M-Bus (Meter-Bus) is a European standard (EN 13757-2 physical and link layer, EN 13757-3 application layer) for the remote reading of gas, water, electricity, heat, or other utility meters. M-Bus is designed for communication on two wires, making it a cost-effective and efficient solution for connecting meters in a network.

The main features of M-Bus include:

    Two-Wire Connection: M-Bus uses a two-wire, twisted pair cable for communication, which can also provide power to the connected meters. This simplifies installation and reduces cabling costs.

    Multiple Devices: A single M-Bus network can support up to 250 metering devices, making it scalable for various applications.

    Low Power Consumption: M-Bus is designed for low power consumption, which is essential for battery-operated meters.

    Secure Data Transmission: The protocol supports encryption and other security measures to ensure the integrity and confidentiality of metering data.

    Flexibility: M-Bus can be used for various types of meters, including water, gas, electricity, and heat meters. It can also be integrated with other communication protocols for more complex systems.

M-Bus is widely used in Europe for utility metering and is gaining popularity in other regions for its simplicity and efficiency in remote meter reading applications.