ULM3 High-Precision UWB Positioning Module

DWM3000 module for UWB development

ULM3 uses the DWM3000 UWB module with a controller and onboard OLED display. It can act as an anchor or tag in the documented system. USB-to-serial and TTL UART provide a starting point for connecting a PC or embedded host without treating the radio chip interface as the application's data protocol.

Serial data and operating configuration

The manual specifies 115200 baud with 8 data bits, no parity and 1 stop bit for its serial output. Implement the documented mc frame parser for the installed firmware and verify units, IDs and complete frames before consuming measurements. Check the TTL electrical interface and pinout against the module manual.

At 850 kbps, the manual describes a 12 ms slot per configured tag and a 96 ms cycle for eight configured tag slots. This operating example is more useful for integration planning than assuming the maximum update rate applies to every tag count. Radio data rate, per-tag update interval and host latency are separate quantities.

Selecting compatible hardware

The listed 40 m maximum range is for open line of sight at 850 kbps. Installed performance depends on the tag, environment, geometry and settings. DWM3000 capabilities do not by themselves guarantee interoperability with a phone or another vendor's firmware. For supported range-and-angle measurement, compare the ULM3-PDOA anchor.

English and Chinese manuals are listed below. Use the module selection guide and deployment checks to define your evaluation.