Description
The HI-LINK HLK-RM04 UART to Serial WiFi Ethernet Module is a versatile, low-cost embedded gateway module designed to bridge traditional serial devices to Ethernet and wireless local area networks. Powered by an advanced Ralink MIPS architecture with a built-in TCP/IP protocol stack, it seamlessly handles transparent bidirectional data conversion between UART serial interfaces, wired 10/100M Ethernet, and Wi-Fi networks without requiring any code changes on legacy hardware.
Equipped with 360MHz MIPS processing power, 16MB RAM, and 4MB Flash, the HLK-RM04 supports IEEE 802.11 b/g/n wireless standards and advanced security encryption (WEP, WAP-PSK, WAP2-PSK, AES). Operating reliably in industrial environments (-25°C to 75°C), it supports multiple working modes including AP, Station, TCP Server, TCP Client, and UDP. It features a user-friendly web configuration page and AT+ instruction sets, making it an ideal drop-in networking solution for industrial automation, remote monitoring, and IoT applications.
Note: Product images are for reference only; actual appearance, electronic component markings, or packaging may vary slightly based on manufacturing batches and component availability.
Key Features
- Multifunctional Network Conversion: Seamlessly bridges serial, Ethernet, and Wi-Fi interfaces with transparent bidirectional data transmission.
- High-Performance Ralink Core: Powered by a built-in 360MHz MIPS CPU paired with 16MB RAM and 4MB Flash for stable, long-run operation.
- Integrated 10/100M Ethernet Port: Built-in wired Ethernet networking port supporting high-speed local data transfer.
- Comprehensive Wireless Standards: Fully compatible with IEEE 802.11 b/g/n wireless networks supporting AP and Station simultaneous online modes.
- Advanced Network Security: Supports robust wireless encryption algorithms including WEP, WAP-PSK, WAP2-PSK, TKIP, and AES.
- Flexible Configuration: Accessible via user-friendly web configuration pages and an extensive AT+ instruction set for rapid deployment.
Benefits
- Legacy Hardware Integration: Instantly upgrades traditional serial devices with modern network and cloud connectivity without redesigning firmware.
- Flexible Network Topologies: Supports TCP Server, TCP Client, UDP, DHCP auto-IP allocation, and AP mode connectivity for smartphones and tablets.
- Industrial-Grade Durability: Engineered to function dependably across harsh operating temperature ranges from -25°C to 75°C.
- Global Brand Confidence: Hi-Link’s industry-standard engineering ensures dependable performance and regulatory peace of mind.
Applications
- Industrial Automation Gateways: Connecting PLCs, factory sensors, and industrial meters to enterprise Ethernet and wireless networks.
- Smart Remote Monitoring: Remote data acquisition, logging, and remote machinery management over Wi-Fi or wired lines.
- Commercial IoT Infrastructure: Smart retail kiosks, automated equipment, and security systems requiring reliable serial-to-network conversion.
- M2M (Machine-to-Machine) communication networks and wireless serial cable replacements.
Package Includes
- 1 x HLK-RM04 UART to Serial Wifi Ethernet Wifi Module
Specifications
| Parameter | Specification |
|---|---|
| Item Type | UART Serial to WiFi / Ethernet Embedded Module |
| Brand Name | HI-LINK (Hi-Link Electronics) |
| Model Number / Type | HLK-RM04 |
| Operating Voltage | 5 V DC |
| Processor & Memory | 360 MHz MIPS CPU, 16 MB RAM, 4 MB Flash |
| Wireless Standards | IEEE 802.11 b/g/n |
| Ethernet Interface | Integrated 10 / 100M Ethernet Port |
| Data Communication Speed | Up to 230.4 Kbps (Baud rate adjustable up to 320,400) |
| Working Modes | AP, Station, TCP Server, TCP Client, UDP |
| Security Protocols | WEP, WAP-PSK, WAP2-PSK, WAPI, TKIP, AES |
| Operating Temperature | -25°C to 75°C (Industrial Class) |
| Dimensions (L × W × H) | 80 mm × 50 mm × 18 mm |
| Shipping Weight | 0.06 kg |
| Shipping Dimensions | 8 × 5 × 3 cm |
