I wanted to read out my own water meter and get consumption information into Home Assistant, so I:

• Created a new PHY definition for EFR32MG13 which can receive Wireless M-BUS modes C and T simultaneously
• Created firmware to run this on the only subGHz USB dongle available from Silicon Labs
• Created an interface to allow sniffing packets and pushing those back over the USB serial port
• Forked wmbusmeters and added support for this dongle

This has been running stable on a Raspberry Pi for some years now.