大约有 10,000 项符合查询结果(耗时:0.0151秒) [XML]

https://bbs.tsingfun.com/thread-1621-1-1.html 

Arduino控制RGB三色LED灯实验、程序代码、连线图、仿真 - 创客硬件开发 - ...

...含红绿蓝三种,通过控制红(R)、绿(B)、蓝(G)三种颜色变化使其相互叠加产生花式颜色。而其颜色值输出是通过PWM来控制。RGB三基色按照不同比例相加合成混色称为相加混色,除相加混色法之外还有相减混色法。 PWM控...
https://bbs.tsingfun.com/thread-1763-1-1.html 

AppInventor2添加超过10个屏幕会怎样? - App Inventor 2 中文网 - 清泛IT...

...加更多屏幕,但最好也不要添加太多屏幕,因为多个屏幕应用程序将非常消耗计算资源,并且很容易超出 App Inventor 限制。根据经验,任何单个应用程序中屏幕不应超过 10 个,当你尝试超过此限制时,App Inventor 会警告你...
https://www.fun123.cn/reference/iot/MQTT.html 

App Inventor 2 UrsPahoMqttClient 拓展 - 物联网轻量级MQTT协议 · App Inventor 2 中文网

...消息队列遥测传输) MQTT 发明于 1999 年,为物联网设计轻量级协议,基于TCP协议实现。 MQTT协议文档:https://mqtt.org/ MQTT服务质量(QoS):3个等级 QoS0:最低质量等级,最多发送一次消息,在消息发出后,接收者不会发...
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TCPServer TCP服务器扩展:在Android设备上创建TCP服务器 · App Inventor 2 中文网

... 已连接客户端数 ConnectedClients 返回当前已连接客户端数量。 回车换行延迟 CrLfDelay 数据传输和行终止符之间延迟时间(毫秒)。默认值:200ms。 忽略测试字符 IgnoreTestChar TestConnection 期间要忽略字符代码。...
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App Inventor 2 接入百度网盘API · App Inventor 2 中文网

...用Web浏览框】 3、获取文件列表,返回JSON,拿出想要文件fsid 【使用Web客户端】 4、获取文件信息,返回JSON,根据fsid取出dlink 【使用Web客户端】 5、根据dlink下载 【Web客户端】 6、下载效果展示 App In...
https://www.fun123.cn/reference/iot/spp.html 

App Inventor 2 经典蓝牙(SPP) 硬件接入:hc05 · App Inventor 2 中文网

... HC05 简单介绍 它有六个引脚,引脚作用如下: 通过厂商App连接串口测试,发现HC-05模块是经典蓝牙2.0,并不支持蓝牙5.0(低功耗BLE),它需要配对码进行配对,App Inventor 2 中使用“蓝牙客户端”组件,...
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querySelector, wildcard element match?

...electorAll('[tagName$="_Sequence"]') I didn't say it would be pretty :) PS: I would recommend to use tag_name over tagName, so you do not run into interferences when reading 'computer generated', implicit DOM attributes. ...
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How to fight tons of unresolved variables warning in Webstorm?

...ons for: Unresolved Javascript function Unresolved Javascript variable ps. this will remove the warnings on the IDE, but I don't think that is the best idea, because we will lost one of the best utilities in a IDE like Webstorm, which can worsen the quality of our code. Even so, if you want to ...
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Centering a div block without the width

... Update 27 Feb 2015: My original answer keeps getting voted up, but now I normally use @bobince's approach instead. .child { /* This is the item to center... */ display: inline-block; } .parent { /* ...and this is its parent container. */ text-align: center; } ...
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How can I run PowerShell with the .NET 4 runtime?

...To update just the ISE to use .NET 4.0, you can change the configuration ($psHome\powershell_ise.exe.config) file to have a chunk like this: <?xml version="1.0" encoding="utf-8"?> <configuration> <startup> <supportedRuntime version="v4.0.30319" /> </startup&...