ESP-12E is a miniature Wi-Fi module present in the market and is used for establishing a wireless network connection for microcontroller or processor. The core of ESP-12E is ESP8266EX, which is a high integration wireless SoC (System on Chip). It features ability to embed Wi-Fi capabilities to systems or to function as a standalone application. It is a low cost solution for developing IoT applications.

ESP12E Pinout Configuration
The ESP-12E module has twenty two pins and we will describe function of each pin below.
|
Pin |
Name |
Description |
|
1 |
RST |
Reset Pin of the module |
|
2 |
ADC |
Analog Input Pin for 10-bit ADC (0V to1V) |
|
3 |
EN |
Module Enable Pin (Active HIGH) |
|
4 |
GPIO16 |
General Purpose Input Output Pin 16 |
|
5 |
GPIO14 |
General Purpose Input Output Pin 14 |
|
6 |
GPIO12 |
General Purpose Input Output Pin 12 |
|
7 |
GPIO13 |
General Purpose Input Output Pin 13 |
|
8 |
VDD |
+3.3V Power Input |
|
9 |
CS0 |
Chip selection Pin of SPI interface |
|
10 |
MISO |
MISO Pin of SPI interface |
|
11 |
GPIO9 |
General Purpose Input Output Pin 9 |
|
12 |
GPIO10 |
General Purpose Input Output Pin 10 |
|
13 |
MOSI |
MOSI Pin of SPI interface |
|
14 |
SCLK |
Clock Pin of SPI interface |
|
15 |
GND |
Ground Pin |
|
16 |
GPIO15 |
General Purpose Input Output Pin 15 |
|
17 |
GPIO2 |
General Purpose Input Output Pin 2 |
|
18 |
GPIO0 |
General Purpose Input Output Pin 0 |
|
19 |
GPIO4 |
General Purpose Input Output Pin 4 |
|
20 |
GPIO5 |
General Purpose Input Output Pin 5 |
|
21 |
RXD0 |
UART0 RXD Pin |
|
22 |
TXD0 |
UART0 TXD Pin |
Features and Electrical Characteristics
- Wireless Standard: IEEE 802.11 b/g/n protocol
- Power Transmission:
|
802.11b |
+16 ± 2 dBm |
|
802.11g |
+14 ± 2 dBm |
|
802.11n |
+13 ± 2 dBm |
- Frequency Range: 2.412 - 2.484 GHz
- Serial Transmission: 110 - 921600 bps, TCP Client 5
- SDIO 2.0, SPI and UART Interface available
- PWM available
- One ADC channel available
- Programmable GPIO available
- Wireless Network Type: STA / AP / STA + AP
- Security Type: WEP / WPA-PSK / WPA2-PSK
- Encryption Type: WEP64 / WEP128 / TKIP / AES
- Network Protocol: IPv4, TCP / UDP / FTP / HTTP
- Operating Voltage: 3.3V
- Maximum current allowed to draw per pin: 15mA
- Power down leakage current of < 10uA
- Integrated low power 32-bit MCU
- Onboard PCB Antenna
- Wake up and transmit packets in < 2ms
- Standby power consumption of < 1.0mW
- Operating Temperature: -40ºC to +125 ºC

Note: Complete technical details can be found in the ESP12E Datasheet linked at the bottom of this page.
