Din Rail Tiny Size RS232 to Ethernet Converter Serial Device Server Modbus Gateway Modbus RTU to Modbus TCP Support Mqtt Edge Computing USR-DR132

Listing falsely states it supports MQTT. A newer model does, but the one shipped does not and can’t be upgraded via firmware to support it. Support will send you a link to another site to purchase the updated model.

Worked well, good instructions and the necessary software was easy to get and installed and worked correctly first time. It's tiny, just a bit wider than the Eth cable so doesn't take up much space.

I recently integrated the PUSR USR-DR134 "Lipstick" RS485 to Ethernet Serial Device Server into my industrial automation setup, and it's been performing exceptionally well. Despite its compact size—comparable to a lipstick tube—it offers robust functionality. The device facilitates seamless two-way transparent data transmission between RS485 serial ports and Ethernet, supporting protocols like MQTT, TCP, UDP, and HTTP. Its Modbus gateway capability allows for easy conversion between Modbus RTU and Modbus TCP protocols, simplifying communication with PLCs and SCADA systems. Installation was straightforward, thanks to the DIN rail mounting and push-type connectors. Operating reliably in various environments, this converter has proven to be a reliable solution for integrating serial devices into an Ethernet network