大约有 700 项符合查询结果（耗时：0.0067秒） [XML]
为啥“蓝牙客户端”组件在连接设备时就没反应了？ - 创客硬件开发 - 清泛IT...
...的情况下，连接的步骤卡住了，有时报错：“Error 507: Unable to connect. Is the device turned on?”
这时可以考虑是否时硬件没有开机，或者硬件蓝牙版本是否是2.0经典蓝牙。最终用户使用ble拓展，成功连接及测试成功。
也就是硬件...
解决 Error 503: The specified address is not a valid Bluetooth MAC add...
...式不对，蓝牙列表可能显示不对。大概率是经典蓝牙和 ble 低功耗蓝牙的设备列表处理的方式不对。
本例中就是经典蓝牙，但是用的 ble 的方式显示导致的问题。
- AI 助手 - 清泛IT社区，为创新赋能！
设置屏幕、组件的各种属性
美化界面
背景改个颜色
导入各种拓展
导入ble
导入mqtt拓展
添加一个函数
ble demo
App Inventor 2 经典蓝牙(SPP) 硬件接入：hc05 · App Inventor 2 中文网
...
Error 515: Not connected to a Bluetooth device.
Error 507: unable to connect. is the device turned on?
乱码问题排查思路
参与讨论
« 返回首页 Iot 专题
经典蓝牙硬件有很多款，但是hc05尤为常见，这里以hc05为例，介绍一下经典蓝...
What is makeinfo, and how do I get it?
...d Sep 4 '19 at 21:25
Samuel LelièvreSamuel Lelièvre
1,74388 silver badges1414 bronze badges
...
How to find the foreach index?
... edited Dec 14 '17 at 3:16
buræquete
12.5k44 gold badges3131 silver badges6262 bronze badges
answered Sep 26 '08 at 18:25
...
Android: Is it possible to display video thumbnails?
...ed Mar 9 '16 at 23:33
Edouard BrèthesEdouard Brèthes
93299 silver badges2424 bronze badges
...
How to add a button to UINavigationBar?
...red Mar 23 '10 at 23:45
Mads MobækMads Mobæk
29.5k2020 gold badges6464 silver badges7575 bronze badges
...
Why does the PHP json_encode function convert UTF-8 strings to hexadecimal entities?
...
This also works with Danish letters Æ,æ,Ø,ø,Å,å Thank you!
– ymerdrengene
Jan 22 '16 at 11:23
...
Can jQuery read/write cookies to a browser?
Simple example: I want to have some items on a page (like divs or table rows), and I want to let the user click on them to select them. That seems easy enough in jQuery. To save which items a user clicks on with no server-side post backs, I was thinking a cookie would be a simple way to get this don...