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Modbus硬件控制01——什么是Modbus - 创客硬件开发 - 清泛IT社区，为创新赋能！
本帖最后由 mzb2012 于 2025-06-19 12:37 编辑
Modbus算是嵌入式领域比较经典一种通信协议，不管你是初学者，还是工作多年的工程师，都很有必要了解一下。1.什么是Modbus?1.什么是Modebus它是一个Bus，即总线协议。比如串口协议、IIC...
Modbus硬件控制02——modbus继电器 - 创客硬件开发 - 清泛IT社区，为创新赋能！
本帖最后由 mzb2012 于 2025-07-15 12:26 编辑
一、概述
该模块是一款以专用集成电路为核心的经济型MODBUS-485继电器模块,实现了标准MODBUS-485通信功能。它可以与9V，12V或24V电压配合使用。本模块支持所有常见波特率、停止位和校验...
std::wstring VS std::string
... the C++ program contains implementation-defined behavior as to whether olè is encoded as UTF-8 or not. Further more, the reason you cannot natively stream wchar_t * to std::cout is because the types are incompatible resulting in an ill-formed program and it has nothing to do with the use of encod...
What's the difference between ASCII and Unicode?
...quence, they didn't need to support accents or other
marks such as á, ü, ç, ñ, etc. (aka diacritics).
ASCII Extended
Some clever people started using the 8th bit (the bit used for parity) to encode more characters to support their language (to support "é", in French, for example). Just using o...
How to recursively download a folder via FTP on Linux [closed]
... Sep 22 '08 at 9:01
Thibaut BarrèreThibaut Barrère
8,38322 gold badges1919 silver badges2727 bronze badges
...
How to encode the filename parameter of Content-Disposition header in HTTP?
...pera 12, FF25, Safari 6, using this filename for download: 你好abcABCæøåÆØÅäöüïëêîâéíáóúýñ½§!#¤%&()=`@£$€{[]}+´¨^~'-_,;.txt
On IE7 it works for some characters but not all. But who cares about IE7 nowadays?
This is the function I use to generate safe file names f...
Improving bulk insert performance in Entity framework [duplicate]
... answered Nov 6 '13 at 12:21
Måns TånnerydMåns Tånneryd
47344 silver badges88 bronze badges
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MQTT相关知识研究笔记 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...区别？Node-RED 是一种编程工具，用于以新颖有趣的方式将硬件设备、API 和在线服务连接在一起。
Node-RED 是一个流程化的工具，不是MQTT网关，它能整合各种资源包括MQTT网关、微信推送、天气推送等服务节点，定义执行流程将各...
How can I unit test a GUI?
...erformance gain could one expect compared to MD5?
– Lèse majesté
Jul 4 '12 at 5:33
1
You answer...
Close and Dispose - which to call?
...ing that explicitly utilizes Open(), AFAIK.
– René Kåbis
Oct 1 '16 at 18:05
I'm not sure about other DBMS, but you c...