System Operation - Linx HumPRC Series Data Manual

System Operation

Transmitters and receivers are paired using the built-in Join Process (see
the Join Process for details). One device is configured as an Administrator
and creates the network address and encryption key. When Nodes join,
the Administrator sends them the encryption key, network address and
their unique address within the network. The addressing method used by
the HumPRC Series modules can support up to hundreds of nodes,
TM
depending on the use model (duration of activations and how often they
are sent).
It is up to the designer to determine which device makes the most sense
as the Administrator in the final system, but there are some common
configurations. In a system with one transmitter and one receiver, it does
not matter which is the Administrator. In a system where one transmitter
is going to activate several receivers, the transmitter is normally the
Administrator (Figure 20 a). In a system with one receiver and multiple
transmitters, the receiver should be the Administrator (Figure 20 b).
Administrator
a
Figure 20: HumPRC TM Series Transceiver Transmitter to Receiver Ratios
A system with multiple transmitters and receivers can use any of the
devices as an Administrator (Figure 21 a) or may use a separate device
that is only used to join new devices to the network (Figure 21 b). Once all
system nodes have received the key and their address, the Administrator
node operates the same as any other node.
By default, the Administrator and all Nodes broadcast to the entire network.
All transmitters can activate all receivers in the network. An external
microcontroller can be used to change the
a specific Node in the network. This is a more advanced operation and
requires the microcontroller and custom firmware.
Administrator
b
UDESTID0 register to activate
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a
Figure 21: HumPRC Series Transceiver Multiple TX and RX
TM
Administrator
b
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