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App Inventor 2 低功耗蓝牙(BLE) 硬件接入、数据通信及IO控制 · App Inventor 2 中文网
...机设备
从机，从机只能广播并等待主机的连接。例如智能手环，是作为BLE的从机设备（以上的数据透传演示BLE硬件就是作为从机的）
IO口控制
可以使用厂商提供的App进行IO口控制，也可以使用App Invent...
LEGO EV3 机器人按键控制 · App Inventor 2 中文网
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开发平台：MIT App Inventor
目标设备：Android智能手机
通信协议：Bluetooth Classic
硬件要求：LEGO Mindstorms EV3
最小系统版本：Android 4.4+（蓝牙支持）
扩展建议
功能增强
传感器...
Is ASCII code 7-bit or 8-bit?
My teacher told me ASCII is 8-bit character coding scheme. But it is defined only for 0-127 codes which means it can be fit into 7-bits. So can't it be argued that ASCII bit is actually 7-bit code?
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pypi UserWarning: Unknown distribution option: 'install_requires'
...ed Nov 28 '11 at 15:38
Fredrik HåårdFredrik Håård
2,4622020 silver badges3232 bronze badges
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Get random item from array [duplicate]
...swered Dec 23 '13 at 10:54
Naâmèn Mohamed AmineNaâmèn Mohamed Amine
18911 silver badge33 bronze badges
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Extract subset of key-value pairs from Python dictionary object?
...works in 2.7 too):
{k: bigdict[k] for k in ('l', 'm', 'n')}
Update: As Håvard S points out, I'm assuming that you know the keys are going to be in the dictionary - see his answer if you aren't able to make that assumption. Alternatively, as timbo points out in the comments, if you want a key tha...
Coding in Other (Spoken) Languages
...nnish names, there's a similar dilemma about whether to use special chars (äöå) or replace them with a & o (and if you do use them, you're likely running into charset problems). But yeah, fortunately I haven't had to use Finnish in code for at least 7 years. :)
– Jonik
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OfflineSpeech 拓展：离线语音识别 · App Inventor 2 中文网
...留两位小数。逐词含 conf 置信度，低于 0.6 的词可以做「人工复核」标记。
模型怎么来：默认下载 / 换地址 / 手动放入
识别前必须有一个 Vosk 模型。三条路线按省事程度排序：
路线
适用
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Compression/Decompression string with C#
... only for UTF8-based things. If you add in, say, Swedish characters like åäö to the string value you're serialize/deserializing it will fail a round-trip test :/
– bc3tech
Aug 21 '19 at 12:32
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FloatingActionButton 扩展：悬浮操作按钮扩展，可自定义颜色、大小、位置...
...屏幕
4. 滚动时隐藏/显示
实现滚动时智能隐藏按钮：
当 ScrollArrangement1.滚动
如果 ScrollArrangement1.当前Y坐标 > 100 则
调用 FloatingActionButton1.HideFAB 隐藏按钮
否则
调用 FloatingActionButton1.ShowFAB 显...