大约有 4,000 项符合查询结果(耗时:0.0300秒) [XML]

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...
https://bbs.tsingfun.com/thread-2625-1-1.html 

AppInventor写二进制文件 - App应用开发 - 清泛IT社区,为创新赋能!

默认情况下,文件组件都是处理文本的,不能直接处理二进制。 使用拓展可以写二进制文件:https://www.fun123.cn/reference/iot/bytearray.html 蓝牙等组件返回的字节列表(list),目前不能直接追加到拓展中,可以采用遍历字节列...
https://bbs.tsingfun.com/thread-2639-1-1.html 

【二进制】UrsAI2ByteArray 字节数组扩展:读写二进制数据,二进制文件读写...

...。HexPrefix属性指定在十六进制数字前面放置哪个字符串,默认设置为”0x”。可以使用以下方法插入和读取字符串:AddUTF8String、AddASCIIStringReadUTF8String、ReadASCIIStringReadUTF8StringUntil、ReadASCIIStringUntil UTF-8编码的字符串通常每个字符...
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Bootstrap: how do I change the width of the container?

...iner sizes // -------------------------------------------------- // Small screen / tablet @container-tablet: ((720px + @grid-gutter-width)); // Medium screen / desktop @container-desktop: ((940px + @grid-gutter-width)); // Large screen / wide desktop @container-lg-desktop: ...
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iPhone: Detecting user inactivity/idle time since last screen touch

Has anybody implemented a feature where if the user has not touched the screen for a certain time period, you take a certain action? I'm trying to figure out the best way to do that. ...
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How to get screen dimensions as pixels in Android

... top edge and m pixels from the right edge). Therefore I need to get the screen width and screen height and then set position: ...
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Why fragments, and when to use fragments instead of activities?

... is important information that I found on fragments: Historically each screen in an Android app was implemented as a separate Activity. This creates a challenge in passing information between screens because the Android Intent mechanism does not allow passing a reference type (i.e. object) direc...