Home Automation System using multiple NodeMCU ESP8266 network with Blynk | IoT Projects 2021

In this IoT project, I have shown how to make the Home Automation System using multiple NodeMCU ESP8266 network with Blynk. with this smart home project, you can control multiple NodeMCUs from a single Blynk account. So you can use multiple ESP8266 for different rooms, and control them with Blynk App.

Discount Coupon Code:- JLCPCBcom

Download PCB Gerber file for this NodeMCU IoT based home automation project

During the tutorial video, I have covered the following topics:
00:17 How to control multiple NodeMCUs for different rooms with Blynk & Switches.
02:33 Required Components for this NodeMCU project.
02:47 Circuit diagram of multiple ESP8266 IoT-based Smart Home project.
04:22 How to configure the Blynk App.
05:55 Programming the ESP8266 NodeMCU with Arduino IDE
08:09 Connect home appliances with the smart relay module.
08:02 Controlling multiple NodeMCU control relays from Blynk.

Required Components for each room for this NodeMCU home automation
1. NodeMCU
2. 4-channel 5V SPDT Relay Module
3. Push Buttons

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Required Components for the NodeMCU control Relay Module PCB:
1. Relays 5v (SPDT) (4 no)
2. BC547 Transistors (4 no)
3. PC817 Optocuplors (4 no)
4. 510-ohm 0.25-watt Resistor (4 no) (R1 -- R4)
5. 1k 0.25-watt Resistors (5 no) (R5 -- R9)
6. LED 5-mm (5 no)
7. 1N4007 Diodes (4 no) (D1 -- D4)
8. Push Buttons (4 no)
9. Terminal Connectors
10. 5V DC supply

Download Code for this NodeMCU smart house automation project from the following article.

** (Important) Please don't connect both NodeMCUs with the laptop at the same time. And also use different 5V power supply for each NodeMCU. Otherwise, the relays turn on and off may take place.

** In code, you have to change only the virtual pins according to the NodeMCU numbers.
** You can use different WiFi networks for each NodeMCU, but the Authentication Token should be the same for all the NodeMCUs.

Our Previous ESP8266 NodeMCU Blynk project.

During the internet of things tutorial video, I have explained all the steps to make this ESP8266 home automation system with Blynk to control all the home appliances with and without internet. If the NodeMCU connected with WiFi then you can control the relays from anywhere in the world. And you can also monitor the real-time feedback in the Blynk IoT applications. So with this smart house project, you can convert any appliance to IoT devices and control them through the internet.

#internetofthings #esp8266 #Blynk
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Other useful IoT projects:

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[TechStudyCell]

** (Important) Please don't connect both NodeMCUs with the laptop at the same time. And also use different 5V power supply for each NodeMCU. Otherwise, false turn on and off may take place. Thank you.

[JonatanCastro-secondary]

I LOVE your videos man, great work. I was wondering if you ever thought about creating a small guide for people just starting out. For example one of the things I'm finding challenging is how to know when to use resistors or capacitors in a project, and how to calculate its values. Thanks once again!

[bbdas]

Thank you very much for the excellent videos.
Can you please tell me can it work world wide?

[HaniSharif]

Great video man! A quick question: Do you need an internet connection or using hotspot/wifi is just enough?

[smskundu]

MANUAL SWITCHES IS NOT WORKING PROPERLY, RELAYS ARE SWITCHING ON & OFF CONTINUOUSLY FOR SWITCH 2, 3 & 4, SWITCH 1 COULD NOT OPERATE RELAY 1. ALSO RELAYS ARE GETTING STUCK SOMETIMES AFTER SWITCHING OFF. WIFI LED IS ALSO NOT GLOWING THOUGH CONNECTED TO WIFI AND OPERATIVE THROUGH BLYNK APPLICATION (BOTH WEB AND ANDROID APPLICATION). PLEASE HELP TO RESOLVE THE ISSUE. I AM USING Node MCU ESP8266 V3 (LOLIN CH340 chip).

[LucidFX.]

GREAT video - thank you. How can i have 6 ESP32 and only control 1 Servo on each - press one button turn ALL servos to position 1, press another button return all servos to position 0 - may all be different degrees

[saiots]

Bro you are great.... you are doing really well bro keep it up
❣️❣️

[AneeshJonwal]

Doesn't work now. I spent one month trying. Blynk code keeps getting updated and code provided in this video doesn't work anymore.

[BlessyJoy-erew]

How to make energy management system for home automation using wireless sensors and actuators

[hk]

Kindly make the same video by using esp32 and rainmaker app

[ΠΕΤΡΟΣΠΑΠ-ζω]

All good, but when you turn off nodemcu and turn it on again with wifi but no internet, the physical buttons do not work

[orangerucksack]

Great Project, as a complete noob and getting on in years, if I wanted to add 1 button to turn on/off the 4 lights at the same time, could you assist on how to ????

[anandhurajeev]

Sir, pls uploade a vedio of home automation, it consists 16 Chanel relay, each realay control manually + IR+ BLINK

[pierricdoublet]

Super, thanks for sharing. Do you have the same possibility on blynk 2.0?

[kishanmukhia]

Great concept for best home automation.with internet or without internet.

[kerolosadel]

great job, i have 2 questions could i control them (2 esp8266)with google assistant or alexa or not?? and could i use 8-channel relay module with 8 switch for each esp8266?

[frankmarshall]

great video. can you supply the schematic for the pcb assembly?

[joshitoshi]

one question tho..how many smartphones can be used to control appliances? i mean for example can we use 10 smartphones to control the relays?

[arkamondal]

I made a same to same project.but pins are different.d1, d2, d5, d6 . I use seperate power supply for node mcu and 4 relay's. After starting the project, only relay 2 connected with d2 toggles. Rest are controlled by blynk or manual switch normally. If i change the output d2 pin to another relay, same problem occurs. I dont understand what's the problem is! Please help.
Thanks in advance.

[saiots]

Bro pleas make a video on this automation with multiple node mcu in which we can use traditional switches like in our room switch boards to on/off the load instead of using push buttons
Thanks bro in advance