User Guide: RFM5109-B Fixed RAIN/UHF Smart Reader with ReaderService
Page 5
www.Axzon.com IN026F12
3. Using the System
3.1. Identifying and Organizing Sensors
Sensors are typically identified by their EPC or
TID numbers. The RFM5144 ReaderService alpha
release is able to read EPCs only. The specific
value written into the EPC memory area is used
to identify individual sensors.
3.2. Sensor Handling and Placement
Axzon sensors can be touched with no worry
about affecting their operation.
The RFM3250 temperature sensors are construct-
ed with rugged materials designed to operate in
harsh environments. In normal use, the RFM3250
protective backing is peeled from the sensor’s
adhesive layer before affixing it to a motor or
pump for example.
Epoxy mounting of the RFM3250 sensors is allow-
able. Please see
AN009 RFM3250 Epoxy Recom-
mendations
for more information.
3.3. Software overview
RFM5109 Fixed reader is operated using the
RFM5144 ReaderService software. This software
includes a complete REST interface, an integrat-
ed MySQL database, and support for streaming
data modes. The RFM5144 ReaderService uses
the RFM5140 RfmApi interface to manage low-
er-level sensor configuration and raw sensor
data. The RFM5140 RfmApi converts raw sensor
data into trusted data for the RFM5144 Reader-
Service to store and process.
Several example programs using the ReaderSer-
vice are provided.
3.4. Maximum Read Range
The maximum read range for the RFM3250 is
approximately 5 to 7.5 meters in a free air envi-
ronment depending on the antenna used. Near
complex mechanical structures, the read range
can be reduced to 2-3 meters. Please see the
respective sensor product brochure for additional
details on each sensor’s performance.
Metal enclosures tend to reflect the RF signal
throughout the enclosure. It is possible for
these reflected signals to combine to create
nulls or shadows, where the RF signal cancels
itself. These nulls are usually only a few inches
or centimeters wide. Moving sensors or antennas
in any direction will often correct for any weak
signal strength issues.
