The ESP-12E is a compact, high-performance Wi-Fi module built around the ESP8266EX system-on-chip. It integrates a 32-bit microcontroller and a full TCP/IP Wi-Fi stack into a small form factor, allowing it to function as both a standalone controller and a Wi-Fi transceiver for embedded systems.

As an enhanced revision of the ESP-12, the ESP-12E offers improved RF stability and a practical number of accessible GPIO pins. This makes it well-suited for IoT devices, smart systems, wireless sensors, and automation projects.

Core Specifications

Processor: Tensilica L106 32-bit CPU (80 MHz default, up to 160 MHz)

Flash Memory: 4 MB

SRAM: 80 KB

Operating Voltage: 3.3 V only (not 5 V tolerant)

Wi-Fi Standard: 2.4 GHz IEEE 802.11 b/g/n

GPIO Pins: 11 digital GPIO

Analog Input: 1 ADC (10-bit)

Communication Interfaces: UART, SPI, I2C (software), PWM

Total Pins: 22

Antenna: Integrated PCB trace antenna

Key Advantages

Affordable Wireless Solution
Provides an economical way to add Wi-Fi connectivity to embedded and IoT systems without requiring an external microcontroller.

Multiple Programming Options
Supports development using Arduino IDE, MicroPython, and Lua (NodeMCU firmware), giving flexibility across different skill levels and project needs.

Ultra-Low Power Capability
Features deep sleep mode with current consumption below 20 µA, making it highly suitable for battery-powered and energy-efficient applications.

Balanced I/O and Size
Compared to modules like the ESP-01 or ESP-12F, the ESP-12E offers a better balance between available GPIO pins, compact dimensions, and stable wireless performance.