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Detailed Description:

Bridge the gap between your microcontrollers and the vast world of wireless communication with the RM04 UART to WiFi Module. This compact and highly efficient serial-to-WiFi converter is an invaluable tool for adding network connectivity to virtually any embedded system that communicates via UART (Universal Asynchronous Receiver-Transmitter) or TTL serial. It acts as a transparent data pipe, allowing your device to send and receive data wirelessly over a Wi-Fi network (802.11 b/g/n) without the need for complex network programming on the host microcontroller.

The RM04 module simplifies IoT integration by providing a straightforward interface. Operating at a typical 3.3V power supply (with a wide input range usually supported by internal regulation), it offers stable and reliable performance. It supports common serial communication parameters, including configurable baud rates (e.g., 9600, 115200 bps), data bits, parity, and stop bits, ensuring compatibility with a wide range of devices. The module can operate in various network modes, including AP (Access Point) mode for direct connection with client devices, Station (STA) mode to connect to existing Wi-Fi networks, and even AP+STA concurrent mode.

Configuration of the RM04 is typically achieved through AT commands sent over the serial interface, allowing you to set network parameters like SSID, password, IP address, and port number for both TCP and UDP connections. This makes it incredibly flexible for diverse applications, from remote data logging and sensor monitoring to controlling industrial equipment and developing smart home devices. Its low power consumption, especially in idle states, makes it suitable for battery-powered projects. The RM04 UART to WiFi Module is a cost-effective and powerful solution for transforming your traditional serial devices into intelligent, wirelessly connected components.

The RM04 WiFi Serial Module is a compact wireless networking solution that converts UART/TTL data into WiFi signals, allowing microcontroller-based systems to connect wirelessly to networks or communicate with PCs, smartphones, or other WiFi-enabled devices. It supports both Station (STA) and Access Point (AP) modes and offers a web-based configuration interface for easy setup.

This module is widely used in home automation, IoT, sensor networks, wireless serial communication, and remote device monitoring. It can act as a transparent serial bridge, allowing microcontrollers to send/receive data wirelessly without heavy WiFi stack coding.

Key Features:

• Converts UART serial communication to WiFi

• Supports both AP (Access Point) and STA (Station) modes

• Built-in web configuration interface via browser

• Compatible with 3.3V logic level microcontrollers

• Supports TCP, UDP, DHCP, HTTP protocols

• Can act as TCP server, TCP client, or UDP peer

• Transparent data transmission mode (like serial over WiFi)

• Compact and lightweight design

• Firmware upgradeable via network

Technical Specifications:

How to Use:

1. Power the module with a stable 3.3V power source.

2. Connect TX and RX pins to your microcontroller (use 3.3V logic).

3. Connect to the module’s WiFi network (AP mode) or connect it to your router (STA mode) using a browser.

4. Access the web config at 192.168.1.1 or 192.168.4.1 (default).

5. Set parameters like Baud Rate, WiFi mode, SSID, and Password.

6. Use as a serial-to-WiFi bridge for wireless data transmission.

Use level shifters if your MCU uses 5V logic to avoid damaging the module.

Applications:

• Wireless IoT data transmission

• Home automation & smart devices

• Wireless sensor networks

• Remote serial device monitoring

• RS232/TTL to WiFi interface bridge

• Industrial control systems

• ESP/Arduino-based wireless control systems

• Remote debugging via serial port

Package Includes:

• 1 x RM04 UART to WiFi Serial Module