tell me

@hatredfaction2351 4 роки тому

how can i replace the servo with nema 17 stepper motor

@skillradius9867 5 років тому

Can i use a 12 v servo motor

@agustinusyudhistira4374 7 років тому

Can I Use LCD without i2c backpack?

@whitely9986 4 роки тому

Great write up. Tried this but my servo keeps "twiching" and the LCD display reads "inside open" & "inside open electronoobs" I dont think I have a wiring issue, is there a loop issue in the code? please send help

@nikv2501 3 роки тому

Same with me

@alliedrepairingshop6558 5 років тому

amazing

@Vinylfliqs Рік тому

How comes in description it is Arduino nano bt in video it's Arduino uno?

@diyanakamarul1899 6 років тому

i was about to do the same project of yours " bluetooth door lock" but i need to replace the servomotor into a relay tht will control a certain load. is that possible ? how can i change the code part of servo into a relay code?

@ELECTRONOOBS 6 років тому

Yes, Instead of using servo.write to control the motor just use digitralWrite HIGH and LOW to turn on and off the relay! All the rest is the same

@diyanakamarul1899 6 років тому

Electronoobs thank youu for clarification!

@russkiyraketa2621 7 років тому

Hey, The library for the i2c does not work for me since i have an adafuit i2c LDC backpack. Only the adafruit LCD library does. How do I make this Work? Thanks great video

@ELECTRONOOBS 7 років тому

Well I haven't tried that but I supose that you inport the adafruit library instead of the i2c lyquid library. Then, I never used the adafruit library but i supose that it also has a LCD.begin or LCD.start or so. So use those to initialize the LCD and then substitute all the LCD.print functions with the ones for adafruit. Since is i2c, the LCD pins should be the same, A4 and A5 because those are the only i2c port for the atmega328p.

@dfaludi 4 роки тому

Does the color of wire matter?

@barirohsiti5452 6 років тому

how to open door from inside room? do I have to enter the password again? please response, thank you

@davidb9896 4 роки тому

Hi Electronoobs, I'm having a problem where after I include the libraries and upload the code, the screen on the LCD doesn't show anything and the servo is constantly moving back and forth, and the buzzer is going off non stop. Even the two push buttons don't do anything. Can you help me?

@yogitech8959 4 роки тому

Can I connect keypad and Bluetooth in single Arduino? And what is that program code?

@samnguyenquoc1004 6 років тому

i want uno R3 - mega 2560 ???compiling not yes .. plsss help me

@GundamNTD 7 років тому

hi I'm having a little trouble I uploaded the code to the arduino successfully and it worked fine but a couple of days later it stopped working so I bough a new arduino and uploaded the code again but nothing seems to be working all the cables are in the correct position do u have any idea what I did wrong?

@ELECTRONOOBS 7 років тому

You could upload the code? If yes, the LCD screen works? If yes, the keypad is the only one that doesn't work? I have to know all this in order to help you. Also if you have the Bluetooth module connected to the Tx and Rx pins you can't upload the code because the arduino uses those same pins to burn the code with the FTDI chip. So disconnect the pins before upload and connect them back later once the code is uploaded. Keep up!

@UserUSER-rx8hu 6 років тому

Shouldn't the numbers being pressed be hidden by asterix instead of being displayed?

@ChiRAGProducTions 7 років тому

Good vedio

@teamotreme3920 6 років тому

I'm using an Arduino Nano, and when i uploaded the sketch, i input the code and hit A, but nothing happened, the servo didn't move.

@Arizkika 5 років тому

why my lcd.init(); and lcd.backlight(); have a problem whitin this context?

@PowerMat81 5 років тому

The project with arduino uno is fully functional, but, with an arduino Micro( or Nano) i must change the pins and the code because the pin out is much different. I have a problem with SDA and SCL, what can i do, you can uplod a new schematic with the correct connections for Nano or Micro? Thanks a lot and sorry for my orrible english!! UPDATE : I do this changes using arduino Micro. For display I2C (LiquidCrystal_I2C lcd(0x27,16,2)use SDA and SCL, respectively: 2 (PD1)and 3(PD0), for the buzzer PIN 13 (PC7 - PWM), for external PIN 12 (PD6 - A11), for internal PIN 14 (A1), for the servo PIN 11 (PB7), for my home made 4x3 keyboard i use pins from 4 to 10 (4, 5, 6 for COLS and 7, 8, 9, 10 for the ROWS). If you connect the bluetooth use pins 1 (PD2) for TX and 0 (PD3) for RX. The code must be modified respecting the correct pin out. But, even without my changes, this project is awesome!!.... Thanks bro !!

@user-gv5nx7rp1j 5 років тому

Can you add a program to change your password when you press "C"?

@SachinMahesh3 7 років тому

Im looking forward to buying things and make one. but a tiny problem. my lock is not of the knob type its the Bolt action sniper type ( i hope you got it xD ) and its a little lengthy. i could lubricate i but will the servo be able to pull it down? cuz i want it on downward direction. if i could spin keys with it that will be great to..

@ELECTRONOOBS 7 років тому

Sachin Mahesh in my case I removed my lock and bought a new slide one to make sure that it would work. It only costs 1 dolar.

@SachinMahesh3 7 років тому

thank you for your fast reply. I will definitely try this and let you know. I have subscribed and liked this video. if you got some times please subscribe back to me also means a lot to me :)

@ELECTRONOOBS 7 років тому

Thanks. I'll do that now!

@dannyyeoh2340 7 років тому

Hello Electronoobs. This is a fantastic tutorial video and easy to understand. I really like it. Talking and tutorial action together, not just talking a lot but no action tutorial like many tutorial in UKposts does. Electronoobs, can you please give the link to download the header file of the Wire.h, Liquid Crstal.h or any other header file for it to be use in the sketch program..thanks in advance.

@ELECTRONOOBS 7 років тому

Hi there, First tahnk you for your com! The liquid crystal library is in the description, you can download it from there. And the wire.h comes with any Arduino IDE. I you cant install them just tell me again and I lee how I could help. Keep up!

@pangchunling321 6 років тому

Em. Just one more question, how many volts does this project need. Because I want plug in an adapter.

@ELECTRONOOBS 6 років тому

Apply a voltage from 6 to 15V to the Vin pin of the arduino. The arduino board already has a 5V and 3,3 voltage regulator.

@litpath3633 7 років тому

Does this help with escaped raptors or no?

@aniketgupta1340 7 років тому

#ELECTRONOOBS can u pls make a video regarding how to show readings of mq135 gas sensor in android app by MIT app inventor 2

@ELECTRONOOBS 7 років тому

Hi there. Thanks for your com. This kind of project is on my to do list but right now I am working on 3 more tutorials and taht's a lot of work so I can't tell you when I will be able to make that video. Thank you!

@TutocarloCV 7 років тому

nice

@dannyblack9705 4 роки тому

what if i use hc-06 module?

@teenagewoodworker7887 7 років тому

Cool

@alancarlperena2213 7 років тому

Hey Electronoobs? how if i not using the 2 buttons and the buzzer? how can i change the program?

@ELECTRONOOBS 7 років тому

alan alancarlperena@gmial.com just remove the emergency open part of the code and done

@huynhhieu1972 6 років тому

why not auto return after the door open ?

@amarnathsahoo7922 7 років тому

which adriuno board u are using in this project??

@ELECTRONOOBS 7 років тому

Amarnath Sahoo the project is made with a NANO board

@amarnathsahoo7922 7 років тому

thankyou sir

@ashu12nov 7 років тому

Can we add cam and storage with this in case of unauthorised access.

@ELECTRONOOBS 7 років тому

you mean like a camera to take photpo or what?

@ashu12nov 7 років тому

yes if some try to enter with wrong password and camera will take pictures and store in any storage device like pen drive or data card. so owner will get to know that unauthorised person.

@ELECTRONOOBS 7 років тому

Ashwani sharma that should be a very interesting project to do but also quite complicated.

@ashu12nov 7 років тому

as I saw ur all videos and others also and believe me some one can make it happen on easy way that is u. that's why I called up to genius 😋😉

@ashu12nov 7 років тому

u can use like OV7670 CMOS Camera am just suggesting rest u knw well

@stephenvasilunas7842 3 роки тому

hey how do i connect LCD to Arduino without taking up any digital pins.

@lewismurimi2518 5 років тому

Hello Electronoobs. i wanna make an arduino gprs tracker using some relays to cut out the power to my motor bike under the communication using my android smartphone. could u help out with the code please. al be grateful

@droneacerx1141 7 років тому

make a video of you showing the whole programming because that little bit is not enough please

@muhaiminulhaquepiyas7428 6 років тому

while RX pin is connected code does not upload. while press the keypad it does not work.press 3 then press 0 it replaces one another. while use android it is auto closed ...plz help bro