Home Automation Using NodeMCU and Blynk 2.0 | Control Bulb Using Blynk 2.0 | Blynk 2.0 Projects

Control Electric Bulb Using Blynk 2.0/Blynk IOT
Required Components
==================
1. NodeMCU
2. Relay
3. Bulb
Components Link
===============
1. NodeMCU - robu.in/product/nodemcu-esp82...
2. Relay - robu.in/product/5v-2-channel-...
3. Connecting Wires - robu.in/product/30pcs-flexibl...
Software Required
===============
1. Arduino IDE - www.arduino.cc/en/main/software
2. Programming Language - C Language
Source Code
===========
github.com/Tech-Trends-Shamee...
Reference Video of Arduino Experiments
======================================
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Music: www.bensound.com
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♥ Instagram: / tech_trends_shameer

[@stevechristie4030]

BRILLIANT! Excellent project WITH EASY TO DOWNLOAD SKETCH! Thank you very much!

[@TechTrendsShameer]

You are welcome! Keep Supporting.

[@clobel55]

how could you say that? This guy is completely incomprehensible

[@pineappily3119]

Relay turn on but it does not work for any commands and it does not turn off. I even tried by setting digitalWrite to low but it does not work.

[@KrishnanS-mt8zw]

Good teaching, thank you.

[@TechTrendsShameer]

Thank you

[@varunraghuwanshi3177]

My relay led is on and off while triggered but the bulb continuously on and i m also not getting any switching sound why pls help

[@maitreythakar9970]

my NodeMcu's LED is blink and stop is my Node mcu is works or not ?

[@hellyosagenghaqiqie9685]

THANK YOU

[@TechTrendsShameer]

Welcome.

[@nathanielsyiemlieh2196]

very helpful thank you it's working for me

[@TechTrendsShameer]

You're welcome!

[@trtcsoftware4703]

0hh best leh bro biang2

[@sulaimanbaigmirza1679]

Sir my bulb is just switched on and not getting off, only the MCU led is getting off.

[@issacstanly.d2151]

Sir can i use analog bulb

[@nupurpandey8181]

I am a learner. Nodemcu is connected with wify and setup all parameters but through the blynk I cannot make it on or off.

[@TechTrendsShameer]

What error you are getting?

[@rodrigocontrerasa.254]

The relay doesn´t work properly with this code. When you conect the cable with the signal, it activates the relay but didn´t respond to the commands of the phone or Comp. It seems that the relay is always activate. Is the same problem that explain some of the other coleagues previusly.

[@subhodipchowdhury6492]

i face same problem , please can you explain the solution !!

[@anjaneeshreddy2197]

Blow is glowing but node mcu is working...what is the problem with the relay, iam not understanding...

[@TechTrendsShameer]

I didn't got your question. Can you please let me know the problem you are facing?

[@malcolm5688]

Sir please make one video tutorial on Temperature control fan

[@hannahanani6778]

Can i know why i cant put relay D4. its show error and the system askme to change to V4. Is it still the same? I follow all the insruction but i cant turn on the bulb(as for me i change to fan). My fan not move at all

[@TechTrendsShameer]

Please reply the below
1. Where you connected the pin in Nodemcu D2 or D4?
2. In Blynk -> Datastream which pin you selected?
3. In the program which pin is mentioned?

[@izzuddinaiman3433]

@@TechTrendsShameer 1. in NodeMCU I connected to D4
2. in blynk I selected pin 2
3. In the program, pin D4 is mentioned

[@VoidFiller1]

bro is your project working?

[@AkvilExperiment]

Same problem I'm facing

[@sulaimanbaigmirza1679]

This code is showing compilation error for ESP8266wifi.h, what to do?

[@TechTrendsShameer]

Install the Blynk library from Arduino IDE -> Tools -> Manage Libraries

[@sulaimanbaigmirza1679]

Thank you sir, the problem is solved but the bulb is not working instead the LED on the MCU is working, please help me out.

[@praneetha7483]

Sir its showing as uploaded but its not showing online

[@TechTrendsShameer]

Check the WiFi Connection, Auth code and the circuit connection.

[@nishatvasker7397]

The source code link is not working,,can you kindly please provide the source code!

[@TechTrendsShameer]

Please check this link drive.google.com/file/d/12QAQ_tQcEUAJ3tWhwNkZHHfKNx2jxeDk/view?usp=sharing

[@KokilaShri-mb6cw]

What library are you using sir

[@TechTrendsShameer]

Blynk library.

[@hannahanani6778]

Is it still the same if system donr recognize D4. and only know V4

[@TechTrendsShameer]

Please reply the below
1. Where you connected the pin in Nodemcu D2 or D4?
2. In Blynk -> Datastream which pin you selected?
3. In the program which pin is mentioned?

[@hannahanani6778]

@@TechTrendsShameer
1. At D4 at nodemcu
2. Pin 2 same as you
3. I copy your code which is D4 is mentioned at code
Should we put socket too? Because i just use fan pc connect to relay

[@TechTrendsShameer]

Connections are correct. Give power supply for the fan through a battery.

[@nupurpandey8181]

I am using 4 relay. What will be the source code?

[@TechTrendsShameer]

#define BLYNK_TEMPLATE_ID "TEMPLATEID"
#define BLYNK_DEVICE_NAME "Control Electric Bulb"
#define BLYNK_AUTH_TOKEN "AUTHTOKEN"
#define BLYNK_PRINT Serial
#include
#include
char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "WIFI Username"; // type your wifi name
char pass[] = "WIFI Password"; // type your wifi password
int pin1 = D1;
int pin2 = D2;
int pin3 = D4;
int pin4 = D5;
void setup()
{
Serial.begin(115200);
Blynk.begin(auth, ssid, pass);
pinMode(pin1,OUTPUT);
pinMode(pin2,OUTPUT);
pinMode(pin3,OUTPUT);
pinMode(pin4,OUTPUT);
}
void loop()
{
Blynk.run();
}

[@meghankingdom3568]

Sir which ssid and password we entered in programme?

[@TechTrendsShameer]

Enter the ssid and password of the connection which you are using.

[@prathapa3100]

Sir I can't able to connect Google assistant sir.i should done all the things that you have don't i can't able to connect Google assistant.

[@prathapa3100]

Is there is any code to insert into esp8266

[@TechTrendsShameer]

please connect me in instagram.

[@namitadandapat9635]

My project is not seeing device online

[@TechTrendsShameer]

Please message me on Instagram
instagram.com/tech_trends_shameer

[@arfatgoundi6453]

Sir what is the source code for 2 channel relay

[@TechTrendsShameer]

You can use the same code, there is no change in code. In blynk, you need to add 2 variables. That is the only change.

[@AkvilExperiment]

Sir I have completed the project but in the program it shows V4
And another problem is it is not connecting to internet and shows offline

[@TechTrendsShameer]

Its D4. Not V4.

[@AkvilExperiment]

@@TechTrendsShameer it is not connecting to internet?

[@TechTrendsShameer]

Check the video again and follow all the steps in the video.
Check the circuit connection
Check the Auth code from Blynk is correct.

[@Electroxadict]

For esp32

[@TechTrendsShameer]

Just need to change the pin and the corresponding lines in the code

[@kamals9122]

@@TechTrendsShameer send the code for esp32 sir

[@3BoxCreation]

Code link not working

[@TechTrendsShameer]

message me in instagram.

[@shubhamsaptasagare7957]

Very Good Project
I also trying to make this but my relay not running properly both red and green signals are giving !
So how can solve this problem??
Guide me sir

[@TechTrendsShameer]

Thank you. Did you have external power supply to the relay ?

[@TechTrendsShameer]

Pls send me the photo of connection

[@g.nishanthjnvskzr9986]

please send whole code

[@TechTrendsShameer]

github.com/Tech-Trends-Shameer/Esp-8266-Projects/tree/main/Home-Automation-Using-Blynk-iot

[@likhithkumarn2390]

Source code deleted pls add

[@TechTrendsShameer]

please message me in instagam.

[@subhasishdutta5628]

Source Code Not Working

[@TechTrendsShameer]

What is the problem you are facing?
Please send me the code

[@saiots8651]

complete source code diya hi nhi iss bhai ne

[@Sunny_mlm]

device is offline problem

[@TechTrendsShameer]

Check WiFi connection and also make sure you copied the auth token from blynk

[@vinaykumarhs5509]

Please share to code

[@TechTrendsShameer]

Please check video description

[@Electroxadict]

No source code

[@TechTrendsShameer]

Please contact me in instagram.

[@adigoppulamadhu4332]

Sir can you provide the circuit diagram

[@TechTrendsShameer]

Please watch the full video. Circuit is included in the video