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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 Invent...
...UART线如下：电脑端的串口工具软件非常之多，查看原文链接下载。请注意：使用串口工具软件之前，一般需要安装硬件厂商提供的驱动程序。
电脑端打开串口：
UART上指示灯会开启，说明串口已打开：
测试与BLE硬件通信（数...
完美解决phpcms批量移动内容后，新闻心情、评论排行等不更新的问题 - 更多...
...后台评论排行列表数据仍然还是原内容的数据，url却是空链接了（原url已删除了）。
原因：内容移动后，catid发生了变化，而comment、mood相关的表中catid没有更新。
解决方法：只需修改一个文件搞定 phpcms/modules/content/content.ph...
App Inventor 2 UrsPahoMqttClient 拓展 - 物联网轻量级MQTT协议 · App Inventor 2 中文网
... 建立连接，不做其他操作。boolean CleanSession 表示是否链接到先前中止的会话。
建立连接，当连接建立成功后将发送一次消息。boolean CleanSession 表示是否链接到先前中止的会话。WillTopic、WillQoS、WillRetain 和 Wi...
BBC micro:bit 平台 · App Inventor 2 中文网
... micro:bit 进行交互。micro:bit 扩展如下，每个扩展均有文档链接：
Microbit_Accelerometer - 访问 micro:bit 的板载加速度传感器。
Microbit_Button - 按下 micro:bit 的按钮时接收消息。
Microbit_Io_Pin - 配置 micro:bit 的板载引脚，从引脚读取模...
When would I use XML instead of SQL? [closed]
...n, where the user stores each project in it's own file. The app lives on a USB stick, and requires zero install. All the data is pulled from the XML and worked on in memory, so getRecord(id) is nuts fast.
So my answer would be.. when the data is small enough to be held in memory, a database is ove...
How do I remove files saying “old mode 100755 new mode 100644” from unstaged changes in Git?
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I moved some projects to an usb drive (fat32) and back again to my ubuntu machine (ext4) and ended up with a bunch of changed files, well, the attributes. git reset --hard HEAD worked perfectly for me. thanks
– cirovladimir
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Starting iPhone app development in Linux? [closed]
...u to find)
Xcode/iPhone development works perfectly, as does debugging via USB to the phone itself.
It actually surprised me a lot - but I've had no issues at all.
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How to change the URI (URL) for a remote Git repository?
I have a repo (origin) on a USB key that I cloned on my hard drive (local). I moved "origin" to a NAS and successfully tested cloning it from here.
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iOS Remote Debugging
...ile.de/blog/ios6-remote-debugging-web-inspector
Connect your iDevice via USB with your Mac
Open Safari on your Mac and activate the dev tools
On your iDevice: go to settings > safari > advanced and activate the web inspector
Go to any website with your iDevice
On your Mac: Open the developer...
App Inventor 2 社区精华问答 · App Inventor 2 中文网
...的基础知识、组件用法、技巧分享与常见错误解决。原帖链接见各文末。
基础知识
【科普】App Inventor 2 中的”2”是什么意思？
【科普】App Inventor 2 能编译出苹果iOS版App吗？
【科普】App Inventor 2 添加超...