Description 3.0V to 3.6V DC (3.3V recommended, 5V not tolerant) · UART, SPI, SDIO, I2C, PWM, and 1× 10-bit Analog Input (ADC0, 0V-1.0V).
Description
The ESP-12E ESP8266 Serial Port Wi-Fi Wireless Transceiver Module is a compact, highly integrated wireless microcontroller module designed for Internet of Things (IoT) hardware, smart home sensors, and remote monitoring projects. Powered by Espressif's 32-bit Tensilica Xtensa L106 RISC CPU running at 80 MHz (up to 160 MHz), it provides standalone processing capability alongside 2.4 GHz Wi-Fi (802.11b/g/n) connectivity.
This "E" variant improves upon earlier ESP-12 iterations by breaking out additional GPIO and SPI pins along the bottom edge, providing 22 total pin connections for extended sensor and memory interfacing. The module includes 4MB (32Mbit) external SPI flash memory, an onboard meandered PCB antenna, an integrated TR switch, power amplifier (PA), and low-noise amplifier (LNA).
Designed to operate on a regulated 3.0V to 3.6V DC power supply (nominal 3.3V) with 3.3V logic levels, the module can be controlled via standard AT commands using an external microcontroller (like an Arduino) via UART, or programmed directly as a standalone board using NodeMCU, MicroPython, or the Arduino IDE.
| Core Processor | Espressif ESP8266EX 32-bit Tensilica Xtensa L106 RISC CPU @ 80 MHz / 160 MHz |
|---|---|
| Onboard Memory | 4MB (32Mbit) SPI Flash memory + 80KB User SRAM |
| Wireless Protocol | 2.4 GHz Wi-Fi (802.11b/g/n, up to 150 Mbps) with WPA/WPA2 security support |
| Wi-Fi Modes | Station (STA), Soft Access Point (SoftAP), and STA + SoftAP dual modes |
| Antenna Type | Onboard 3dBi 2.4GHz PCB trace antenna |
| Operating Voltage | 3.0V to 3.6V DC (3.3V recommended, 5V not tolerant) |
| Interfaces & I/O | UART, SPI, SDIO, I2C, PWM, and 1× 10-bit Analog Input (ADC0, 0V-1.0V) |
| Low Power Support | Ultra-low power consumption with Deep Sleep mode (<10µA) |
| Package Style | Standard 22-pin SMD castellated module with 2.0mm pin pitch |
What is the operating voltage?
3.0V to 3.6V DC (3.3V recommended, 5V not tolerant).
Which interface does it use?
2.4 GHz Wi-Fi (802.11b/g/n, up to 150 Mbps) with WPA/WPA2 security support.
Is it compatible with Arduino and ESP8266?
Yes. It works with Arduino, ESP8266, NodeMCU, STM32 projects.
Can I buy the ESP-12E: ESP8266 Serial Port WIFI Wireless Transceiver Module in Kanpur?
Yes – buy online with delivery across India, or pick it up from the iTechBuilders store, Damodar Nagar, Kanpur.
