Introduction
ESP8266 ESP‑01 is a compact WiFi module used in many IoT projects. Even though it has limited GPIO pins, it is powerful enough to build smart devices.
This tutorial explains a simple ESP-01 project to control a relay or LED.
Components Required
- ESP8266 ESP‑01
- ESP-01 adapter
- Relay module
- Power supply (3.3V)
GPIO Pins
Important ESP-01 pins:
- GPIO0
- GPIO2
- TX
- RX
- VCC
- GND
GPIO0 or GPIO2 can be used to control a relay or LED.
Project Ideas
ESP-01 can be used to build:
- Smart Plug
- WiFi Relay Switch
- IoT Sensor Node
- Home Automation Device
Conclusion
ESP-01 is small but powerful and perfect for compact IoT devices and DIY smart electronics projects.