ESP-M2 WiFi Serial Transparent Transmission Module with 6PIN compatible HC06 interface (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. What sets this module apart is its 6-pin interface that is fully compatible with the popular HC-06 Bluetooth module —allowing you to instantly upgrade existing Bluetooth projects to WiFi without changing your hardware setup or code .

Built around the powerful ESP8285 chip (an enhanced version of the legendary ESP8266 with integrated flash memory), this module comes preloaded with industrial-grade transparent transmission firmware V3.0 . This means it works right out of the box: simply power it up, connect to its built-in web interface for configuration, and it will automatically forward any data received over the serial port to a Wi-Fi network (and vice versa) .

Whether you need to retrofit legacy industrial equipment with wireless monitoring, build a wireless data logger, or add cloud connectivity to your next IoT project, the ESP-M2 provides a reliable, cost-effective solution with the added benefit of seamless HC-06 compatibility.

Key Features

• HC-06 Pin-Compatible Interface: Features a 6-pin interface that is fully compatible with the original electrical and physical interface of serial transparent Bluetooth modules (HC-06). This allows you to replace Bluetooth with WiFi without changing your PCB or wiring .

• Preloaded Industrial-Grade Firmware: Comes with built-in serial transparent transmission firmware V3.0, which is stable, reliable, and configurable via a web browser—no programming required .

• ESP8285 Core with Integrated Flash: Powered by 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 .

• 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 .

• Seamless Transparent Transmission: Automatically forwards data between the serial port and a TCP/UDP connection. Once configured, the module acts as a wireless serial cable replacement .

• Rich Network Protocols: Supports TCP Server, TCP Client, UDP Server, UDP Client, and UDP local broadcast modes, with support for DNS and automatic reconnection .

• 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 (5V tolerant) .

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

• 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, with an onboard LED for visual status .

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

Technical Specifications