Setting channel mask for quietest channel selection

[mikomarrache]

Hi,

We would like to be able to set a channel mask before forming the network so that the quietest channel will be selected (in case no channel is set before starting the network manager).

There is a field channels in the Ember network parameters, but I guess it hasn't been intended for this use, am I right?

com.zsmartsystems.zigbee/com.zsmartsystems.zigbee.dongle.ember/src/main/java/com/zsmartsystems/zigbee/dongle/ember/ezsp/structure/EmberNetworkParameters.java

Line 84 in 4d678e6

private int channels;

Would it be possible to use it for this purpose?

Thanks,
Mickael

[triller-telekom]

For Ember and Telegesis chips, this is already implemented: See

com.zsmartsystems.zigbee/com.zsmartsystems.zigbee.dongle.ember/src/main/java/com/zsmartsystems/zigbee/dongle/ember/internal/EmberNetworkInitialisation.java

Lines 143 to 145 in 4d678e6

	if (networkParameters.getRadioChannel() == ZigBeeChannel.UNKNOWN.getChannel()) {
	networkParameters.setRadioChannel(quietestChannel);
	}

and

com.zsmartsystems.zigbee/com.zsmartsystems.zigbee.dongle.telegesis/src/main/java/com/zsmartsystems/zigbee/dongle/telegesis/ZigBeeDongleTelegesis.java

Lines 871 to 876 in 4d678e6

	public ZigBeeStatus setZigBeeChannel(ZigBeeChannel channel) {
	if (channel == ZigBeeChannel.UNKNOWN) {
	// do an energy scan
	ZigBeeChannel quietestChannel = findQuietestChannel();
	if (quietestChannel != ZigBeeChannel.UNKNOWN) {
	radioChannel = quietestChannel;

Just pass the UNKNOWN channel when creating the network.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[tejas-n]

@triller-telekom But I don't think you can set a custom channel mask, right? For eg: if I wanted the library to just scan channels 11, 14, 15, 19, 20, 24, and 25, is there a way to do that?
Another closely related question that I have is should would the library automatically scan and select the appropriate channel if the co-ordinator reboots and starts the network again with startup(false)?

Is #958 related to these questions?

[triller-telekom]

But I don't think you can set a custom channel mask, right? For eg: if I wanted the library to just scan channels 11, 14, 15, 19, 20, 24, and 25,

Correct.

is there a way to do that?

No, this hasn't been implemented yet. Feel free to come up with a PR :-)

Another closely related question that I have is should would the library automatically scan and select the appropriate channel if the co-ordinator reboots and starts the network again with startup(false)?

No.

Is #958 related to these questions?

Yes.

[tejas-n]

Thanks, @triller-telekom. I can give it a shot in my free time, I'll ask for further details on the other ticket 😄