WM-Bus modules enable flexible sub-GHz metering
Quectel has announced the KCMCA6S series of Wireless M‑Bus (WM‑Bus) modules, capable of sub-1 GHz operation for smart metering. Based on Silicon Labs’ EFR32FG23 wireless SoC, featuring a 73‑MHz Arm Cortex‑M33 processor, the modules operate in the 868‑MHz, 433‑MHz, and 169‑MHz bands.
The devices comply with EN 13757‑4, the European standard for wireless metering, and support the WM‑Bus protocol and other proprietary sub‑GHz protocols. Their built-in software stack and flexible configuration modes eliminate the need for third-party protocol integration.
Modules include an optional integrated SAW filter to limit interference from cellular signals, an important factor for devices combining WM-Bus with cellular technologies such as NB-IoT or LTE Cat 1. They feature 32 KB of RAM and 256 KB of flash memory.
Availability for the KCMCA6S series was not provided at the time of this announcement.
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