ESP8266 Serial WiFi Module – ESP-WROOM-02 (2MB Flash, 16Mbit, UART Wireless)

Description

Product Overview

The ESP-WROOM-02 is a highly integrated, certified Wi-Fi module developed by Espressif Systems, the original creator of the ESP8266 ecosystem. This module represents the official, production-ready implementation of the ESP8266EX chip, offering reliable RF performance, comprehensive certifications, and a compact form factor that is ideal for both prototyping and mass production.

At its heart lies the ESP8266EX chip—a 32-bit Tensilica L106 RISC processor running at up to 160 MHz, with 2MB (16Mbit) of SPI flash memory integrated into the module. This provides ample storage for firmware, web interfaces, and OTA (Over-The-Air) updates. The module supports 802.11 b/g/n Wi-Fi protocols at 2.4 GHz, with a built-in PCB antenna that delivers up to +19.5 dBm output power and excellent receiver sensitivity down to -98 dBm.

Unlike many third-party ESP8266 modules, the ESP-WROOM-02 is designed and manufactured by Espressif, ensuring full compliance with RF certifications including FCC, CE, and Wi-Fi Alliance, making it the ideal choice for commercial products requiring regulatory approval. It comes preloaded with AT command firmware, allowing you to add Wi-Fi connectivity to any microcontroller using simple serial commands, or you can reprogram it as a standalone IoT processor using the Arduino IDE, MicroPython, or ESP-IDF.

Whether you are building smart home devices, industrial sensors, wireless data loggers, or consumer electronics, the ESP-WROOM-02 delivers the reliability, performance, and certification readiness your project demands.

Key Features

• Official Espressif Module: Designed and manufactured by Espressif Systems, the creators of the ESP8266, ensuring the highest quality and reliable RF performance.

• Integrated 32-bit Processor: Powered by the Tensilica L106 32-bit RISC processor running at up to 160 MHz, capable of running application code independently without an external microcontroller.

• 2MB Flash Memory: Equipped with 2 MB (16 Mbit) of SPI flash memory, providing sufficient storage for firmware, web interfaces, and OTA (Over-The-Air) firmware updates.

• Complete Wi-Fi Solution: Supports 802.11 b/g/n protocols at 2.4 GHz with integrated PCB antenna (2 dBi gain). Delivers up to +19.5 dBm output power with receiver sensitivity down to -98 dBm.

• Preloaded AT Command Firmware: Ships with industrial-grade AT firmware that allows control via simple serial commands, enabling rapid integration with any microcontroller.

• Multiple Operating Modes: Supports Station (STA), SoftAP (Access Point), and SoftAP + STA modes, enabling devices to connect to existing networks or create their own.

• Rich Peripheral Interfaces: Provides UART, HSPI, I2C, I2S, IR Remote Control, PWM, and 10-bit ADC interfaces, allowing connection to a wide variety of sensors, actuators, and display devices.

• Ultra-Low Power Consumption: Features multiple sleep modes with deep sleep current as low as 20 µA and standby power consumption less than 1.0 mW (DTIM3), making it ideal for battery-powered applications.

• Global Regulatory Certifications: Certified with FCC, CE, Wi-Fi Alliance, RoHS, and REACH, simplifying the certification process for commercial products.

• Wide Operating Temperature: Rated for operation from -40°C to +85°C, suitable for demanding industrial environments and outdoor installations.

• Compact SMD Package: Measures just 18.0mm × 20.0mm × 2.8mm with 18 castellated pins, designed for automated surface-mount assembly.

• Upgradable Firmware: Supports local serial flashing, OTA (Over-The-Air) updates, and host download for flexible firmware management.

Technical Specifications