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请教几个问题：
1. 是的, 每个都有全球唯一的地址.
2. 可以, 通过smartRF flash programmer可以修改, 改成secondary的地址, 存放在flash里面.
3. 可以做成无按钮. 你可以做成一上电就开始广播, 并且一断开连接就广播. 为了省电, 你可以先用高频率的广播一段时间(短时间间隔), 然后再降低到低频率的广播(长时间间隔).
