It uses a three-packet handshake in which both the sender and receiver agree that they are ready to communicate.
它使用三次握手机制保证通信双方都准备好进行通信。
2
If the receiver of a MakeConnection does not have messages ready to be sent to the initiator of that connection, then an empty response should be sent back.
如果MakeConnection接收者没有要发送到该连接的发起者的消息，则应该发回一个空响应。
3
Push the button on your wireless transmitter once to arm the bear receiver. You will hear a few faint beeps. Now the unit is armed and ready for use.