ESP-WROOM-02 Wi-Fi Module

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  • Product Code: WIF-ESP-WROOM02
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  • Warranty Period: 12 months

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ESP-WROOM-02 is the famous WiFi module from Espressif System, the company that produce ESP8266 WiFi chip. This the SMD version with FCC/CE/TELEC certification.

This module is a highly integrated WiFi 802.11 b/g/n module that consumes extremely low power while providing a wireless internet connection for embedded devices. With a very small form factor (18mm by 20mm), this wireless module easily assimilates into resource limited devices. These features make it a great choice for OEMs to connect their IoT (Internet of Things) applications.

ESP-WROOM-02 is a 32-bit low power micro-controller (MCU) that integrates with TCP/IP network stacks; the included 10-bit ACD interfaces with HSPI, SDIO, UART, PWM, I2C and I2S. Programs and firmware can be stored in the integrated SPI flash with 16Mbits (2MB) capacity.

Note: This is SMD version, please consider take this ESP8266 module (ESP01), or NodeMCU if you are beginner.

  • 802.11 b/g/n
  • Fast sleep/wake context switching
  • Adaptive radio biasing
  • Advance signal processing
  • Integrated low power 32-bit MCU
  • Built in SPI Flash: 16MBit, 2MB
  • Integrated TCP/IP protocol stack
  • Integrated TR switch, balun, LNA, power amplifier and matching network
  • Integrated PLL, regulators and power management unit
  • Supports security protocols WPA/WPA2
  • Supports Station / SoftAP / Station+SoftAP operation modes
  • Supports Tranmission Control Protocol (TCP) and User Datagram Protocol (UDP)
  • Supports WiFi Protected Setup (WPS) for easy setup and configuration
  • Supports mesh networking
  • Supports Smart Link Function for both Android and iOS devices
  • Supports Cloud Server Development
  • Custom firmware development via SDK
  • Download and write firmware via host
  • User configuration via AT Instruction Set, Cloud Server and Android/iOs App
  • FCC, CE and TELEC certified


  • Model: ESP-WROOM-02
  • Wireless Standard: IEEE 802.11b/g/n
  • Frequency Range: 2.412GHz - 2.484GHz
  • Hardware Interface: UART, I2C, PWM, GPIO, ADC, SPI
  • Operating voltage: 3.0 - 3.6VDC
  • Wireless Network Type: STA/AP/STA+AP
  • Security: WEP/WPA-PSK/WPA2-PSK
  • Encryption: WEP64/WEP128/TKIP/AES
  • Firmware Upgrade: UART or OTA Remote Upgrade
  • Network Protocol: IPv4, TCP/UDP/FTP/HTTP
  • Dimension: 18mm x 20mm x 3mm
  • Antenna: 3dBi PCB on-board antenna
Packing List
  • 1 x ESP-WROOM-02 WiFi Module (SMD)
Q & A (3)
What is the purpose of the bottom solder pad? I can't find the info about it in the datasheet. ( Adam Tan , 30/08/2019 )
Hi, it is for the cooling purposed. You can choose to solder it or not.
Hi, can this substitute for WiFi Serial Transceiver Module (ESP8266)? I very desperate to have wifi connection to my Maker Uno. But your wifi module out of stock too long~~ ( Finux Leong, 06/02/2018 )
Hi, yes you can. But this package is not suitable for beginner. You can consider to use our ESPresso Lite V2 and refer to ESPresso Lite V2 with AT Firmware tutorial. For further questions, please visit to our technical forum for similar question or post your question there, as this session is only for short inquiry. Thanks.
Where can I find the EAGLE library for this badboy? ( wroom02, 07/10/2017 )
Hi, sorry we do not have it. You may search online here is one of it, Eagle Library.

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Tags: esp-wroom-02, wi-fi, module, wifi, ESP8266 wif-esp-wroom02