Commands doc: Device announce/004D, missing "rejoin information" detail

[tcharp38]

Can you please enhance the doc for "Device Announce" / "rejoin information"

• either with details
• or link/ref to proper chapter of Zigbee standard

Thanks

[pipiche38]

There are 2 Device Announce type:

1. which doesn't have LQI nor Rejoin value
2. which have a LQI and rejoin Flags

So for the same Message Type: 0x004D we have :

1. if len(MsgData) == 22 ==> No Join Flag
2. if len(MsgData) == 24 ==> Join Flag

When receiving a Device Announcement the Rejoin Flag can give us some information

• 0x00 if joined through association
• 0x01 if joined directly or used orphaning
• 0x02 if was network rejoin

My experience is as follow:

• 0x00 The device was not on the network. Most-likely it has been reset, and all Unbind, Bind , Report, must be redone
• 0x01 The device was on the Network, but change its route the device was not reset
• 0x02, 0x03 The device was on the network and coming back. Here we can assumed the device was not reset.

[tcharp38]

@pipiche38 How to interpret the "no rejoin info" case and do you know why I often see 2 consecutives device announce (first with rejoin 00, the 2nd without rejoin info) ? Thanks

[pipiche38]

These are my interpretation. May be @fairecasoimeme could correct/complet

There are 2 types of Device Annoucement the plugin can received from firmware >= 31a (1) Device Annoucement with a JoinFlags and LQI set to 00. This one could be issued from:

• device association (but transaction key not yet exchanged)
• Rejoin request (for an already paired devices )

(2) Device Annoucement with a valid LQI and not JoinFlag (shorter message)

• Real Device Annoucement on which the plugin should trigger a discovery (if unknown )
• Real Device Annoucement for Devices which do not send a Rejoin Request