Z-Stack Lighting and Frequency Agility

Sjef de Krijger said:

I'm looking to improve network reliability by using the frequency agility feature of Zigbee PRO. I've read a description of it in the Z-Stack Developer Guide - though it's not mentioned specifically in the Z-Stack Lighting guide. Does this mean that with ZLL, this feature shouldn't / can't be implemented?

On the contrary, ZLL is the only profile that mandates the support of frequency agility. In all other profiles it is not mandated and so can only be used in a closed system where all manufactures agree to implement it. Sorry it is not mentioned in the developers guide, it is a key feature of ZLL and Z-Stack-Lighting.

Sjef de Krijger said:

What I tried so far is enabling NWK_MANAGER on the SampleBridge and after creating a network, use the Mgmt_NWK_Update_req to change the MGR_ADDRESS to 0x0001 (bridge's address). I used SmartRF studio and an EB to cause interference, but I couldn't get the network to change channels.

Question is, is there a proper way to test this feature (assuming it can be used with ZLL at all)

You should not need to do anything special other than sending Mgmt_NWK_Update_req  API. Below is the ZTool (js) code I used to test this feature:

function ZDOMGmtNwkUpdateReq(DstAddrMode : ZDO_MGMT_NWK_UPDATE_REQUEST.ADDRESS_MODE, ChannelMask : ZDO_MGMT_NWK_UPDATE_REQUEST.ZIGBEE_CHANNELS, ScanDuration : Byte, ScanCount : Byte)
// send a ZDO_MGMT_NWK_UPDATE_REQUEST message
{
var req : ZDO_MGMT_NWK_UPDATE_REQUEST = new ZDO_MGMT_NWK_UPDATE_REQUEST ();
req.DstAddr = DestAddr;
req.DstAddrMode = DstAddrMode;
req.ChannelMask = ChannelMask;
req.ScanDuration = ScanDuration;
req.ScanCount = ScanCount;

// req.NwkManagerAddr = NwkManagerAddr ;
// display log messages
ZEngine.WriteLog("sending ZDO_MGMT_NWK_UPDATE_REQUEST to " + zportName); 
ZEngine.Send(zportName, req);
} 
} // end MyClass

...

ZDOMGmtNwkUpdateReq(0x0f, /*0x00100000*/ 0x00000800 , 0xFE , 0x0); //Move to channel 11

Regards, TC.