ESP 8266 Wifi Module

The ESP8266 NodeMCU development board puts Wi-Fi connectivity on a breadboard-friendly module with a full Arduino IDE-compatible environment. With 30 GPIO pins (11 usable), 4 MB flash, and a built-in TCP/IP stack, it's the most popular board for IoT projects, web servers, and wireless sensor nodes.

🔹 Key Applications

• Wi-Fi connected IoT sensor nodes
• Web server hosted on the device itself
• MQTT data publishing to cloud platforms
• OTA (over-the-air) firmware updates
• Wi-Fi remote control of relays and actuators
• Smart home device integration

🔹 Why Choose This Module?

• Built-in Wi-Fi — no separate module or shield needed
• Arduino IDE compatible — use familiar tools and libraries
• 4 MB flash — room for complex web servers and SPIFFS file storage
• USB programming — direct programming via Micro USB
• Active community — thousands of tutorials and libraries available

🔹 Technical Specifications

• Chipset: ESP8266
• Wi-Fi: 802.11 b/g/n (2.4 GHz)
• Flash: 4 MB
• GPIO: 11 usable digital I/O
• Analogue Input: 1 (0–3.3 V)
• Operating Voltage: 3.3 V
• Programming: Micro USB (CH340 USB-serial)

🔹 What's Included

1 × ESP8266 NodeMCU Wi-Fi Development Board

🔹 Pro Tip

💡 Install the ESP8266 board package in Arduino IDE via Boards Manager (search 'esp8266'). Use 'NodeMCU 1.0 (ESP-12E Module)' as the board target. The CH340 USB driver is required on Windows. For IoT projects, the ESP8266WiFi and PubSubClient (MQTT) libraries will cover 90% of use cases.

⚠️ Note: Always ensure proper heat dissipation and correct voltage configuration before powering connected devices.