MDEV-868-PRC datasheet(12/55 Pages) LINX

12 / 55 page

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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 HumPRCTM Series modules can support up to hundreds of nodes,

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).

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 UDESTID0 register to activate

a specific Node in the network. This is a more advanced operation and

requires the microcontroller and custom firmware.

Administrator

Figure 20: HumPRCTM Series Transceiver Transmitter to Receiver Ratios

Administrator

Figure 21: HumPRCTM Series Transceiver Multiple TX and RX

MDEV-868-PRC Datasheet(PDF) 12 Page - Linx Technologies