SN260 datasheet(68/88 Pages) STMICROELECTRONICS

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EmberZNet serial protocol

SN260

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7.3.8

Messaging frames

Table 100.

maximumPayloadLength

Name: maximumPayloadLength

ID: 0x33

Command parameters: None

Response parameters:

int8u apsLength

The maximum APS payload length.

int8u transportLength

The maximum transport payload length.

Table 101.

sendUnicast

Name: sendUnicast

ID: 0x34

Description:

Sends a unicast message as per the ZigBee specification. The message will arrive at its destination only if there is

a known route to the destination node. Setting the ENABLE_ROUTE_DISCOVERY option will cause a route to be

discovered if none is known. Setting the FORCE_ROUTE_DISCOVERY option will force route discovery. Routes to

end-device children of the local node are always known. Setting the APS_RETRY option will cause the message to

be retransmitted until either a matching acknowledgement is received or three transmissions have been made. The

ZigBee APS retry mechanism does not use sequence numbers. If multiple messages are sent to the same

destination at the same time any acknowledgement from that node will stop transmission of all outstanding

messages.

Note: Using the FORCE_ROUTE_DISCOVERY option will cause the first transmission to be consumed by a route

request as part of discovery, so the application payload of this packet will not reach its destination on the first

attempt. If you want the packet to reach its destination, the APS_RETRY option must be set so that another attempt

is made to transmit the message with its application payload after the route has been constructed.

Command parameters:

EmberNodeId destination

The node ID to which the message will be sent.

EmberApsFrame apsFrame

The APS frame for the message.

int8u messageTag

A value chosen by the Host. This value is used in the emberUnicastSent

response to refer to this message.

int8u messageLength

The length of the messageContents parameter in bytes.

int8u[] messageContents

The unicast message.

Response parameters:

EmberStatus status

An EmberStatus value indicating success or the reason for failure.

Table 102.

unicastSent

Name: unicastSent

ID: 0x35

Description:

A callback indicating the stack has completed sending a non-transport unicast message. Except for the status

value, the parameters are identical to those of the sendUnicast command used to send the message.

This frame is a response to the callback command.

Response parameters:

EmberNodeId destination

The node ID to which the message was be sent.

EmberApsFrame apsFrame

The APS frame for the message.

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