Yellow Board ESP8266 - WiFi module ESP-12E + battery holder

Index: MOD-05594

Board with the wifi ESP-12E module with connectors in the form of goldpin pins. Led out are 9 GPIO 1 analogue input and RX, TX, RESET, CH_PD pins, power supply and ground. Also on board are LEDs, photoresistor and the voltage regulator of 3.3 V. In addition, the chip has a holder that allows for the power supply using three AA batteries.

Yellow Board ESP8266 - WiFi module ESP-12E + battery holder
€4.88 tax excl.
Discontinued product
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Manufacturer: OEM


The product has been discontinued. Check other products incategory.


Board with the wifi ESP-12E module with connectors in the form of goldpin pins. Led out are 9 GPIO 1 analogue input and RX, TX, RESET, CH_PD pins, power supply and ground. Also on board are LEDs, photoresistor and the voltage regulator of 3.3 V. In addition, the chip has a holder that allows for the power supply using three AA batteries.


The system has a holder for 3 AA batteries- not included, sold separately.


Features of the Yellow Board with ESP-12E

  • It has 19 goldpin pins, 2.54 mm pitch:
    • 9 x GPIO - digital outputs/inputs
    • 1 x ADC input - digital-to-analog converter
    • UART (TX, RX) - for communicating, for example, with Arduino
    • CH_PD pin 
    • VCC - supply voltage of 3.3 V
    • GND - ground of the system
  • The default transfer rate of UART communication: 115200 bps
  • The jumper to connect the GPIO0 pin with the ground
  • Built-in LEDs, including one LED RGB
  • Mounted sensor of light, photoresistor connected to the analog input
  • Connected to the holder for 3 AA batteries for powering the system
  • It is equipped with built-in PCB antenna
  • Dimensions: 51 x 42 mm



The module has led out connectors of the ESP-12E module onthe goldpin strap, pitch of 2.54 mm.


Pin Description
TxD The transmitter of the serial UART interface.
RxD The receiver of the serial UART interface.
GPIO x GPIO pin (digital output/ input) with a serial number.
Jumper Combines GPIO0 with the ground. To update, you need to indicate the low status (i.e. leave the jumper).

GPIO No. 15 with a special function:

In normal operation and programming, it should indicate the low status (connect to GND).

ADC Analog / digital converter input - combined with built-in light sensor - photoresistor.
REST The system reset.
CH_PD Power down - indicating the low status causes a transition into sleep mode.

To update, you need to indicate a high status (3.3 V).

VCC The power supply - 3.3 V.
GND The ground of the system.


Software update

To communicate with the Arduino or using the AT commands, we recommend the software update using the XTCOM_UTIL software. To do this:

  1. Downloadthe software from our website
  2. On the module connect the pins:
    1. GPIO0 with ground - using the jumper
    2. GPIO15 with ground
    3. REST with VCC
    4. CH_PD with VCC
  3. To connect the ESP module through the USB-UART converter 
  4. In the program select Tools -> Config Device
  5. Choose the correct COM port, open it, and connect with the ESP chip
  6. Leaving open a window of Device Config, select the API TEST> Flash Image Download
  7. Choose firmware: ESP8266 v0.9.5.0 AT Firmware.bin and upload by clicking Download


The procedure was presented in the video:



The product is compatible with Arduino

Instruction of connecting the module with Arduino basing on the module ESP-01, you can find on the blog Majsterkowo and in guide prepared by us.


The board tolerates a voltage of 3.3 V. Therefore, you must choose Arduino operating with the voltage of 3.3 V or use a converter.



  • Supply voltage: 3.3 V
  • Current consumption at rest: approx. 10 µA
  • Chip: ESP8266
  • Standard: wi-fi 802.11 b/g/n
  • It operates in the 2.4 GHz frequency
  • It supports WPA / WPA2
  • It can work in AP mode (Access Point), STA mode (standalone) and AP+STA mode
  • It supports AT commands
  • Communication: UART (Rx, Tx)
  • The default UART speed: 115200 bps
  • Lua software support 
  • Dimensions of board: 51 x 42 mm


UC - Microcontroller ESP-8266
Package width 0.001 cm
Package height 0.001 cm
Package depth 0.001 cm
Package weight 0.001 kg

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