User's Manual

USER MANUAL PREVIEW

PTM 535BZ – BLUETOOTH AND ZIGBEE GREEN POWER PUSHBUTTON TRANSMITTER

The receiver will identify the transmitter based on the IRK that is used to generate the hash

value from the prand value. When a transmitter is commissioned (learned in) to a receiver,

the transmitter therefore has to communicate its IRK to the receiver. The receiver maintains

a list of all IRK (one per transmitter) that have been commissioned.

To identify the originator of a message, the receiver will sequentially try all IRK from its list

until it finds a matching IRK that derives the hash value from the prand value. This IRK then

identifies the originator of the message.

Figure 13 below illustrates the address resolving scheme for resolvable private addresses.

For an example of resolving a resolvable private address, please refer to Appendix E.

Figure 13 – Resolving of resolvable private addresses

By default, PTM 535BZ uses SECURITY_KEY1 as IRK. It is possible to configure PTM 535BZ

via NFC to use SECURITY_KEY2 as IRK instead of SECURITY_KEY1 as described in Chapter

5.6.4.