ESP32 ESP-NOW + Web Server | Control Relays with OLED Feedback

Описание: In this project, we combine ESP32 ESP-NOW communication with a built-in web server to control 4 relays wirelessly. The master ESP32 sends commands using ESP-NOW and also hosts a web interface to control the relays from any device connected to the local network. Meanwhile, the slave ESP32 controls the relays and sends back real-time feedback, which is displayed on an OLED screen connected to the master.

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Key Features:
ESP-NOW based wireless communication (no router required).
Web-based control panel hosted by the master ESP32.
Real-time relay status display on OLED and Web dashboard.
Feedback-based LED status indicator for slave connection.
Manual control using buttons on both master and slave.
Fully functional without internet access.

Why Use ESP-NOW?
ESP-NOW is a fast and connectionless wireless communication protocol from Espressif. It allows devices to send data without WiFi or the internet, making it perfect for IoT and automation systems that require local, reliable, and energy-efficient connectivity.

Download the ESP-NOW + Web server source codes from the following article:
https://iotcircuithub.com/esp32-web-s...

Download PCB Gerber file for this ESP32 home automation project
https://iotcircuithub.com/wp-content/...

During the ESP32 project video, I covered the following topics:
00:49 Quick demo on ESP32 ESP-NOW Web server relay control project.
03:53 Required components for the ESP-NOW project.
04:02 Circuit diagram of the ESP-NOW ESP32 project.
04:42 Source codes for ESP-NOW ESP32 relay project.
05:08 Get the ESP32 MAC address for both the Master & Slave.
06:19 Program the Master ESP32 in this ESP-NOW project.
08:08 Program the Slave ESP32 in this ESP-NOW project.
10:20 Steps to connect with the ESP32 Access Point (Web server).

Required Components for this ESPNOW ESP32 project
1. ESP32 DEV KIT V1 2qty
2. 4-channel 5V SPDT Relay Module
3. Push Buttons 8qty
4. SSD1306 OLED Display (I2C)

Amazon India Affiliate links:
ESP32 DEV KIT V1 : https://amzn.to/331pohb
4-channel 5V Relay Module : https://amzn.to/2BQ5Y3o

Required Components for the ESP32 control relay PCB V3:
1. Relays 5v (SPDT) (4 no)
2. BC547 Transistors (5 no)
3. PC817 Optocouplers (4 no)
4. 510-ohm 0.25-watt Resistor (5 no) (R1 -- R5)
5. 1k 0.25-watt Resistors (7 no) (R6 -- R12)
6. LED 5-mm (7 no)
7. 1N4007 Diodes (4 no) (D1 -- D4)
8. Hi-Link HLK-5M05 AC to DC converter.
9. Terminal Connectors
10. Push button (1no)

This project demonstrates how to build a robust, local control system using ESP32 boards without relying on Wi-Fi routers or internet. Perfect for smart home projects, automation systems, or learning advanced ESP-NOW use!

#espnow #esp32 #homeautomation

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WARNING:
This video is for demonstration and educational purposes only.
Each demonstration presents risks and hazards that must be fully understood before attempting.
And should be performed only by professionals
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