ESP-M2 WiFi Serial Transparent Transmission Module with AT 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 .

Unlike modules that require complex programming, the ESP-M2 comes preloaded with industrial-grade AT command firmware that allows you to control all Wi-Fi functions using simple serial commands . This makes it incredibly easy to integrate into any microcontroller or computer system: just send AT commands over UART, and the module handles everything from connecting to Wi-Fi networks to sending and receiving data over TCP/IP .

Whether you need to retrofit legacy industrial equipment with wireless monitoring, build a wireless data logger, create a remote control system, or add cloud connectivity to your next IoT project, the ESP-M2 provides a reliable, cost-effective solution. Its compact form factor (34mm × 17mm), integrated PCB antenna, and wide operating voltage range (4.5V-6.0V) make it ideal for both prototyping and production use.

Key Features

• ESP8285 Core with Integrated Flash: Powered by the ESP8285 chip featuring 1 MB of integrated flash memory, eliminating the need for external flash and improving reliability .

• Preloaded AT Command Firmware: Comes with industrial-grade AT firmware (compatible with ESP8266 AT command set), allowing complete Wi-Fi control via simple serial commands—no programming required .

• 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 .

• Transparent Transmission Mode: Once configured, the module can operate in transparent transmission mode, automatically forwarding any data received over the serial port to a network connection (TCP/UDP) and vice versa .

• Built-in Web Configuration Server: Features an onboard HTTP web server that allows you to configure module parameters 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 .

• Rich Network Protocols: Supports TCP Server, TCP Client, UDP Server, UDP Client, and HTTP Client modes, with support for DNS and remote server connections .

• Ultra-Low Power Consumption: Features multiple sleep modes with deep sleep current as low as 20 µA, making it suitable for battery-powered applications .

• Wide Operating Voltage: Accepts supply voltage from 4.5V to 6.0V (5V recommended), 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 .

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

• OTA Firmware Updates: Supports Over-The-Air (OTA) firmware updates for future upgrades .

Technical Specifications