Transmission Timeouts - Digi XBee-PRO S2C Zigbee User Manual

Transmission, addressing, and routing
Example 2: Send a ZDO network Address Request to discover the 16-bit address of
a remote
Looking at the Zigbee specification, the cluster ID for a network Address Request is 0x0000, and the
payload only requires the following:
[64-bit address] + [Request Type] + [Start Index]
This example sends a Network Address Request as a broadcast transmission to discover the 16-bit
address of the device with a 64-bit address of 0x0013A200 40401234. The request type and start
index are set to 0, and the transaction sequence number is set to 0x44.
API frame
7E 001F 11 01 00000000 0000FFFF FFFE 00 00 0000 0000 00 00 44 34124040 00A21300 00 00 33
Field composition
0x001F
0x11
0x01
0x00000000 0000FFFF 64-bit address for a broadcast transmission
0xFFFE
0x00
0x00
0x0000
0x0000
0x00
0x00
0x44
0x34124040 00A21300
00 00
0x33
Description
This API frame sends a broadcast ZDO Network Address Request to obtain the 16-bit address of a
device with a 64-bit address of 0x0013A200 40401234. We inserted the bytes for the 64-bit address in
little endian byte order. You must insert data for all multi-byte fields in the API payload of a ZDO
command in little endian byte order. You must set the AO command correctly on an API device to
enable the explicit API receive frames to receive the ZDO response.

Transmission timeouts

The Zigbee stack includes two kinds of transmission timeouts, depending on the nature of the
destination device. Destination devices such as routers with receivers always on use a unicast
XBee/XBee-PRO® S2C Zigbee® RF Module
length
Explicit transmit request
Frame ID (set to a non-zero value to enable the transmit status message,
or set to 0 to disable)
Set to this value for a broadcast transmission
Source endpoint
Destination endpoint
Cluster ID (Network Address Request)
Profile ID (Zigbee device profile)
Broadcast radius
Tx Options
Transaction sequence number
Required payload for Network Address Request command
Checksum (0xFF - SUM (all bytes after length))
Transmission timeouts
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