iU891A-XL: External antenna for an unique performance

iU891A-XL: External antenna for an unique performance

iU891A-XL: External antenna for an unique performance

The iU891A-XL is a compact and cost–effective USB stick based on the Long Range Radio Module iM891A-XL that operates in the unlicensed 868 MHz band. It supports all major unidirectional and bidirectional wireless M-Bus modes (S, C, T and combined C/T) with packet formats A and B as well as the OMS security modes 5 and 7. This USB stick adds wM-Bus connectivity to existing or new devices for data collection and transmission of sensors data. It is specially recommended for utility meters and smart meter gateways.
iU891A-XL: External antenna for an unique performance

Monitor wM-Bus Utility Meters with IMST USB Stick

The wmbusmeters open-source software enables seamless integration of wireless M-Bus utility meters with modern data platforms. Supporting iU891A-XL USB stick, this versatile solution reads meter data and exports it to MQTT, SQL databases, or plain log files.

The corresponding Home Assistant Add-on is a powerful tool for energy monitoring and smart home automation. Ideal for developers and enthusiasts, wmbusmeters offers flexibility, transparency, and control for efficient utility management.

The LorusWireless Windows application, developed by Ingenieurbüro Peter Gasperowicz, enables the iU891A-XL USB stick to receive wireless M-Bus data from devices such as heat cost allocators, water meters or heat meters.

Users can create a list of transmitter devices and assign the respective AES keys, which are necessary to decrypt and display encrypted data in a readable format. This application ensures seamless integration of meter data for monitoring and analysis, ideal for professional and personal use.

Wireless M-Bus Gateway stack

The Wireless M-Bus Gateway firmware has been design to allow remote monitoring and management of utility meters without the need for physical access to each individual meter.

The firmware collects data from the wireless M-Bus devices and for further processing and analysis in the corresponding central management system or database. It also provides additional functionalities such as data decryption (Mode 5 and 7), protocol conversion, and integration with other smart systems or IoT platforms.

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    Operating VoltageUSB (typ. 5 V)
    Operating Temperature-40°C to +85°C
    Dimensions (LxWxH)45,7 x 20,4 x 10,8 mm
    RF Output Power (max.)+21 dBm (EIRP)
Contact us today to discuss your needs Use the strengths of the IoT with IMST GmbH. Get in touch

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