User's Manual

Primary Node
The primary nodes make up the primary network. This node is able to receive and decode signals
from the Avlite wireless remote controller, another primary node or a reserve node and act upon the
signal itself. The primary node is able to pass on the received signal to other lights within range. 4.1
Node Information AvMesh® RF Communications Systems Installation & Service Manual Latest
products and information available at www.avlite.com 21
Reserve Nodes
The reserve nodes make up the reserve network. This type of node is able to receive and decode
signals from either the Avlite wireless remote controller, a primary node or another reserve node
and act upon the signal itself. The reserve node is also able to pass on the received signal to other
lights within range.
Listen only Lights
A light is configured as listen only upon first start-up. Listen only lights receive and decode signals
from either the Avlite wireless remote controller, a primary node or a reserve node and acts upon
the signal itself. However, listen only lights are not able to pass on signals to other lights.
From the above descriptions, the primary and reserve nodes are, in essence, repeaters as they
repeat the received signals to all the other lights within range. This includes all light groups, not just
the light groups they belong to. The light groups they do not belong to will simply pass the signal on
to the surrounding lights within range and will not act upon the signal. Primary and reserve nodes
are therefore required to behave as both a transmitter and receiver
2.0 AV-RFM-01 Theory of Operation
The AV-RM-01 is a 2.4GHz wireless communication module which interfaces to a host MCU through
a serial UART to act as a wireless serial communications interface. The circuit of the device is
composed of a Nordic nRF52833 multiprotocol SoC combined with an nRF21540 front-end module
to boost the transmit power for longer operational range. The module operates using an 802.15.4
propriety protocol.
The radio RF signal from the Nordic nRF21540 front-end module is passed to a U.FL connector for
connection to an external antenna. The antenna used during compliance testing is a TE connectivity
2118059-1 flat patch PCB antenna with a peak gain of +4dBi. To ensure RF signal integrity, the
ground is common to all circuit elements and connected to the host device ground through the
interface connectors.