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https://bbs.tsingfun.com/thread-1674-1-1.html 

手机APP上的串口通信组件 - 创客硬件开发 - 清泛IT社区,为创新赋能!

... Iot 专题)手机串口通信模型如下:可以看到,手机串口连接时,没有像PC那样指定“COM3”等端口,而是直接使用默认的USB设备: 有一个英文原版视频,请参考“串口通信器“组件相关文档:《App Inventor 2 串口组件:App使用OTG...
https://bbs.tsingfun.com/thread-2149-1-1.html 

GoPrint aia源码 UI界面现代、代码不复杂,参考性强 - .aia 案例源码 - 清...

屏幕数量:6个,UI界面现代、代码不复杂,参考性强。 需要连接蓝牙硬件进行通信,具体逻辑请自行研究。
https://bbs.tsingfun.com/thread-1458-1-1.html 

蓝牙客户端组件:为什么不显示蓝牙设备列表?为啥蓝牙列表为空 - App Inven...

转会员提问:蓝牙客户端组件:为什么不显示蓝牙设备列表?为啥蓝牙列表为空? 解决方法:设置中打开 app 的“附近设备权限”即可。
https://www.tsingfun.com/it/opensource/630.html 

win7 安装项目管理工具redmine2.5.1 - 开源 & Github - 清泛网 - 专注C/C++及内核技术

...ine.* TO 'redmine'@'localhost'; flush PRIVILEGES; d) 修改redmine连接数据库文件: redmine目录下的config/database.yml.example 改为config/database.yml 修改production一段: production: adapter: mysql2 database: redmine host: localhost username: root ...
https://bbs.tsingfun.com/thread-2230-1-1.html 

解决 Error 503: The specified address is not a valid Bluetooth MAC add...

...ss is not a valid Bluetooth MAC address. 原因是地址格式不对,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。
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Set selected item of spinner programmatically

... An error with this code is that @Boardy want the selection of Category 2 which I suppose is a String (assuming he tried using Spinner.SelectedText = "Category 2") but the above code is for a long. – Arun Ge...
https://www.tsingfun.com/it/opensource/451.html 

Linux下部署企业级邮件服务器(postfix + dovecot + extmail) - 开源 & Gith...

...空格或tab的文本行视为上一行的延续; 5、启动postfix,连接发信 四、为postfix开启基于cyrus-sasl认证功能 1、检查postfix是否支持cyrus-sasl认证 postconf -a 2、配置postfix的主配置文件 vim /etc/postfix/main.cf 在最后添加以下内容 ...
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Convert a RGB Color Value to a Hexadecimal String

...ger g = sGreen.getValue(); Integer b = sBlue.getValue(); Color hC; hC = new Color(r,g,b); String hex = Integer.toHexString(hC.getRGB() & 0xffffff); while(hex.length() < 6){ hex = "0" + hex; } hex = "Hex Code: #" + hex; return hex; } ...
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转:postfix安装Q&A - 更多技术 - 清泛网 - 专注C/C++及内核技术

...错提示。 QUOTE: Q: smtpd认证失败:无权限连接authdaemond Nov 20 15:58:54 bsd6 postfix/smtpd[900]: warning: SASL authentication failure: cannot connect to Courier authdaemond: Permission denied A: 检查 authdaemond的socket所在目录及其父目录的属...
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Ruby Bundle Symbol not found: _SSLv2_client_method (LoadError)

... @twelve17 The errors are related to not being able to find an SSL library and the OP mentioned that they had recently upgraded their installed version of openssl. I had the same issue with the same upgrade scenario; I suspect the reinstall...