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App Inventor 2 低功耗蓝牙(BLE) 硬件接入、数据通信及IO控制 · App Inventor 2 中文网

...本文主要介绍一款较为通用、价格低廉的BLE设备从零开始如何利用App Inventor 2开发一款自己专属的手机蓝牙App应用。 BLE与经典蓝牙的区别可参考:《低功耗蓝牙(BLE) 和 经典蓝牙(SPP) 的区别》。 本文主要通过一款常见的BLE硬件...
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How to wait in bash for several subprocesses to finish and return exit code !=0 when any subprocess

How to wait in a bash script for several subprocesses spawned from that script to finish and return exit code !=0 when any of the subprocesses ends with code !=0 ? ...
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How to make MySQL handle UTF-8 properly

...d to the UTF-8 encoding described above." – Aaron McDaid Sep 30 '13 at 9:32 7 MySQL has never had...
https://www.tsingfun.com/it/cpp/1209.html 

MFC CString::Format()函数详解 - C/C++ - 清泛网 - 专注C/C++及内核技术

...%字符开始的格式指令,我们通过这些格式指令来编译器如何对Args里面的值进行格式!以下是不同类型数据的格式方式%号后的说明: (后面会举例说明各格式命令) d输出带符号十进制数 o输出无符号八进制数 x输出无符号十六...
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In MySQL, can I copy one row to insert into the same table?

... If it's null, it get automatically assigned the next AI number when it's inserted. – Grim... Dec 11 '13 at 11:08 3 ...
https://www.tsingfun.com/ilife/life/1829.html 

程序员保值的4个秘密 - 杂谈 - 清泛网 - 专注C/C++及内核技术

...易理解的,它是说我们要从用户的角度来思考这个产品该如何设计,因为产品好不好用最终由用户说了算。如果你在实现产品时也能站在用户的角度来思考,斤斤计较一个功能是否符合应用场景、是否与用户的行为特点吻合、是...
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一分钟读懂低功耗蓝牙(BLE) MTU交换数据包 - 创客硬件开发 - 清泛IT社区,...

...Z全面的数据及数据解析)         下载链接:        http://www.viewtool.com/index.php/22-2016-07-29-02-11-32/205-hollong-4-0-4-1-ble 4. MTU 请求(REQEUST)    完整数据(以下关注蓝色标注部分)   ...
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科大讯飞徐景明:从语音交互到人工智能 - 资讯 - 清泛网 - 专注C/C++及内核技术

...机器人也会逐步普及,每个人身上将有若干个智能终端,如何交互?一定将会以语音交互为主,其他交互为辅。”徐景明说。 像航空公司的呼叫中心,现在查询航班信息,打电话后还得按1、2、3,不行才跳转至人工座席,而且...
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How can I reverse a NSArray in Objective-C?

... For obtaining a reversed copy of an array, look at danielpunkass' solution using reverseObjectEnumerator. For reversing a mutable array, you can add the following category to your code: @implementation NSMutableArray (Reverse) - ...
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Redefine tab as 4 spaces

...ated by pressing the tab key, which would result in the file literally containing (up to) 4 space characters for each "tab" you type? Depending on your answer, one of the following sets of settings should work for you: For tab characters that appear 4-spaces-wide: set tabstop=4 If you're using...