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你好，
1.CC2530基于锁的例程，协调器一上电，
节点就自动加入网络了，如果想协调器上电后，
节点不自动加入网络，必须协调器和节点两边都按下按键后，
节点才能加入网络并进入EZmode，请问这该怎么实现？
2.我们的应用场景为一个教室内，协调器和节点都在一个教室内，
请问这样的环境下协调器是否要选用带PA的模块？
