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APP INVENTOR硬件交互学习教程09——增加人机交互提示 - 创客硬件开发 - 清...
...弹窗，请先连接蓝牙
1.界面设计
增加activity 活动控件和对话框控件
2.逻辑设计
屏幕初始化增加蓝牙未启用逻辑；
断开按钮和闭合按钮，未连接蓝牙时逻辑处理
3.工程下载
大佬们，串口输出的文本字符怎么不能比较，也不能转换数字类型？ - App应用...
...能转换数字类型？你好，App Inventor 2 是弱语言类型，文本和数字之间不用刻意去转换，之间赋值就可以了：https://www.fun123.cn/reference/blocks/text.html#text2num
再次经过测试，你上面的步骤都能正常测试通过，方便的话，能否附上aia...
APP INVENTOR硬件交互学习教程11——滑条控制舵机 - 创客硬件开发 - 清泛IT...
这节我们通过滑条控件控制舵机动作。
1.界面设计
增加滑条控件和标签控件，滑条控制舵机动作，标签显示滑条数值。
2.逻辑设计
增加当滑条改变时，显示和发送指令给下位机
3.工程参考
【生成Python】AppInventor2中文网已支持代码块转换Python源码！ - App Inv...
...前瞻性。
咱作为“技术流派”，这么先进的设计理念和实用的功能，咱可不能忽视它，加之最近还有用户问AppInventor能否转Python代码，这不，这个功能不就来了嘛~~
先来个具体的例子，看看效果，写了一个生成3位水仙花数...
Convert bytes to a string
...ybe this will help somebody further: Sometimes you use byte array for e.x. TCP communication. If you want to convert byte array to string cutting off trailing '\x00' characters the following answer is not enough. Use b'example\x00\x00'.decode('utf-8').strip('\x00') then.
– Wook...
NodeJS - What does “socket hang up” actually mean?
...CloseListener (http.js:1526:9)
at Socket.emit (events.js:95:17)
at TCP.close (net.js:465:12)
Line http.js:1526:9points to the same socketCloseListener mentioned above by @Blender, particularly:
// This socket error fired before we started to
// receive a response. The error needs to
// fi...
jQuery.ajax handling continue responses: “success:” vs “.done”?
...et(url) {
return $.ajax({
url: url,
type: 'get',
dataType: 'json',
beforeSend: showLoadingImgFn
})
.always(function() {
// remove loading image maybe
})
.fail(function() {
// handle request failures
});
}
xhr_get('/index').done(function(data) {
// do stuff wi...
Share variables between files in Node.js?
...iler type as example, you'd need:
// File: config/environments/production.json
{
"mailerType": "SMTP",
"mailerConfig": {
"service": "Gmail",
....
}
and
// File: config/environments/test.json
{
"mailerType": "Stub",
"mailerConfig": {
"error": false
}
}
(mak...
What does “to stub” mean in programming?
...e, John Doe...etc.
API not ready? Make up a fake one by creating a static .json file containing fake data.
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Stock ticker symbol lookup API [closed]
... "exchDisp": "NASDAQ"
}
]
}
}
)
Which is JSON and very easy to work with.
Hush... don't tell anybody.
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