i found that end device often retransmission data,i don't know what causes this problem.
this distance between the end device and its parent is very close.and i use the sniffer to catch the packet and the rssi of the packet are all larger than -30dbm.
but the the retransmission phenomenon is quite obvious;
the screenshots is shown as follow
what can i do to solve or inprove this phenomenon?
hoping your advice whether right or wrong?
I see there is ACK to your ED so the retransmission should be caused by your application. How do you send out a packet? Trigger by a button or send out periodically?
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In reply to YiKai Chen:
i send the periodically,without aps acknowledgement;
In reply to liangliang lou:
Can you show me your SYSTEM_HEARTBEAT_EVT?
You do not return with event^ SYSTEM_HEARTBEAT_EVT in your if statement. It should looks like:
if (event & SYSTEM_HEARTBEAT_EVT)
return (event^ SYSTEM_HEARTBEAT_EVT);
Add return to see if it solves your problem.
dear YiKai Chen,
I have a try,and the related result is waiting for;
but i feel confused that i use below code in function void zb_HandleOsalEvent( uint16 event ),
and the funtion zb_HandleOsalEvent() is called shown as follow
at the end ,variable enents will set 0 return.
so in my opinion，it is not need to clean the SYSTEM_HEARTBEAT_EVT!
now the result is that this phenomenon is solved perfectly.
can you explain to me?
thank you !
i am so sorry to tell you
i found the problem is also exist,i found the end device will retransmission sometimes,but the problem is improved!
If you don not use event^ SYSTEM_HEARTBEAT_EVT to exclude the bit of SYSTEM_HEARTBEAT_EVT, it will keeps there and enter the "if statement" always every time your zb_HandleOsalEvent is called. You can not just use return 0 since you have process the event. You need to clear the bit.
What is the value of SYSTEM_HEARTBEAT_PERIOD? Do you set it very short?
the value i set is equal to 60 seconds,this mean that the heartbeat frame is reported every minute to the coordiantor
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