ESP8266 ESP-12E Serial to Wi-Fi Module


  • ESP8266 ESP-12E Serial to Wi-Fi module ready for Arduino IDE, MicroPython, Espruino, NodeMCU, AT+Commands
  • 16 Digital, 1 Analog GPIO; PWM, ADC, I2C and 1-Wire available
  • Access to all ESP8266 pins (17GPIO, CH_PD, ADC, Power, Ground, and Reset)
  • 3.3V input power; typically used for soldering onto a PCB (castellated pins)



The ESP8266 Serial-to-WiFi adapter created by Espressif has seen a wide adoption as a cost-effective solution for IoT and WiFi-capable devices. This tiny-sized System On a Chip (SoC) includes an 80 MHz microcontroller with a full WiFi front-end (both as client and access point) as well as a full TCP/IP stack with DNS. Because the ESP8266 comes only in a Surface-Mount package, a few different vendors have developed modules labeled ESP-NN where NN are numbers ranging from 01 to 13 (at the time of this writing).

Like all ESP-NN modules, the ESP-12E has a small footprint. Even though its castellated pins make it hard to work with on a breadboard, they are easy to solder to a PCB. The ESP-12E module breaks out all the usable GPIO of the ESP8266, and it carries a visible LED for indicating status. Under the tin can, the ESP-12E has a 4MB SPI flash storage IC–typically the Winbond W25Q32FV, and other necessary components. It also includes an onboard antenna (~–80dBm @50ft).


  • 17 GPIO (save for D0, every GPIO can be PWM, I2C (software), 1-wire)
  • ESP-12E Wi-Fi module containing the ESP8266 IC
  • Onboard copper-trace antenna (Meandered Inverted-F Antenna (MIFA))
  • Integrated TCP/IP stack
  • 22 castellated-pin 2mm-pitch configuration


  • Supported protocols: 802.11 b/g/n
  • Serial/UART baud rate: 115200bps
  • Input voltage: 3.3V
  • Max I/O voltage: 3.6V
  • Regular operation current draw: ~70mA
  • Current draw (peak): ~300mA
  • Power-down leakage current: <10µA
  • Output power: +19.5dBm (802.11b)
  • Flash Memory Size: 1MB (8Mbit)
  • WiFi security modes: WPA, WPA2
  • Module’s dimensions: 24.75mm x 14.5mm (0.974″ x 0.571″)

Additional information

Product Dimensions

0.63 x 0.94 x 0.12 inches

Item Weight

0.32 ounces



Item model number


Customer Reviews

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Date First Available

March 17, 2016




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