ESP-02S Wireless WiFi Module with Serial Communication

Description

Product Overview

The ESP-02S Wireless WiFi Module is a compact, high-performance wireless transceiver designed for seamless integration into IoT and embedded systems. Manufactured by DOIT (Sibo Zhilian) , a trusted name in IoT modules, the ESP-02S is built around the powerful ESP8285 chip from Espressif Systems—a close relative of the legendary ESP8266 with integrated flash memory for enhanced reliability and compactness .

The ESP8285 chip features a Tensilica L106 32-bit RISC processor running at up to 160 MHz, with 16 Mbit (2 MB) of built-in flash memory. This eliminates the need for external flash chips, reducing PCB complexity and improving overall system reliability . The module supports 802.11 b/g/n Wi-Fi protocols at 2.4 GHz and includes a complete TCP/IP protocol stack, making it a complete system-on-chip (SoC) capable of running application code independently .

What sets the ESP-02S apart is its gold finger packaging—a convenient edge-connector design that allows for plug-in assembly, making it ideal for automated production and easy integration into custom PCBs . Whether you are building smart home devices, industrial IoT sensors, or wireless control systems, the ESP-02S delivers reliable performance in a compact form factor (17.3mm × 15mm) .

Key Features

• ESP8285 Core with Integrated Flash: Powered by the ESP8285 chip featuring 16 Mbit (2 MB) of built-in flash memory , eliminating the need for external flash and improving reliability .

• Powerful 32-bit Processor: Built around the Tensilica L106 32-bit RISC processor running at up to 160 MHz, providing ample processing power for complex IoT applications without requiring an external microcontroller .

• Complete Wi-Fi Solution: Supports 802.11 b/g/n protocols at 2.4 GHz with integrated TR switch, balun, LNA, power amplifier, and matching network . Delivers up to 15 dBm output power with excellent receiver sensitivity down to -96 dBm .

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

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

• 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) . Wake up and transmit packets in less than 2 ms, making it ideal for battery-powered applications .

• Gold Finger Package: The module features convenient gold finger edge connectors, allowing for easy plug-in assembly and reliable connections in production environments .

• Smart Configuration Support: Compatible with Smart Config technology for one-click network configuration, simplifying device onboarding for Android and iOS devices .

• Developer-Friendly: Fully supported in Arduino IDE, MicroPython, NodeMCU (Lua), and ESP-IDF. A vast online community provides extensive libraries and code examples.

• Comprehensive Security: Supports WEP/WPA/WPA2-PSK security protocols, ensuring secure wireless communication .

Technical Specifications