
NodeMCU ESP8266 CP2102 – WiFi Development Board (ESP-12E)
The NodeMCU ESP8266 is the original low-cost WiFi microcontroller board that sparked the IoT maker revolution. Based on the ESP-12E module and featuring a CP2102 USB-to-UART bridge, it offers seamless plug-and-play programming from any computer and a rich set of GPIO pins for sensor and actuator interfacing.
Key Specifications
- Module: ESP-12E (ESP8266EX)
- CPU: Tensilica L106 32-bit RISC @ 80/160 MHz
- RAM: 80 KB user data RAM
- Flash: 4 MB SPI Flash
- WiFi: 802.11 b/g/n (2.4 GHz), station + AP + STA+AP modes
- GPIO: 11 digital I/O pins, 1 ADC (10-bit, 0–1V)
- USB-UART: CP2102
- Operating Voltage: 3.3V logic, 5V USB input
- Programming: Arduino IDE, MicroPython, NodeMCU Lua firmware
Compatibility & Use Cases
Fully compatible with the Arduino IDE via the ESP8266 board package, and supports MicroPython and Lua scripting. Works with all standard I2C and SPI modules. Common applications include:
- WiFi-connected IoT sensor nodes and data loggers
- Home automation with MQTT, Blynk, or Home Assistant
- Web server and REST API-based control panels
- Wireless weather station and environment monitors
- OTA (Over-the-Air) firmware update projects
A great starting point for WiFi IoT projects before upgrading to the more powerful ESP32 platform.
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