system reset problem

Do you enable security in your ZED? If yes, the reboot might be caused by security.

No i do not enable the security function.

when I enable or disable this function,

the phenomenon is same

when I enbale the security function

The Voltage is lower than the function disabled.

I want to know this time what  things has the stack done?

Thank you YiKai Chen 

After beacon request, it should be associated request followed. So, what is your problem? The end device keep rebooting? Do you check your battery? If you use power supply, does it keep rebooting?

yes you are right,

If i do not use the battery to power this circuit board, the phenomenon can be happened.

because the battery can not provide so large current, my board has a PA on it.

So the voltage of the battery will be polled down

my understanding is that when the ZED has sent the announce frame, indicate that the ZED has joined the network successfully.

and I don't why the next of  the step happened?

Is it polling? I think your should enlarge your battery capacity if you use PA. What is your battery spec? How many mAh?

thank you first.

why the Data Request frame need much more current consumpution than other wireless data frame?

can you explain me in detial?

thank you again!

I am not sure that is polling. I just guess because it should be polling after a ZED joins network. The reset problem should be the capacity of battery. What is you battery model and capacity?