RFU-900 (RS-232/RS485 to LoRa Radio Modem) User Manual
Version 1.0.0
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1. Introduction
The RFU-900 is a RS-232/RS-485 to radio device designed for remote communication operating
in a transparent way and exploiting the physical layer of LoRa (Long Range) transmission
technology.
The RFU-900 provides a maximum line of sight (LOS) transmission distance of 1000 meters (1
km) at an RF bit rate less than 1000 bps. In order to overcome the interference that may be
encountered in harsh environments, the RFU-900 allows the RF transmission bit rate to be
configured to a minimum of 250 bps, enhancing the capability of the modem to resist noise and
other interference. Additionally, the RF channels and Group IDs are adjustable, which is helpful
to avoid interference encountered when two RFU-900 networks are adjacent. The RF channels
and the Group IDs can be configured in order to distinguish and control the different RFU-900
networks.
