Manual

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3.4. Modem
- Modem is the central controller of the system. It must always
be powered when the Navigation System is working. It is
recommended to use an active USB hub for that purpose or
even a regular cellular phone USB power supply. A USB
power bank can also be used
- The modem is also used to set up the system, monitor it, and
interact with the Dashboard
- It can be placed anywhere within radio coverage for
permanent radio connection with all beacons—usually in the
radius of up to 100 meters with antennas from the Starter Set
- Radio coverage further extended to a few hundred meters by
using a lower bitrate of 38kbps and full-size (165mm for a 433
and 915MHz band) antennas, which have been tested to
provide up to 400m in ideal conditions
- There are 433MHz (only for HW v4.9, out of production, get bug-fixing SW update
only) and 915MHz versions available
- A proprietary radio protocol used for communication and synchronization between
modem and beacons
Fig.1: HW v5.1 Modem as
an example