大约有 3,900 项符合查询结果(耗时:0.0176秒) [XML]
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...
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
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...
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...
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...
【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...
Disable hover effects on mobile browsers
... When it's being visited from a desktop, I want the clickable areas of the screen to light up with :hover effects (different background color, etc.) With a tablet, there's no mouse, so I don't want any hover effects.
...
Regular expression for letters, numbers and - _
... snippet to show how you can use this pattern:
<?php
$arr = array(
'screen123.css',
'screen-new-file.css',
'screen_new.js',
'screen new file.css'
);
foreach ($arr as $s) {
if (preg_match('/^[\w.-]*$/', $s)) {
print "$s is a match\n";
} else {
print "$s is NO match!!!\n";
...
How do I get the height and width of the Android Navigation Bar programmatically?
The black navigation bar on the bottom of the screen is not easily removable in Android. It has been part of Android since 3.0 as a replacement for hardware buttons. Here is a picture:
...
Can I avoid the native fullscreen video player with HTML5 on iPhone or android?
... an iPhone or a DroidX, the native video player pops up and takes over the screen, thus obscuring the other dynamic content that I want to display simultaneously with the video.
...
