# ESP-NOW 4-Channel Relay

Day 56 of the 100 Days 100 IoT Projects collection. Board: ESP8266.

Drive four relay channels wirelessly from a single ESP8266 controller over ESP-NOW. Multi-zone switching without wires.

## How it works

One ESP8266 acts as the controller, sending channel commands over ESP-NOW to a second board wired to four relays. Each relay switches independently, giving you multi-zone control — lights, fans, pumps — with zero wires between the switch panel and the loads.

## What you'll learn

- Multi-channel wireless control
- Relay arrays
- Wire-free home automation
- Command addressing

Full project (code, wiring diagram, Wokwi simulation): https://github.com/kritishmohapatra/100_Days_100_IoT_Projects/tree/main/ESP_NOW_HOME_AUTOMATION

Summary by SkillShop. Code and diagrams belong to the original repo.