How to get the extended pan ID at the application layer, when a router joins into a new network with zstack (zigbee pro), ?

Extended PAN ID is used for joining a specific zigbee network and is specified by manufacture. If you don't have Extended PAN ID specified on your zigbee device, it will choose any one proper to join. However, the Extend PAN ID won't be changed on your zigbee device.

hi,yikai

I agree with you about  " it will choose any one proper to join".

And after the router joined into the network, how could I get the extended PAN ID in the router code ?

My application needs the  value of extended PAN ID .

Thank you!

As I said in my previous post, extended PAN ID is pre-programmed on zgApsUseExtendedPANID of your device. This value won't change no matter the device joins any zigbee network.

hi,

I am sorry I haven't described it correctly.

Because the router can join into different networks setup by different coordinators,

when network "A", the ext_pan_id may be "a",

when network "B",   the ext_pan_id may be "b" ,

and "C" , and "D" .....

And my application code on the router wants to get the value  ,such as "a"  ,"b" , or "c" .

How can I access it ?

If you don't specify Extended PAN ID in your device, there would be no Extended PAN ID return in the NLME_beaconInd_t parameter of ZDO_beaconNotifyIndCB. You can only know which PAN ID the device joins.