The Wireless Meter-Bus (WM-Bus) communication protocol was developed to enable the wireless reading of gas and electricity meters, but is also applicable to any devices or things. Wireless M-Bus is a European Communication Standard based under EN 13757.
- Metering Bus has been established as the basis for new Advanced Metering Infrastructures installations (AMI), allowing the two way communication between meters and data concentrators.
- Wireless Meter Bus as such defines the wireless communication aspect of the interaction between meters and concentrators.
- WM-Bus uses ISM license-free bands in the EU in the Sub-1-GHz spectrum and has been adopted for several Smart Metering roll-outs already, positioning it as cost effective, standardised and attractive solution. It uses primarily 868 MHz with the 433 and 169 MHz bands added in 2013.