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手机当上位机：用二进制协议和设备收发数据 · App Inventor 2 中文网
... 设备
01
读温湿度
设备 → App
81 + 温度（2 字节，乘 10，有符号，高字节在前）+ 湿度（1 字节）
温湿度回复
App → 设备
02 + 01/00
开灯 / 关灯
设备 → App
82 + 当前...
Bad arguments to +：The operation + cannot accept the arguments · App Inventor 2 中文网
...
Bad arguments to +
The operation + cannot accept the arguments:, [""], [81]
原因
原因是加号 + 前面是空字符串，不能有效地转换成数字，所以报错。
比如 "123" 这个字符串可以自动转数字，但是空文本不行。
解决...
MLKitImageLabeler 拓展：离线图像标注（拍照识物） · App Inventor 2 中文网
...fidence":0.92,"index":0},
{"label":"Plant","name":"植物","confidence":0.81,"index":1}]
四、识别 Base64 图片（例如从摄像头或网络拿到的）
when 按钮_Base64.Click() {
ImageLabeler1.LabelFromBase64(文本输入框_Base64.Text)
}
五、给...
App Inventor 2 中文网原创内容 · App Inventor 2 中文网
... arguments to +：The operation + cannot accept the arguments:, [””], [81]
【已解决】Error 1103: Unable to complete the given request with the text
【已解决】Your device does not have a scanning application installed.
【已解决】The operation is list empty? cannot accept the ...
App Inventor 2 中文网原创内容 · App Inventor 2 中文网
... arguments to +：The operation + cannot accept the arguments:, [””], [81]
【已解决】Error 1103: Unable to complete the given request with the text
【已解决】Your device does not have a scanning application installed.
【已解决】The operation is list empty? cannot accept the ...
二进制数据专题：蓝牙、Socket、WebSocket、MQTT 收发字节 · App Inventor 2 中文网
...读取
01
A5 5A 01 01 01
温湿度回复
81 + 温度高字节 + 温度低字节 + 湿度
A5 5A 04 81 00 EB 2D 9C
请求开灯
02 01
A5 5A 02 02 01 04
开灯确认
82 01
A5 5A 02 82 01 84
...
Phase • Animations made easy! - Extensions - Kodular Community
...ng this for me.
Download [Version: 3.1]
Direct: io.shreyash.phase.aix (81.1 KB)
Google Drive: https://drive.google.com/file/d/1fviQil8GOeSvVWMKMOxG1Hi82M4qOCNQ/view?usp=sharing
Let me know if you find any bugs/errors. Also, I’m open to suggestions and feature requests.
...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...P INVENTOR”, Journal of Computing Sciences in Colleges 29.6 (June 2014): 81-89. Print.
[2] iSuppli. ``Global Shipment Forecast for Touch-screen Displays from 2012 to 2016 (in Billion Units).” in Statista - The Statistics Portal. Statista. 08 Oct 2015. http://www.statista.com/statistics/259983/g...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...P INVENTOR”, Journal of Computing Sciences in Colleges 29.6 (June 2014): 81-89. Print.
[2] iSuppli. ``Global Shipment Forecast for Touch-screen Displays from 2012 to 2016 (in Billion Units).” in Statista - The Statistics Portal. Statista. 08 Oct 2015. http://www.statista.com/statistics/259983/g...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...P INVENTOR”, Journal of Computing Sciences in Colleges 29.6 (June 2014): 81-89. Print.
[2] iSuppli. ``Global Shipment Forecast for Touch-screen Displays from 2012 to 2016 (in Billion Units).” in Statista - The Statistics Portal. Statista. 08 Oct 2015. http://www.statista.com/statistics/259983/g...