User's Manual

USER MANUAL PREVIEW

PTM 535BZ – BLUETOOTH AND ZIGBEE GREEN POWER PUSHBUTTON TRANSMITTER

4.4 IEEE 802.15.4 MAC payload (ZGP telegram)

The IEEE 802.15.4 MAC payload contains the ZGP telegram data. Figure 25 below shows the

ZGP telegram format.

Figure 25 – ZGP telegram format

The content of the ZGP telegram data field depends on the telegram type (ZGP data telegram

or ZGP commissioning telegram). Some of the fields shown in Figure 25 above are not used

in all telegram types. These fields are marked in italics. The structure of data and commis-

sioning telegrams is described in the subsequent chapters.

4.4.1 Data telegram structure

By default, PTM 535BZ transmits data telegrams. The payload of data telegrams is either 13

byte (Device ID = 0x07, default) or 12 byte (all other supported Device ID) long.

Figure 26 below shows the telegram structure for ZGP data telegrams.

Figure 26 – Structure of ZGP data telegrams

ZGP data telegrams contain the following fields:

 Frame Control (1 byte)

The Frame Control field is set to 0x8C

 Extended Frame Control (1 byte)

The Extended Frame Control field is set to 0x30

 Source Address (4 byte)

The Source Address uniquely identifies the originator (sender) of ZGP telegrams. This

Source ID is assigned by Zigbee Alliance and cannot be changed by the user.

 Sequence Counter (4 byte)

The Sequence Counter is a continuously incrementing counter used for security pro-

cessing. It is initialized to 0 at the time of production and incremented for each tele-

gram (data telegram or commissioning telegram) sent. The least significant byte of

the Sequence Counter is used as Sequence Number in the IEEE 802.15.4 MAC Header.