Home / ESP-WROOM-02U - Low-Power Wi-Fi Module with U.FL (IPEX) Connector

ESP-WROOM-02U - Low-Power Wi-Fi Module with U.FL (IPEX) Connector: 4MB Flash

$3.25

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SKU: GC-ESP-WROOM-02U-N4

MPN: ESP-WROOM-02U-N4

Manufacturer: Espressif Systems

Delivery: Ships within 7-14 business days
Free shipping to the US on orders over $100

Flash Memory

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Product Information

Product Description

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The ESP-WROOM-02U is a compact, low-power, Wi-Fi module incorporating the ESP8266EX chip. The device supports an external U.FL (IPEX) connector for optimized RF performance. It’s low power consumption and compact size (18 x 14.3 x 3.2 mm) makes the device essential for Internet of Things (IoT) applications.

Common applications include:

  • Internet of Things (IoT) solutions
  • Industrial wireless control
  • Wearable electronics
  • Home automation
  • Sensor networks
  • Wi-Fi location-aware devices

 

The ESP8266EX chip provides a Tensilica L106 32-bit RISC processor with a maximum clock speed of 160 MHz. The chip supports SPI flash memory with options of 2MB or 4MB and works with the following SPI modes:

  • Standard SPI
  • DIO (Dual I/O)
  • DOUT (Dual Output)
  • QIO (Quad I/O)
  • QOUT (Quad Output)

 

The WROOM-02U is customizable with 80% of the processing power available for development through the Real-Time Operating System (RTOS) and Wi-Fi stacks. GitHub provides additional information and code examples.

 

 

Compare ESP-WROOM-02 Series

Order Summary

 

SKU

Flash Memory

Operating Temperature

Manufacturer Part # (MPN)
GC-ESP-WROOM-02U (SALE) 2 MB -40ºC to 85ºC (-40ºF to 185ºF) ESP-WROOM-02U
GC-ESP-WROOM-02U-N4 4 MB -40ºC to 85ºC (-40ºF to 185ºF) ESP-WROOM-02U-N4
GC-ESP-WROOM-02U-H2 2 MB -40ºC to 105ºC (-40ºF to 221ºF) ESP-WROOM-02U-H2

Features

  • Wi-Fi 802.11 b/g/n
  • Integrates with the ESP8266EX chip
  • External U.FL (IPEX) connector
  • Optimized RF performance
  • 2 MB or 4 MB SPI flash memory
  • Tensilica L106 32-bit RISC processor
  • 26-MHz crystal oscillator
  • Secure (encrypted) over the air (OTA) upgrades
  • SRRC, FCC, CE (RED), IC, NCC, KCC, TELEC (MIC) certified
  • Programmable RAM/ROM interface (iBus)
  • Programmable Data RAM interface (dBus)
  • AHB interface accesses the register

Documents and Drivers

Documentation

ESP-WROOM-02U Datasheet

ESP8266 Datasheet

ESP8266 Quick Start Guide

Downloads

ESP8266 AT Bin

Specifications

Antennas

External U.FL (IPEX) connector

Certifications

  • RF: SRRC, FCC, CE (RED), IC, NCC, KCC, TELEC (MIC)
  • Green: RoHS, REACH

Dimensions

18 mm x 14.3 mm x 3.2 mm

Firmware

  • Upgrade: UART Download / OTA (via network)
  • Download and write firmware via host

Frequency Band

Wi-Fi frequency: 2.4 GHz ~ 2.5 GHz (2400M ~ 2483.5M)

Interface(s)

  • UART/HSPI/I2C/I2S/IR Remote Control
  • GPIO/PWM

Memory

2 MB or 4 MB

MPN

ESP-WROOM-02U

Pins

18

Power

  • Average Current: 80 mA
  • Minimum Current: 500 mA

Protocols

  • Wi-Fi: 802.11 b/g/n (802.11n up to 150 Mbps)
  • Network: IPv4, TCP/UDP/HTTP/FTP

Security/Protection

  • Security: WPA/WPA2
  • Encryption: WEP/TKIP/AES

Software

  • Supports Cloud Server Development
  • SDK for custom firmware development

Temperature Range

  • Operating: -40ºC to 85ºC (-40ºF to 185ºF)
  • Storage: -40ºC to 85ºC (-40ºF to 185ºF)
  • High Temp option: -40ºC to 105ºC (-40ºF to 221ºF)

Timers

On board clock: 26 MHz crystal

Voltage

Operating: 2.7V ~ 3.6V

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