

- “Lipstick” Size: Save Your Space
- Rich Protocols: MQTT/TCP/UDP/HTTP/DHCP/DNS
- Modbus Gateway: Modbus TCP/RTU conversion, Modbus RTU to JSON
- Easy Config: AT command, built-in webpage, config utility
- Edge computing: Up to 25 points
- User-defined Webpage: User can define the webpage style as need
Bidirectional Transparent Data Tata Transmission With serial device server, traditional serial devices can be connected to local networks and the Internet Then users can transform traditional serial device into loT device.


- Protocol Conversion: Modbus TCP/RTU Protocol conversion.
- Modbus Polling: Active querying and RTU/Json reporting.
- Multi-Host Polling: support multiple hosts to query simultaneously.




- Multi-user Access In TCP server mode, it suppports multiple TCP clients access, so it can realize multi-user control of serial devices.
- Multi-device Management The USR-DR132/134 device connects to the central server for centralized management of serial devices.
- Virtual-COM Software This feature can infinitely extend the serial cable,allowing communication to no longer be limited by distance.
- Point-to-Point Communication Using this method, it is possible to achieve data communication between two serial devices.


- Heartbeat Packet Server can detect abnormal disconnection from the client using this feature(DR3X as an TCP client).
- Registration Packet The server can identify different clients by using registration packets.
- 3 Practical Designs, Easy Your Installation.
- Ultra-small size like a lipstic, can be applied to various scenarios, especially the small box.
- Appearance patent No.202130367085.8.


- Push wire connector
- Pluggable wire connector
- Watchdog Protection Hardware & software dual watchdog to ensure stable operation.
- Auto Re-Connection Automatically monitor connection status, reconnect once disconnet.
- Wide Operating Temp -40℃ ~ 85℃, industrial grade design, stable operation in harsh environments.

