It is supported according to the documentation. You may need to add it manually. Be sure to configure EXTRA_JAVA_OPTS for the serial port.
If you are running on Linux, then you probably need to add the user ‘openhab’ to the tty group, and enable EXTRA_JAVA_OPTS for the serial port your coordinator uses
Yes, it is possible to have multiple gateways on the same channel. You can have multiple networks on the same channel also if that’s what you mean. You can only have one coordinator per network though.
Devices can only be paired to a single network. If the multiple gateways are on the same network, then of course they will work together. If they are on different networks, then it is not possible.
Yes, you can. In general it should be fine, but the more traffic you have, the more possibility there is of interference.
Are these gateways different networks? If so, it’s probably best to try and operate on different channels in general as it will limit the possibility of any interference. If you can’t do that, then probably it’s still fine - so long as you don’t have “lots” of networks operating.
actually, I could manually add the stick but it shows UNINITIALIZED
CC2531EMK Coordinator
TI CC2531EMK USB Stick
Status: UNINITIALIZED
Also I would then think, once initialised, it would find devices (Philips and Xiaomi etc)
But perhaps I am too optimistic
@chris : sorry for asking. What is Zigbee the network concept? How do I find the network on which, say, my Philips hue and my TI cc2531 USB Stick operate?
Normally you can do a search if you are writing some software to do this, but it’s normally done automatically as part of the join process so you don’t normally do such a search.
Yes, of course. The same as a wifi channel and a wifi network are different. You can have multiple logical networks on a channel.
You can do a scan for networks, but you can’t find out what devices are on the network. You can only find out information about devices after you join the network.
Thanks for kind and patient expert replies
Fair enough, but I seem to have a little problem, my cc2531 is on channel 11 but I get
# whsniff -c 11
ERROR: No working device found.
even if openhab sees it as a Hue emulator (and zigbee2mqtt sees it as well)
Sorry - I don’t know what this is - what is whsniff?
I’m not familiar at all with the cc2531 or whatever CLI you are using. If this is just sniffing traffic on the channel though, then it is unlikely to help as all ZigBee traffic is encrypted and it’s not possible to get the keys until you join the network.
Sorry Chris to bring in unfamiliar things. It’s all yet unfamiliar for me.
In IP, a network is identified by its address and mask
say a.b.c.0/24 (IPv4) or a:b:c:d::/64 (IPv6)
so: I wonder, in Zigbee, how a network is identified.
(and how to join it like giving or acquiring correct address in range)
I am not familiar with zigbee2mqtt - I use completely different tools.
This isn’t really a network - that’s just a subnet mask and addressing scheme.
With IP, a network could be a Windows network, or a WiFi network etc. When you join a network, you will normally communicate with a trust centre (eg a Windows or Linux server) and you will exchange credentials and receive a network address and the keys so that you can communicate with other devices on the network.
ZigBee is the same.
This is not super simple - joining ZigBee networks is quite complex, and if you are trying to sniff a network, then as I said earlier it is unlikely to work unless you know the network key in use for that network. This is not simple to find.
To join a network, a device will perform a scan and will communicate with the trust centre once joining is enabled. If the trust centre accepts the join request (if the joining device has the right credentials) then it will be told the network key which is transferred using a different key called a link key. There are different types of link key in use - normally HA uses a standard key, but ZB3 defines a higher security model which makes it almost impossible to crack the keys.
Sounds good.
In Zigbee2mqtt it is said to factory reset a Hue lamp for example to make it join the cc2531 trust centre. But then, I guess, it will no longer be part of the Philips Hue trust centre gateway network, Or will it?
To say it otherwise, can one have more than one trust centre per network?
