Metis-II Radio Module 868 MHz wMBus

By Würth Elektronik EISOS 68

Metis-II Radio Module 868 MHz wMBus

Wurth Electronics' wireless M-Bus standard (EN13757-4) specifies the communication between water, gas, heat, and electricity meters and concentrators. The standard comprises various operating modes to meet the requirements of one-way and two-way data communication in stationary and mobile systems.

The AMB8626-M is an all embedded low-cost wireless M-Bus radio module, which operates in 12 channels in the 868 MHz frequency band. The integrated protocol controls the entire data communication. Data packets are built and transmitted according to EN13757 part 4 specifications. Configuration of parameters is handled via the UART interface and a control pin. Measured field strength (RSSI value) offers the option of enhancing quality of the radio link.

The customized application layer can be fully integrated into the radio module, thus eliminating the need for an external host microcontroller. The radio module supports the AES-128 encryption standard. A very low-power mode ensures long battery lifetime.

The module is pre-certified for operation under the European radio regulations for license-free use. Due to its outstanding RF characteristics, the module achieves a range of up to 2,000 meters line of sight. The AMB8626-M is a surface-mounted module and is available on tape-and-reel for volume production.

Interfaces

The AMB8626-M is connected to a host system via the UART/SPI interface with a data rate of up to 115.2 kbps. When using appropriate firmware, the module is also suitable for autonomously recording digital or analog signals. Other pins can be used for data flow control and to switch between operating modes.

Range of Applications

The radio module is designed for automatic meter reading applications for wireless data transmission according to the Wireless M-Bus specification (EN13757-4). The radio module is designed to be integrated into meters, concentrators, and mobile metering devices. Other applications are conceivable. Its compact dimensions and low-power consumption make the radio module ideal for battery-powered devices.

Matching Products: AMB8465-M and AMB8665-M

Features
  • Low-cost radio high power module 868 MHz
  • Wireless M-Bus EN13757-4:2013 standard
  • Open metering system (OMS) supported
  • Range: up to 1,000 meters line of sight
  • RF output power: 14 dBm
  • Small form factor: 27.0 mm x 17.0 mm x 4.0 mm
  • Low-power functions (wake-on-radio)
  • Easy switching between operating modes: S, T, C
  • Adjustable RF data rates
  • Communication via UART/SPI interface
  • Encryption AES-128
  • Available on tape-and-reel for SMD mounting

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