抓包器能收到data request, 但是父节点并没有回复ack,这个抓包器就在父节点的旁边很近的位置,经常会出现这样的问题。求解
This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.