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1、otadongle是作为server存在的,另一个为client,二者之间实现zigbee通信(802.15.4)。根据通信协议可知,otadongle首先发送 Image Notify(可选)给client,client接收到通知后会发送请求信息(Query Next Image Request),然后等待otadongle的响应(Query Next Image Response),一旦响应后面就是数据传输了。