Fragmentation in ZigBee znp.

Hi,thank you for your help.

I am trying to implement zigbee fragmentation.

I am using the command af_data_request_ext,af_data_store and af_data_retrieve.

I have two devices ,one coordinator and one a router both are with zigbee moudle (zigbee pro) with znp framework.

The router does:

1. Af_data_request_ext with null in data and the length of bytes.

2. Call af_ data_ store. As the number of times he needs to store all the data,the maximum he stores in one call is 240 bytes.

The coordinator does:

1. when he gets af_data_request_ext indication he starts to call af_data_retrieve  untill he gets all the data from the router,when he gets all the data he sends af_data_retrieve with len of zero so the router will free the memory he allocated.

This method work when call af_data_request _ext with len of less then 350.

When i try to do this method to sendfor example 500 bytes the coordinator is not recieving indication for af_data_request_ext.

Can you think of a reason why this is happening.

Thank you,uria.

2.6.3 A

Hi Uria,

Are you having issues with sending the fragmented packet or when retriving the frame in ZC?,  (does the fragmented packet for 500 bytes comes Over-The-Air?), if not, have you set MT_AF_EXEC_CNT accordingly to allow you to send multiple AF_DATA_STORE commands?, may be you can only send that small packet because of the buffer being expired.

What are the ouput logs you get from the serial? in the failing device?