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Embedded low power radio modem with relay function

A Circuit Design product story
Edited by the Processingtalk editorial team Jun 2, 2005

Circuit Design, the leading supplier of narrowband radio modules, has updated the MU-1 low power radio modem launched last year with new relay and communication margin measurement functions

With the new relay function you can now achieve long distance communication (1 leg about 600 m) using a maximum of 10 relay stations, with the 10 mW output authorised for the European harmonised ISM 434 MHz license exempt band.

This enables a broader range of industrial applications such as data acquisition over wide areas and control of equipment placed in remote locations.

The MU-1 is a serial data communications modem designed to offer the reliability, shock resistance, vibration resistance and high quality required for use in industrial applications.

The MU-1 uses the UART serial interface to interface with the host system, while data input/output is performed with simple commands.

The new relay function is achieved by issuing these same dedicated commands from the source station.

Not only can you transmit and receive system data over a relay, you can also remotely set system channels from the source station.

In addition, we have added a new command for measuring the communication margin.

For example, you can remotely check the field strength (signal level and floor noise) of target stations in remote locations with commands from the source station.

In addition, we have provided a convenient command for measuring packet success rate.

Since you can easily check the status of each station, it is possible to devise a design that achieves optimum performance at the equipment design stage.

And because you can locate the equipment optimally for the radio wave environment, you can ensure more stable, reliable communication at the equipment installation stage too.

The MU-1 comes with flexible Link IDs that allow you to build 1:1, 1:N, and N:N systems so that combined with the relay function, it is possible to build anything from simple systems to complex systems optimised for a wide range of applications.

Operating at low voltage with a low consumption current, the MU-1 is ideal for battery operated applications.

In addition, it has an operating temperature range from -20 to 60C thanks to our unique temperature compensation circuit.

Wireless data rate: 9,600 bps.

Conforms to EN-300 220.

MU-1 single unit price Euro 225.

An RS232C interface kit, USB interface kit, and LAN interface kit are also available to support a variety of interfaces.

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