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MQTT支持获取设备端的在线状态吗? - 创客硬件开发 - 清泛IT社区,为创新赋能!

mqtt拓展支持获取设备端的在线状态吗?这里仅仅提供一个思路: 设备状态是设备的一项数据,这个也需要设备上报其状态数据给app端,类似网络的心跳包,定时上报状态数据,一定时间没取到数据就认为设备离线。
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HTML5 record audio to file

...derjs. Problem: file size is quite big, more upload bandwidth required. as mp3[ all code client-side, compressed recording], you can check out --> mp3Recorder. Problem: personally, I find the quality bad, also there is this licensing issue. as ogg [ client+ server(node.js) code, compressed record...
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How do I make JavaScript beep?

...://jsfiddle.net/7EAgz/ Conversion Tool And here is where you can convert mp3 or wav files into Data URI format: https://dopiaza.org/tools/datauri/index.php share | improve this answer | ...
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google mock分享(全网最全最好的gmock文档,没有之一) - C/C++ - 清泛网 ...

...个模块用于根据Query中的Segment接合业务处理的。Rank.h 头文件 #ifndef RANK_H_ #define RANK_H_ #include "IAPIProviderInterface.h" namespace seamless { class Rank { public: virtual ~Rank() {} public: void processQuery(IAPIProviderInterface* ...
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互联网医疗新格局:顶级医生入场 - 资讯 - 清泛网 - 专注C/C++及内核技术

...野。几天来,网易科技就发现了万峰心血管专家联盟、心在线(北京)科技有限公司、哈特瑞姆心律专科医生集团、心血管医生集团等多个“医生集团”。 这还只是在心血管领域,在其他领域,大大小小的医生集团不在少数。...
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内存管理内幕:动态分配的选择、折衷和实现 - C/C++ - 清泛网 - 专注C/C++及内核技术

...地址映射到物理的 RAM 或者 swap,它还可以将 它们映射到文件文件位置,这样,读写内存将对文件中的数据进行读写。不过,在这里,我们只关心 mmap 向进程添加被映射的内存的能力。 munmap() 所做的事情与 mmap() 相反。 如您...
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How much space can your BitBucket account have?

... expect that you are polite and respect fair use. If you push your entire MP3 collection that is not polite or respectful to the artists. (Just for the sake of completeness) share | improve this ...
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Python glob multiple filetypes

... For example, for *.mp3 and *.flac on multiple folders, you can do: mask = r'music/*/*.[mf][pl][3a]*' glob.glob(mask) The idea can be extended to more file extensions, but you have to check that the combinations won't match any other unwanted...
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携程违约合同现双版本 手机端消费者投诉被利诱 - 资讯 - 清泛网 - 专注C/C+...

...合同不作数。就在携程旅游这几天给会员广发红包,推广在线旅游的时候,消费者刘女士向大众证券报投诉携程APP存BUG,同一产品合同在网站和手机上不统一。刘女士在手机上购买的产品,违约金显示为30%,而当刘女士违约时,...
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How to play ringtone/alarm sound in Android

... You can push a MP3 file in your /sdcard folder using DDMS, restart the emulator, then open the Media application, browse to your MP3 file, long press on it and select "Use as phone ringtone". Error is gone! Edit: same trouble with notific...