Uploaded August 2019 | Updated September 2026, 2 weeks ago

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Arduino | NodeMCU ESP8266 Control Relay & Light Via Local Web Server. In this project video I use Arduino IDE 1.8.9 , Notepad++ V7.7.1 , Relay Module and LoLin NodeMCU V3 ESP8266.

To add the Library and NodeMCU ESP8266 Board see here : youtube.com/watch?v=8jMr94B8iN0

Download source code here : drive.google.com/open?id=16AHbVHV90ll4BFE6-r8o4fEESiqh2p_G

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*High Voltage Warning
I warn you here that we use High Voltage which if used incorrectly or improperly can result in serious injury or death. So be careful what you do because I am not responsible for your actions.
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If an error occurs like this or something like this :

Exception (3):

epc1=0x4000bf64 epc2=0x00000000 epc3=0x4000473f excvaddr=0x4023d571 depc=0x00000000
ctx: cont
sp: 3ffffd00 end: 3fffffc0 offset: 01a0
for more complete error display and solution see here : drive.google.com/file/d/19zP6cfRFA2LPx9eFAcTnqa50ir6gM-Zo/view?usp=sharing

Thanks to Prince Okumo (@Prince Okumo) for correcting this error.
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For other video tutorials on this channel, please see this playlist:

- Basic4Android (B4A) Tutorials : youtube.com/watch?v=-BIq32-qEgA&list=PLnXsmScWzcm6RVlhPM7qg_OJ2N8OpV99d
- Electronics Tutorials : youtube.com/watch?v=rLdsWt6EP6w&list=PLnXsmScWzcm766h5Dn4AJjbJRzDfCPh4h
- Arduino Tutorials : youtube.com/watch?v=A3_EBZqCG5s&list=PLnXsmScWzcm48hvcTTRAUFcP5Fjd4u8cS
- Great Cow Basic Tutorials : youtube.com/watch?v=orHrLmEvp0o&list=PLnXsmScWzcm7xejzacm5cKJMIh_tXXxN8
- Bascom Avr Tutorials : youtube.com/watch?v=JYKSkNQq9eM&list=PLnXsmScWzcm6F9gX1wYenqjKdqVSM7d6B
- VB .NET Tutorials : youtube.com/watch?v=Sy2vjWO0ydM&list=PLnXsmScWzcm4g8AWEJ6WXVUOBh_cWF5_z

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Download Arduino IDE : arduino.cc/en/Main/Software
Download Fritzing : fritzing.org/download
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Images and Icons Sources in this video:
NodeMCU V3 ESP8266 : github.com/prasertsakd/esp8266_fritzing
DHT11 Image : github.com/HuangYuTse/DHT11-module-fritzing-part
Light : iconfinder.com/icons/1511312/bulb_idea_idea_bulb_light_bulb_icon
High Voltage Warning : pixabay.com/id/vectors/tinggi-tegangan-tanda-simbol-24145
Laptop/PC : iconfinder.com/icons/4417093/code_laptop_mouse_numbers_with_icon
CellPhone : iconfinder.com/icons/171508/call_phone_smart_icon
WiFi : iconfinder.com/icons/925808/wifi_icon
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