This thing is useful for walk-by WM-Bus meter reading. Unlike some fancy professional tools, it shows you nicely which meters have been read already, and which are still pending.
You'll need this specific USB stick and a browser which supports Web Serial API. As of 2025, this really means "Chrome". On Android, you might need to click the "Activate WebUSB Polyfill", or you might be out of luck.
This tool performs no packer parsing/decoding, it simply produces a JSON log of all captured packets.
The log can be post-processed and fed to wmbusmeters for further decoding.