ESP-WROOM-02 Wi-Fi Shield

This is a shield with ESP-WROOM-02 Wi-Fi module. It allows Wi-Fi communication on a micro controller board such as Arduino Uno R3 etc.

This product communicates with Arduino by serial. Please use the slide switch to choose hardware serial or software serial.

5 V or 3.3 V can both be connected to the micro controller board by using jumper socket to choose the preferred I/O voltage.

It's handy when you want Wi-Fi communication by micro controller boards with pins headers compatible with Arduino Uno R3, for example FRDM-K64F.

The pin header is not included. Please purchase them separately and solder them depending on your usage.


  • ESP-WROOM-02 Wi-Fi module
  • Serial communication pin switcher (choose by slide switch)
    • Arduino hardware serial: D0 (H TXD) D1 (H RXD)
    • Arduino software serial: D2 (S TXD) D4 (S RXD)
  • Micro controller board I/O Voltage changeover (choose by jumper socket JP2)
    • 5 V or 3.3 V
  • Rearrange reset button
    • SJ1: Short (default) ESP-WROOM-02 reset valid
    • SJ1: Disconnect ESP-WROOM-02 reset invalid
    • SJ2: Short (default) Arduino reset valid
    • SJ2: Disconnect Arduino reset invalid
  • Universal area
  • ESP-WROOM-02 Firmware re-writing port JP1


  • Shield × 1
  • Jumper socket × 1


ESP-WROOM-02 Wi-Fi Shield
Name ESP-WROOM-02 Wi-Fi Shield
Code SSCI-026192
SKU# 2619
Shipping EMS
Price: 25.00 USD
  • ESP-WROOM-02 is a 32-bit low power micro-controller (MCU) Wi-Fi Module that integrates TCP/IP network stacks, and includes 10-bit ADC with HSPI, SDIO, UART, PWM, I2C, and I2S interfaces.The highlight of this board is an FT231X USB-to-Serial converter. That’s what translates data between your computer and ESP-WROOM-02.

    Shipping Method: EMS Price: 18.00 USD
  • ESP-WROOM-02 WiFi module is loaded on Arduino compatible board. There are redundant pins on this board, because GPIO pins of ESP-WROOM-02 are lesser than Arduino. Only one A0 analog input pin. Although it is compatible to Arduino please be aware that it might not operate properly depending on choice of shield. Please refer to How to develop with Arduino IDE for more details. Operating voltage of input/output pin is 3.3 V.

    Shipping Method: EMS Price: 23.99 USD
  • Arduino Stackable Header Kit - R3

    Shipping Method: EMS Price: 1.80 USD