ESP32 WiFi Bluetooth Smart Home Automation with Manual Switch & Blynk App | IoT projects 2021

In this IoT project, I have shown how to make an ESP32 WiFi Bluetooth smart home automation with manual switch & Blynk App to control an 8-channel relay module with and without internet. With this smart home system, you can control 8 home appliances from your smartphone using both Blynk App and Bluetooth. You can also control the appliances with manual switches or push buttons.
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Download PCB Gerber file for this ESP32 IoT based home automation project
drive.google.c...
For the New Blynk IoT platform, please refer to the following tutorial
• Home Automation using ...
Download Bluetooth App for the ESP32 Bluetooth project
drive.google.c...
**First you have to pair the ESP32 with Mobile Bluetooth, then connect ESP32 with this App. Please watch the complete video.
During the tutorial video, I have covered all the following topics:
00:12 How to control relays using ESP32 with WiFi, Bluetooth, and switches.
02:11 Circuit diagram of this ESP32 Home Automation project.
03:11 Configure Blynk App for ESP32 Project
04:32 Programming the ESP32 with Arduino IDE
05:47 Connect home appliances with the 8-channel relay module.
05:56 Install and connect the Bluetooth App with ESP32
06:30 Controlling 8 appliances with Blynk & Bluetooth using the ESP32 control relays.
Required Components for this ESP32 home automation system
1. ESP32 DEV KIT V1
2. 8-channel 5V SPDT Relay Module
3. Switches or Push Buttons
Amazon India Affiliate links:
ESP32 DEV KIT V1 : amzn.to/2N7LcBz
8-channel 5V Relay Module : amzn.to/3mTWyVZ
Amazon United States Affiliate links:
ESP32 DEV KIT V1 : amzn.to/3mBjCch
8-channel 5V Relay Module : amzn.to/3p50UeH
**Important, If you face the following ERROR then please use ESP32 board 1.0.3 version (old version)
ERROR: Sketch uses 1333170 bytes (101%) of program storage space.
**You don't need to install the BluetoothSerial library separately. It comes with the ESP32 board.
Download Code for the ESP32 WiFi + Bluetooth + (Manual Switch) Smart Home system from the following articles.
iotcircuithub....
In the article, I have shared both codes for Manual Switches and push-buttons.
Previous Video Link:
• ESP32 Bluetooth Home A...
During the internet of things tutorial video, all the steps to make this ESP32 smart home automation system control 8 home appliances with and without the internet.
ESP32 microcontroller also has Bluetooth in it, so, I have made a Bluetooth App in MIT App Inventor for this ESP32 smart house project. If there is no internet available, you can easily connect the Bluetooth App with ESP32 through Bluetooth and control relays from mobile.
#internetofthings #esp32 #Blynk
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[@TechStudyCell]

**Important If you face the following ERROR, then please use the ESP32 board 1.0.3 version (old version). ERROR: Sketch uses 1333170 bytes (101%) of program storage space. And you don't need to install BluetoothSerial library separately.

[@diaryiklanlucudiarylancu8367]

Ok sucses project thanks sir

[@diaryiklanlucudiarylancu8367]

How about 16 channels Sir? Could it be with the same program?

[@lifeatseaonship]

hi bro can u help me for ip address not coming

[@subarutan3862]

Yes sir im having a problem installing BluetoothSerial and now im trying to install ESP32 1.3 ver

[@basheershamsudeen7384]

A

[@djayan6011]

Can use with wifi+Bluetooth+remote?

[@soovui]

Superb bro, fantastic video. I hoping to see u could teach us from stretch on how to create our own bluetooth apps. Brilliant work and keep it up.

[@TechStudyCell]

Sure I will

[@fhussainmomin268]

Great sir.... make new project include in this project ..IR Remote and offline ip addresh with AAP

[@TechStudyCell]

Ok

[@manmeetsinghKJ]

hi subhajit, kya aap ek option add kr skte ho, ki jab hum bluetooth se oprate kre toh button ka color on hone pr green ho aur off krne pr red ho.. plz add some color for button in bluetooth app, yaa fir Button update ho on hone k baad ya disable ho off hone k baad.. baaki koi kami nhi h, iss superb project me.. i love you brada.... manmeet

[@TechStudyCell]

Will add feedback in upcoming videos.

[@subarutan3862]

Sir can you create it with blynk 2.0 thank you already sir, interesting

[@dreamboy931]

error compiling for board esp32 dev module......I get this problem what should I do now

[@itsparasmittal]

I want to control using more than 2 mobile phones so do I need to add Auth code for all ?

[@yawarsaeed6499]

Awesome, but dear can you add the option to the same code to update the io pins status with manual switches in Realtime still in bluetooth mode too as it has in wifi mode with BLYNK .

[@TechStudyCell]

Thanks. Will try to add that features in upcoming videos.

[@nightwing8164]

Impressive,great,super useful tutorial as usual.

[@TechStudyCell]

Thanks

[@AAdnaanmtl]

Excellent work sir as usual. Sir all your projects are amazing and admirable. I requested earlier also if you can please add dimmer also in these projects it will be more useful and practical including relay on off status and dimer value display on OLED or LCD. Thanks in advance.

[@TechStudyCell]

Thanks. Will make video on this

[@electronic7979]

Nice project

[@TechStudyCell]

Thanks

[@kuldeeptripathi649]

I need to use switch both ways as in if I turn on a device using switch I can turn it off from blutooth and Blynk. Also I need to make it work with NodeMCU and HC-05 Module can you please suggest some changes. Waiting for your Reply.

[@Radhebhai6222]

Hello sir video banaye wifi +Bluetooth +manual switch +Google assistant nodemcu esp32 video Banaye

[@TechStudyCell]

ok. It will take some more time.

[@AyanAdin]

Can you please help me to add some additional features like shedule time, timer looping on switch

[@thavaci6116]

Sir, pls say in this project you added eeprom in codeing...??

[@mansoorhussain1703]

Hi Sir I see yours Great Projects And I like it And try to make it Dear sir make a Vedio a project control rely board with esp8266 but without internet Coz we have no internet

[@delrstudio.2252]

Thank you

[@mobileandcomputertechnolog3043]

Wifi + Bluetooth+ ir simultaneously controlling possible? If possible plz make a video and update on KZbin

[@hadran1567]

Thank for the video , I wonder how to create the app if i want to create it if you help with that

[@rollyragudo8905]

EXCELLENT BRO

[@TechStudyCell]

Thanks

[@thotapallypraveenkumar9226]

What if suppose switch is in on position need to turn off light with wifi/Bluetooth, Must and should switch is in OFF position...? Otherwise it will not work...?

Is it possible to make the manual switch work as a three way with the blynk? I mean, if I hang up on one I can call the other regardless of position.

[@kuldeeptripathi649]

Hey did you found the circuit you were looking for

@@kuldeeptripathi649 I wrote a code to work like this using other library called JC button.

[@kuldeeptripathi649]

@ Hey thanks for replying can you elaborate a little that how did you made it work do you also change the connection and did you using simple switch or 2 way switch

[@kuldeeptripathi649]

@ Hey thanks for replying can you elaborate a little that how did you made it work do you also change the connection and did you using simple switch or 2 way switch

[@ericdurant8972]

Good job thanks

[@TechStudyCell]

You are welcome

[@saifgamingyt1]

In my case everything is working fine but when I connect the board to the another power source like adapter or vin except PC it stop working.

[@TechStudyCell]

Please use a stable DC power supply. It can also happens due to loose connections.

[@sainithin5485]

Bro please design a pcb for this to use directly on AC supply 220volts without 5v additional power supply

[@SantoshKumar-sc6mr]

Great project But I have a question Agar hamne relay 1 ya 2 ya koi bhi relays ko on kar rakha h via manual switch or electricity jane ke bad dobara ati h to kya vo relay activat hongi jo hamne manually ya blink app se on karke rakhi thi ?

[@HMJSarkar]

You could use Hi-Link power converter from 240v to 6v on your custom designed board instead of cellphone charger for power supply to ESP32 board. It would look like built-in power supply.

[@TechStudyCell]

I have used 5v mobile charger. But you can use hi-link power supply.

[@saikumar1265]

If you want ur proj more flexible sweet and short u can use hilink power adapter

[@aliadnans]

how can I use PCB Gerber files with Altium Designer?? please guide me.

[@loopfi8835]

can you share the schamatic and pcb file please?

[@XODXHD]

i try to work on this project but the problem is i can't create a blynk account , can u help me with that

[@anilkumarmaurya5388]

Great job and one more inspiring video, also try to add 5 step fan speed control + google assistant as it is available in everyones phone and without fan control home automation is something like incomplete...

[@TechStudyCell]

If you include fan regulator the circuit will become complex. So working for any alternative solution.

[@anilkumarmaurya5388]

Ok, let the complex part be aside but there should be at least fan speed controller type or something like that...

[@KLAKET03]

Hi sir, can you do a video for this project with new blyn2.0

[@rameshniroj2225]

Awesome Work, Please Do GOOGLE ASSISTANCE + BLINK APP TO 8 RELAY MODULE PLEASE SIR ❤️ 🙏🙏🙏

[@Kai-dg4go]

Great video. I would like to create a PCB Gerber file, but please let me know the mounting parts. Please give me all the numerical values ​​such as resistor values ​​and transistors.

[@botasergiuovidiu9569]

Really great job/project.I like what you do,and explain. The only issue wich i really found on this project,is that without wifi/bluetooth you can't control any more with the remaining manual switches...And as i see the code is permanently checking for wifi,wich is ok,but the loop must be adapted.I am wrong in what i say? Thanks for all this videos, Regards

[@ChandanKumar-kr2kj]

Any solution for?? Error variable or field 'button1handler' declared void

[@matthiash.454]

You have 220 volts AC____bulbs connected to the output of the relay I want to connect WS2812B___ 5 volts DC is this possible ?

[@mobileandcomputertechnolog3043]

This projects not working Bluetooth when connected wifi. Plz send me a code wifi and Bluetooth will be work together/ simultaneously..

[@ashishsingh-du2sf]

Next video please on how to create own application to control appliance with bluetooth using firebase

[@tushthushan5590]

Is it possible to make all these relays so that they can be pwm..? What should be changed in the code?

[@traveller_techieee]

I'm turning on and off the fan using relay 8, most of the times the esp32 gets hanged after turning on the relay and shows wifi is offline in the BLYNK app, when this happens i can't control using manual button as they are also connected to esp32. The only way to start back the system is by hard resetting esp32. What I'm doing wrong suggest?

[@cihanyeter7353]

hello, I'm doing the esp32 project. I ran into a small problem, I would appreciate it if you could help. Please

[@isteevanmangalore9171]

Ho bro I couldn’t found Bluetooth serial library there is no zip file and no download option plz help me

[@Angel_ways_1122]

code is not compile library bluetooth is note installes i have esp32 38 pin version

[@MuhammadImran-tn2gw]

Great person

[@anil1010it]

Can i switch on more than 1 relay with single button? Also is it possible to set delay of 20 seconds for one relay to start? also reverse process if turned off a button?

[@kunal.sonawane3349]

How can we connect only one switch to on off this light... any short-circuit problem.

[@melvinpaneda9226]

How about esp32 with blynk + sinric pro(google assistant) *4 devices only

[@unfoldgamers]

Next level 👍👍 your awesome

[@TechStudyCell]

Thanks

[@pawankumarsingh3996]

Superb, sir I need your help. Can I control this project with different 5 android phones at a time?

[@TechStudyCell]

For that login the same Blynk account from different phones,

[@Shil6480]

Bro ye dono app ek hi mobile phone may install karkaye chala saktaye hai

[@saneeshgeorge4320]

Which device you are using for record your video and audio...it is very nice

[@TechStudyCell]

My mobile phone

[@luansinani389]

I am looking for an project where I can control the relays from alexa, manual switchces, bluetooth, and blynk. looking forward

[@TechStudyCell]

Blynk is not required if you can control it with Alexa App. Will make video on this.

[@saikumar1265]

Yeah I done instead of Bluetooth I used Web server which can me be control even in WAN network with (node mcu)

[@luansinani389]

@@saikumar1265 is it quick and get a feedback ?

[@flbeats3538]

Bro bs ek problem solve kr do,ki jb light jati hai or jb light ati tab ye 0se start hota matlab jo button chalu the vo bhi band ho jate hai,agar ye memory store kr sakega toh koi problem nhi hogi,pls try to solve

[@salimminapara2527]

Sar 8 relay arduino Bluetooth +IR remote+ manual to complete program please

[@kitosilva8959]

I mean how many mobile can control at same time the system ? because in code we define auth code belongs to APP the one that is different from each mobile APP ?

[@TechStudyCell]

Just log in with same Blynk account credentials from different mobile

[@jufethiatreshatangpos752]

What website we can create and simulate the circuit when the other components is not available in tinkercad? Please hear me out for the sake of our project .

[@SandeepKumar-yb2tv]

sir wifi not connecting automatically after diconnection

[@MuhammadKhan-kq8vy]

Kindly make bluetooth+infrared+blynk

[@yogeshitaliya473]

Nice one

[@TechStudyCell]

Thanks

[@TechnicalMech]

When i download bluetooth serial library from below link there is no option to download the library..and when i search the library in arduino ide skech manage library.the bluetoothserial not shown

[@TechStudyCell]

If you have installed ESP32 board, then it is not required.

[@TechnicalMech]

@@TechStudyCell thnx for valuable rply

[@mariogorres2379]

Sir May I know what kind of software with use PCB design?

[@shiblisadik9586]

Sir fan speed control with this board pls

[@matthiash.454]

Super project 👍🏼 Question: could you also connect 5 volt DC LED Stripes WS2812B to the output from the relay ? 🤔

[@TechStudyCell]

yes

[@loopfi8835]

can you share the schamatic and pcb file please?

[@janakpatel137]

what change is required in this code for new blynk 2.0?

[@ttyoung3046]

Tech studycell, It is a great and clear video to viewer. May I ask your opinion if it is possible and worthwhile to use this ESP32 board to connect a joystick for home flight simulation software? Thank you very much for your sharing.

[@janakpatel137]

Sir i am making this project like blynk 2.0(wifi)+BT+manual with DOIT ESP32 DEVKIT V1 board but due to higher size of code i select board ESP DEV with Huge file option in partition for uploading the code, code is successfully uploaded working all perfect except board is not connected with wifi so i cant control via blynk so please give me any suggestion? i change the board?

[@santhoshkumarchintakayala2017]

what is cost of whole circit ..

[@Kai-dg4go]

Hello. I downloaded PCB_Gerber_ESP32_Relay_8channel_01 and created a board with JLCPCB. I assembled it, but it doesn't work even if I turn on the 5V power. Please tell me how to solve it.

[@TechStudyCell]

what is the issue?

[@MrMemetivation]

sir what is the budget of this project??

[@VTX1029]

Can you make the relays momentary instead of latching?

[@juhiscreativeworld6260]

Nice work... Can we manage to control applainces from only one application...since it is confusing to control two apps...

[@TechStudyCell]

idea noted

[@sharmavikashkumar22]

how add bluetooth serial library aadreno application. Zip file not available.

[@TechStudyCell]

You don't need to install BluetoothSerial library separately

[@sanctuaryjames3434]

Hello Techstudycell, this project is great. I have made exactly this project and it is perfectly working. Thanks. But I have a problem. When wifi router is disconnected or restarts, esp32 gets disconnected, that's fine. But when the wifi router is back to working, esp32 does not reconnect back to the router, except I press the reset button. Please, how can I make esp32 reconnect with wifi without rebooting the esp32 board?

[@subarutan3862]

hello did you succesfully installed the BluetoothSerial library because mine cannot be installed

[@subarutan3862]

Sir do your ESP32 automatically connects when the you turn on your wifi?

[@janakpatel137]

This code is valid with new blynk app? Because in old app new sign up is not possible

[@bellosergeboubabell3300]

Good morning Sir. Please I didn't not succeed to connect the Bluetooth app with the ESP32. Please is it another way to disconnect the Wi-Fi? I did all that I know but the Bluetooth app is not going through

[@AshishSingh-pm2nx]

Bro please next video on how to develop app for this project using MIT google fire base please please it will be very pleasure to learn from it.

[@AshishSingh-pm2nx]

Awaiting for your response big fan bro..Please teach to develop same app for esp32 using MIT..LOVE THE WAY YOU EXPLAIN

[@AnkitKumar-ux5ln]

Connect kaise hoga video chat detail mein daliye

[@PBTYwRR]

Wifi + Bluetooth+RF+manuval possible?

[@jagdishchauhan8683]

Sir isme ir remote aed kardijiye

[@subarutan3862]

Sir what if there is no wifi but have a hotspot from phone as a wifi to ESP32 is it possible or still work? Thank you sir for this videos ☺️🙂

[@okkaputra9361]

hello sir! please make this project use eeprom.

[@Shil6480]

Bro wifi say work ho rahi hi per Bluetooth say oprrate nhi ho rahi why

[@kitosilva8959]

Hi techiesms, I would like to know uaing bylink how many mobile can contrl our systems ?

[@TechStudyCell]

This is TechStudyCell. you can use any number of mobiles. just login to same Blynk account from all the mobiles.

[@user-is1st2ob5g]

Супер! Только в приложении блютуз не хватает индикации срабатывания кнопок.

[@mayankpatel6715]

It's awesome! Can we not know the RELAY status in bluetooth app??

[@saikumar1265]

That u can add with an indicator beside switches in bt application using MIT software

[@astroBoy24]

Total cost for you, to do this setup ?

[@venkateshpriya2018]

Whether Supply is Failre what Happen? Altrenat Solution

[@saran223081]

grt

[@vcooltm8769]

bluetooth can not connect his constraints where yes ...

[@TechStudyCell]

If the WiFi is not available, then Bluetooth will connect

[@prokpaly2868]

hello sir i upload code to esp32 board but i not connect app blynk help solve for me

[@TechStudyCell]

Check the wifi connection and Auth token. You have tap on the play button in blynk app.

[@lochanappanna4910]

can you give the specifications to put in while ordering the PCB?

[@TechStudyCell]

For JLCPCB, enter the quality and masking colour.

[@fhussainmomin268]

Sir... If possible Bluetooth and wifi operate sate time...? Not use same time both...

[@TechStudyCell]

If you can control it with WiFi, why you need Bluetooth at the same time

[@fhussainmomin268]

@@TechStudyCell Sir.. My phone is active with wifi... But some others phone is not internet.. So.. Both phone operat... Same time..

[@cristophervlogs9835]

Sir i need your help can i buy your how much

[@TechnicalMech]

Make a complete video about how to upload code, library,board etc in arduino ide

[@TechStudyCell]

ok

[@traveller_techieee]

Good project but I'm getting error while compiling code as Sketch uses 1333170 bytes (101%) of program storage space. Maximum is 1310720 bytes. Global variables use 52500 bytes (16%) of dynamic memory, leaving 275180 bytes for local variables. Maximum is 327680 bytes.

[@TechStudyCell]

You have to use ESP32 DEVKIT V1 board. Select the proper board (DOIT ESP32 DEVKIT V1) then upload the code.

[@naturesbeauty56]

Can you give app source code of bluetooth control app

[@ahsanhabibnafi2388]

Is there EEprom System work?