http://www.crecorder.com/techInfo/commuProtocols.jsp COMMUNICATION PROTOCOLS A “communication protocol” is a means by which data is exchanged between the vehicle’s on-board computer and an external data retrieval device, such as a Code Reader or Scan…

MGR优雅升级到MySQL8.0.16 传统的升级手段之一,5.7 MGR集群与8.0 MGR集群进行数据传输,程序切换新集群后测试是否正常. 如果不正常,要么将新集群的新增数据同步回旧集群,要么就舍弃掉这部分数据,一般看来这种回滚都是繁琐的,繁琐的操作一般都会相应的增加风险. 8.0.16的发布也带来一个新的功能-MGR通信协议的支持,可以让我们更轻松地切换到8.0,或者轻松地再切换回5.7.那么什么是MGR通信协议呢? MGR通信协议(The Communication Protocol I…

我在本机安装了DB2 9.5. 使用java jdbc连接,一直没有问题. QC for db2 连接 也一直没有问题. 突然有一天 Java程序连接 报错: A communication error has been detected. Communication protocol being used: Reply.fill(). Communication API being used: InputStream.read(). Location where the error was d…

前面转载的几篇文章详细介绍了UART.RS-232和RS-485的相关内容,可以知道,串口通信的双方在硬件层面需要约定如波特率.数据位.校验位和停止位等属性,才可以正常收发数据.实际项目中使用串口通信时,一般还需要设计一套通讯协议.那么设计串口通讯协议有什么需要注意的地方呢?本文以iPod.车载CAN解码盒及IoT设备EnOcean的串口通讯协议为例,对通讯协议数据帧的定义做一个简单的介绍和分析. 首先看Apple提供的文档<iPod_Accessory_Protocol_Interface_S…

http://www.fastfieros.com/tech/vpw_communication_protocol.htm Breakdown of the j1850 3 byte Header format Byte1 = priority Bits 7,6 and 5 are priority 0=High, 7=Low Bit 4 is header style (0=3 byte header-GM, 1=1 byte header-??) Bit 3 is In Frame Resp…

Universally Compatible Wireless Power Using the Qi Protocol Wireless charging of portable electronic devices is here now. It will become ubiquitous when all such devices adhere to the same standard. By Upal Sengupta and Bill Johns, Texas Instruments…

https://mayaposch.wordpress.com/2011/10/03/design-your-own-protocol-in-five-minutes ----------------------------------------- Among the most scary and official sounding terms in computing we find the word ‘protocol’. Its meaning really isn’t that sca…

w https://en.wikipedia.org/wiki/Remote_procedure_call In distributed computing a remote procedure call (RPC) is when a computer program causes a procedure (subroutine) to execute in another address space (commonly on another computer on a shared netw…

全球统一的重型发动机的车载诊断系统(WWH-OBD) ISO/PAS 27145 is intended to become the single communication standard for access to OBD-related information. To allow for a smooth migration from the existing communication standards to this future world-wide standardized c…

On-Board Diagnostics J1962 Diagnostic Connector Equivalent to ISO/DIS 15031-3: December 14, 2001J2012 Diagnostic Trouble Code Definitions J1939 Recommended Practice for a Serial Control and Communications Vehicle NetworkJ1979 E/E Diagnostic Test Mode…