Radicom Announces New RF Modem Module For Embedded Systems Applications

San Jose, CA -- Radicom Research, Inc. has added the low-cost WHM900 RF Modem Module to its Embedded Modem Module family. Utilizing frequency hopping spread spectrum (FHSS) technology, the WHM900 operates on the license-free 900 MHz ISM band to provide optimal range through obstacles and noise. The modem measures 1" by 1" by 0.3" in size, and can transmit data from 600 bps to 76.8K bps to distance up to 500' indoors and 1,500' outdoors with matching antenna. It operates across an industrial temperature range of -40 degrees C to +85 degrees C.

The easy-to-install WHM900 provides a standard serial TTL compatible interface. The user can use the AT Command set for selection of channels, output power, and different frequencies. No drivers are required. The modem requires a 3.3 volt power source and features low power consumption -- 36 mA (TX), 28 mA (RX) -- only 4 mA in low power down mode. The small size, combined with low power consumption, makes the WHM900 ideal for portable and battery powered embedded system applications.

Using Radicom's proprietary RadiLink protocol, the WHM900 can be conditioned to automatically maintain a connection. In the event of power outage, the modem will automatically attempt to reconnect when the power is restored. If the wireless data link is lost due to any other reasons, the WHM900 will detect the lost link and attempt to automatically re-establish the link forever.

Radicom WHM900 RF modems support Modbus-ASCII and Modbus-RTU networks without requiring special configurations. WHM900 includes addressing capabilities to provide for point-to-point and point-to multipoint networks. Its host interface baud rates ranging from 300 bps to 57600 bps and retry and acknowledgements of packets provides guaranteed delivery of critical packets in difficult environments.

The WHM900 RF Modem is pin-to-pin compatible to Radicom's dial-up Half-Inch Modems. With one layout of the system board, customers will be able to provide remote monitoring, data collection, and other types of communication applications with the ability to change between dial-up and wireless operation.

"The WHM900 RF Modem Module brings all the features our customers have been asking for in one small package," said Ming Hsieh, president of Radicom.

Source: Radicom