大约有 1,100 项符合查询结果(耗时:0.0083秒) [XML]

https://www.tsingfun.com/it/ai2/2694.html 

app inventor拍照的照片如何保存到手机相册? - App Inventor 2 中文网 - ...

...存到手机相册?问:你好!小朋友在做APP时,调用照相机模块拍的照片要存到相册里,指定了图像位址,但还是实现不了,是什么原因呀?首先,这个照相机拍照完成事件中这个参数是图片的路径,是只读 问:你好!小朋友在...
https://bbs.tsingfun.com/thread-2312-1-1.html 

ble蓝牙的标识符怎么确定的 - App Inventor 2 中文网 - 清泛IT社区,为创新赋能!

...回答,仅参考------------------------------您好!关于蓝牙发送模块中的 ServiceUUID,这是一个非常关键的概念,尤其是在使用 BLE(低功耗蓝牙)时。下面我来为您详细解释一下:什么是 ServiceUUID?ServiceUUID 是蓝牙服务的唯一标识符(UU...
https://bbs.tsingfun.com/thread-2366-1-1.html 

低功耗蓝牙接收串口16数据 - App Inventor 2 中文网 - 清泛IT社区,为创新赋能!

低功耗蓝牙模块用串口助手发送16进制数据,手机接收数据一直在跳变(没电脑没发数据也在跳变)。接收到的是10进制的数据通过调用AsciiConversion1模块转化和提取转化都不行。波特率设置为9600,这个很重要!! 经过测试,...
https://bbs.tsingfun.com/thread-2973-1-1.html 

App Inventor接入Supabase:开源免费的后端新选择 - App Inventor 2 拓展 -...

...tor扩展组件,你可以使用Supabase的以下核心功能: 功能模块说明Auth认证邮箱注册、手机验证、匿名登录、OAuth第三方登录PostgreSQL数据库强大的关系型数据操作,支持复杂查询Realtime订阅数据库变化实时通知App文件存储云端文件...
https://bbs.tsingfun.com/thread-3120-1-1.html 

App如何处理硬件上报的高频数据? - 创客硬件开发 - 清泛IT社区,为创新赋能!

用户提问: 手机APP端订阅并接受下位机蓝牙模块上传的指令或数据,有时候可能会拥堵,就是在同一个时间节点连续收到很多条下面发来的消息或数据, 例如下位机会随机报错上传各个模块的硬件故障信息,很可能会同一时...
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Determine font color based on background color

... Javascript [ES2015] const hexToLuma = (colour) => { const hex = colour.replace(/#/, ''); const r = parseInt(hex.substr(0, 2), 16); const g = parseInt(hex.substr(2, 2), 16); const b = parseInt(hex.substr(4, 2), 16); ...
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Max length for client ip address [duplicate]

... to 32 bits of IPv4 addresses). They are usually written as 8 groups of 4 hex digits separated by colons: 2001:0db8:85a3:0000:0000:8a2e:0370:7334. 39 characters is appropriate to store IPv6 addresses in this format. Edit: However, there is a caveat, see @Deepak's answer for details about IPv4-map...
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Fatal error in launcher: Unable to create process using “”C:\Program Files (x86)\Python33\python.exe

...th in the executable pip.exe when it is installed. Edit this file using a hex editor or WordPad (you have to save it as plain text then to retain binary data), change the path to Python with quotes and spaces like this: #!"C:\Program Files (x86)\Python33\python.exe" to an escaped path without sp...
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Looking for ALT+LeftArrowKey solution in zsh

...b-tab and enter the following: Move cursor one word left ⌥+← Send Hex Codes: 0x1b 0x62 Move cursor one word right ⌥+→ Send Hex Codes: 0x1b 0x66 And that should give you the desired behavior not just in ZSH, but also if you SSH into a server running BASH, irb/pry, node etc. ...
https://bbs.tsingfun.com/thread-3130-1-1.html 

【Mixly×AI2系列·第5讲】手机发指令控制LED/舵机:蓝牙双向通信实战① - ...

... 二、器件清单 • Arduino UNO × 1(或 Nano) • HC-05 蓝牙模块 × 1(默认波特率 9600) • LED(含 220Ω 电阻)× 1,接 D13 或面包板 • SG90 舵机(选做)× 1,接 D9 • 面包板 + 杜邦线若干 接线:HC-05 VCC→5V,GND→GND,TXD→Arduino...