Description
Product Overview
The ESP-12E ESP8266 Serial WiFi Module is a high-performance, feature-rich wireless communication module that has become the gold standard for IoT and embedded systems development. Manufactured by Ai-Thinker, one of the most trusted names in IoT modules, the ESP-12E is built around the revolutionary ESP8266EX chip from Espressif Systems —a complete Wi-Fi SoC (System on Chip) that integrates a 32-bit microcontroller, Wi-Fi radio, and TCP/IP protocol stack into a compact 16mm × 24mm package .
What sets the ESP-12E apart from simpler modules like the ESP-01 is its exceptional I/O availability. With 22 accessible pins, including 11 usable GPIOs, the ESP-12E provides the flexibility needed for complex projects without requiring external I/O expanders . It features a 4MB (32Mbit) flash memory , providing ample space for firmware, web interfaces, and OTA (Over-The-Air) updates .
The module supports 802.11 b/g/n Wi-Fi protocols with a maximum output power of +20dBm, ensuring robust wireless connectivity. It can operate in Station (STA), Access Point (AP), or Station+AP modes, giving you the flexibility to connect to existing networks or create your own . Whether you’re building smart home devices, industrial sensors, or wearable electronics, the ESP-12E delivers the processing power, I/O flexibility, and wireless reliability your project demands.
Key Features
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Powerful 32-bit Processor: Built around the Tensilica L106 32-bit RISC processor running at up to 160 MHz, providing ample processing power for complex IoT applications without requiring an external microcontroller .
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Rich I/O Capabilities: Features 11 usable GPIO pins with support for UART, SPI, I2C, I2S, PWM, and 10-bit ADC interfaces, allowing connection to a wide variety of sensors, actuators, and display devices .
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4MB Flash Memory: Equipped with 4MB (32Mbit) of flash memory, providing abundant storage for firmware, web interfaces, and OTA (Over-The-Air) firmware updates .
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Complete Wi-Fi Solution: Supports 802.11 b/g/n protocols with integrated TR switch, balun, LNA, power amplifier, and matching network. Delivers up to +20dBm output power with excellent receiver sensitivity .
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Multiple Operating Modes: Supports Station (STA), Access Point (AP), and Station+AP modes, enabling devices to connect to existing networks or create their own.
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Integrated TCP/IP Stack: Features an embedded LWIP protocol stack with support for TCP, UDP, HTTP, FTP protocols, enabling seamless internet connectivity .
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Ultra-Low Power Consumption: Features multiple sleep modes with deep sleep current as low as 20µA , making it ideal for battery-powered applications .
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Smart Configuration Support: Compatible with Smart Config and AirKiss one-click network configuration technologies, simplifying device onboarding .
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Industrial Temperature Range: Rated for operation from -40°C to +125°C, making it suitable for demanding industrial environments and outdoor installations .
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SMD Package for Automated Assembly: The SMD-22 package (half-hole pads) is designed for automated surface-mount assembly, making it suitable for large-scale production while remaining accessible for hand soldering .
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Comprehensive Security: Supports WPA/WPA2 security protocols, ensuring secure wireless communication .
Technical Specifications
| Parameter | Operating Value |
|---|---|
| Module Model | ESP-12E |
| Core Chip | ESP8266EX |
| Processor | Tensilica L106 32-bit RISC |
| Clock Speed | 80 MHz (supports 160 MHz) |
| Flash Memory | 4 MB (32 Mbit) |
| SRAM | 80 KB |
| Operating Voltage | 3.0V – 3.6V DC |
| Peak Current (Transmitting) | 170mA |
| Average Current | 80mA |
| Deep Sleep Current | 20 µA |
| Wireless Standard | 802.11 b/g/n |
| Frequency Band | 2.4 GHz (2412 MHz – 2484 MHz) |
| Output Power | +20 dBm (802.11b mode) |
| Receiver Sensitivity | -98 dBm |
| Antenna | PCB trace antenna |
| Interfaces | UART, SPI, I2C, I2S, PWM, ADC |
| ADC Resolution | 10-bit |
| UART Baud Rate | Up to 4 Mbps |
| Operating Temperature | -40°C to +125°C |
| Module Dimensions | 24.0mm × 16.0mm × 3.0mm |
| Package Type | SMD-22 (half-hole pads) |
| Weight | 3g (approx.) |







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