ESP-M2 WiFi Serial Transparent Transmission Module (Preloaded Firmware)

Description

Product Overview

The ESP-M2 WiFi Serial Transparent Transmission Module is a compact, high-performance wireless communication solution designed to bridge the gap between serial devices and Wi-Fi networks. Built around the powerful ESP8285 chip—an enhanced version of the legendary ESP8266 with integrated flash memory—this module provides a seamless “plug-and-play” solution for adding wireless connectivity to your existing projects .

What sets the ESP-M2 apart is its preloaded transparent transmission firmware. This means the module comes ready to use right out of the box: simply connect it to your device’s UART (serial) port, and it will automatically forward any data received over the serial interface to a Wi-Fi network (and vice versa) . There is no need for complex programming or custom firmware development—the module handles all the network protocol details automatically .

Whether you need to retrofit legacy industrial equipment with wireless monitoring, build a wireless data logger, or create a remote control system for a robot or smart home device, the ESP-M2 provides a reliable, cost-effective solution. Its integrated PCB antenna delivers solid wireless performance, while its ultra-low power consumption (down to 20µA in deep sleep) makes it suitable for battery-powered applications .

Key Features

• Plug-and-Play Serial-to-WiFi Bridge: Preloaded with industrial-grade transparent transmission firmware (V3.0) that automatically forwards data between your serial device and a Wi-Fi network—no programming required .

• Integrated 32-bit Processor: Built around the ESP8285 chip (ESP8266 with integrated 1MB flash), featuring a Tensilica L106 32-bit RISC processor running at up to 160 MHz .

• Complete Wi-Fi Solution: Supports 802.11 b/g/n protocols at 2.4 GHz with integrated PCB antenna. Delivers up to 15dBm output power with excellent receiver sensitivity down to -96dBm .

• Rich Interface Options: Provides UART, SPI, I2C, I2S, PWM, and 10-bit ADC interfaces, allowing connection to a wide variety of sensors and actuators .

• Built-in Web Configuration Server: Features an onboard HTTP web server that allows you to configure all module parameters (Wi-Fi credentials, network mode, serial settings, etc.) through a simple web browser—no additional software or apps required .

• Multiple Operating Modes: Supports Station (STA), Access Point (AP), and Station+AP 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. Wake up and transmit packets in less than 2 ms .

• Wide Operating Voltage: Accepts supply voltage from 4.5V to 6.0V (recommended 5V), with TTL logic levels compatible with both 3.3V and 5V systems .

• Industrial Temperature Range: Rated for operation from -40°C to +125°C, making it suitable for demanding industrial environments and outdoor installations .

• OTA Firmware Updates: Supports Over-The-Air (OTA) firmware updates, allowing you to upgrade the module’s firmware wirelessly .

• State Indicator Output: Provides a dedicated STATE pin (GPIO4) that outputs a low signal when the module is successfully connected to a Wi-Fi network, simplifying status monitoring .

Technical Specifications