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https://bbs.tsingfun.com/thread-2438-1-1.html 

Modbus硬件控制01——什么是Modbus - 创客硬件开发 - 清泛IT社区,为创新赋能!

...RTU协议设备必须要有RTU协议!这是Modbus协议上规定的,且默认模式必须是RTU,ASCII作为选项。(也就是说,一般的设备只有RTU这个协议,ASCII一般很少)所以说,一般学习Modbus协议,只需要了解RTU的协议,ASCII作为学习的了解就足...
https://bbs.tsingfun.com/thread-2442-1-1.html 

KIO4_Gradient 拓展:布局中的颜色渐变 - App Inventor 2 中文网 - 清泛IT...

...__________________________ 原版:合成颜色貌似有bug,alpha好像默认是0,设置了100,也是半透明的,设置255彻底成白色了。 暂时用拓展解决一下:https://community.appinventor.mi ... with-colors/56116/2
https://bbs.tsingfun.com/thread-2450-1-1.html 

标签内容过多,如何做到可上下滑动? - App应用开发 - 清泛IT社区,为创新赋能!

...在大模型App中,使用标签进行输出,这时可能内容较多,默认情况下,并不会出现滚动条,不能上下滑动,看不到上面已经隐藏的内容,那么该如何让其可滚动呢? 其实很简单: 垂直滚动布局就是为了解决区域显示不下...
https://bbs.tsingfun.com/thread-2473-1-1.html 

Modbus硬件控制02——modbus继电器 - 创客硬件开发 - 清泛IT社区,为创新赋能!

...过485通信口进行设置,且可通过产品上的按键进行重置为默认设置,即为9600波特率,8个数据位,偶校验,1个停止位。 二、模块功能 本模块具备一路数字输入和一路数字输出,还具备一个标准的 RS-485 通讯接口,通信使用MODB...
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Restoring state of TextView after screen rotation?

In my app I have TextView and EditText . Both have data in it. When the screen orientation changes the data in the EditText remains, but TextView data is cleared. ...
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How to change an Android app's name?

...application node in AndroidManifest.xml. Note: If you have added a Splash Screen and added <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> to your S...
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Twitter API returns error 215, Bad Authentication Data

...timeline.json'; // api call path $query = array( // query parameters 'screen_name' => 'twitterapi', 'count' => '5' ); $oauth = array( 'oauth_consumer_key' => $consumer_key, 'oauth_token' => $token, 'oauth_nonce' => (string)mt_rand(), // a stronger nonce is recomm...
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Best practices for Storyboard login screen, handling clearing of data upon logout

...on IOS8 but I get the following error when the app fires up and the login screen shows: "Unbalanced calls to begin/end appearance transitions". I have noticed that when the app loads the login screen shows, but also the first tab on the tab bar controller is getting loaded also. Confirmed this via ...
https://www.tsingfun.com/it/tech/1775.html 

Mysql ibdata 丢失或损坏如何通过frm&ibd 恢复数据 - 更多技术 - 清泛网 - ...

...可以。 二、大家的mysql数据库必须是按表存放数据的,默认不是,但是大家生产肯定是按分表设置的吧,如果不是,不好意思,这个方法不能恢复你的数据。my.ini的设置为 innodb_file_per_table = 1。 参考 http://blog.chinaunix.net/uid-241119...
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How do I change screen orientation in the Android emulator?

How do we change emulator screen orientation to landscape or portrait? 26 Answers 26 ...