串口通信浏览器小程序，基于跨浏览器的原生小程序系统-PluginOK(牛插)中间件(https://github.com/wangzuohuai/WebRunLocal)网络标准版开发，底层实现调用微软串口通讯控件MSComm32.ocx，最低可用在Chrome 41、Firefox 50、Edge 80(Chromium内核)、360极速/安全、IE 8、Oprea 36、QQ、搜狗等浏览器，也兼容运行于这些浏览器的最新版本。通过此小程序，可以在浏览器中通过JS非常方便的操作COMM串口打印机、GSM 猫、手机、扫描枪、屏显、钱箱等设备。小程序中涉及到的属性等含义，请直接参考 微软串口通讯控件MSComm32.ocx中的定义，也可以参考这里：https://blog.csdn.net/shenziheng1/article/details/52884444

以下是体验小程序步骤：
1、访问测试网页 http://local.zorrosoft.com/ 下载最新的PluginOK中间件并按TestWrl.txt说明安装好中间件；

2、请求安装串口小程序，在测试页面上输入 ws://localhost:83?sid=123&flag=1 先连接上中间件服务，然后输入以下内容点击发送：

{"req":"Plugin_Install","rid":1,"para":{"Name":"串口通信浏览器小程序","PID":"C0B01CD6-7DD9-4D3C-B668-04168D5236FC","Date":"2021-05-06","Desc":"PluginOK中间件之上跨浏览器的串口通信小程序，可在Chrome、Edge、Firefox、IE、Opera、360、QQ等的浏览器最新版中调用","DownAddr":"http://local.zorrosoft.com/Files/Net/WrlComm.pid","MD5":"2575634215F025C85BFAA2E42A945C39","Version":"2.1.3.2","Size":589824,"HideIns":0,"Type":1,"Cookie":"","Auth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}}

3、请求串口小程序更新：

{"req":"Plugin_Update","rid":1,"para":{"Name":"串口通信浏览器小程序","PID":"C0B01CD6-7DD9-4D3C-B668-04168D5236FC","Date":"2021-05-06","Desc":"PluginOK中间件之上跨浏览器的串口通信小程序，可在Chrome、Edge、Firefox、IE、Opera、360、QQ等的浏览器最新版中调用","DownAddr":"http://local.zorrosoft.com/Files/Net/WrlComm_Update.pid","MD5":"65AC1E8E43323E5920658D0536D227C5","Version":"2.1.3.2","Size":589824,"HideIns":0,"Type":1,"Cookie":"","Auth":"","TK":"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"}}

以上安装和升级的JSON请求包，可能因版本升级导致内容不同，如遇安装或升级时报错，请联系客服获取最新的请求包。 

4、连接请求串口通讯小程序服务：
说明：以下功能请通过Web Socket连接后可执行，如默认侦听端口不是80(关于如何配置侦听端口，请参考SDK包中的文档“PluginOK开发者手册.doc”)，请在连接地址中指定端口号进行连接。
打开测试网页，输入地址：ws://wrl.zorrosoft.com:83?sid=668&pid=407F58DA-67A5-4C74-B9F9-44A02A20B205&flag=1 点击连接；
支持的协议功能如下：

A、获取参数
{"req":"SP_Get","rid":1,"para":{"Items":["EventFlag","Base64","CDHolding","CDTimeout","CommID","CommPort","CTSHolding","CTSTimeout","DSRHolding","DSRTimeout","DTREnable","Handshaking","InBufferSize","InBufferCount","Break","InputLen","Interval","NullDiscard","OutBufferSize","OutBufferCount","ParityReplace","PortOpen","RThreshold","RTSEnable","Settings","SThreshold","Output","Input","CommEvent","EOFEnable","InputMode"]}} 
获取指定名称的参数值，可批量获取，也可以获取单个。其中EventFlag默认0，为1时采用事件驱动模式，收到内容自动通知到前端(SP_Event事件)，Base64指定通讯内容是否经过Base64编码后传输，默认0，如果通讯内容是二进制推荐设置为1，Output和Input内容如果Base64设置为1表示是Base64编码后的结果，原通讯控件中布尔值规则1为真，0为假。其它参数都是串口通讯的属性。
返回内容格式如下：
{"ret":0,"rid":1,"data":{"EventFlag":0,"Base64":0,"CDHolding":0,"CDTimeout":0,"CommID":-1,"CommPort":1,"CTSHolding":0,"CTSTimeout":0,"DSRHolding":0,"DSRTimeout":0,"DTREnable":0,"Handshaking":0,"InBufferSize":1024,"InBufferCount":0,"Break":0,"InputLen":0,"Interval":1000,"NullDiscard":0,"OutBufferSize":1024,"OutBufferCount":0,"OutBufferCount":"?","PortOpen":0,"RThreshold":0,"RTSEnable":0,"Settings":"9600,n,8,1","SThreshold":0,"Output":"","Input":"","CommEvent":-4083,"EOFEnable":0,"InputMode":0}} 
请求Items中的每个名称都对应自己名称的值

简单举例1，获取当前操作的COM端口、波特率及是否打开：{"req":"SP_Get","rid":2,"para":{"Items":["PortOpen","CommPort","Settings"]}}
{"ret":0,"rid":2,"data":{"PortOpen":1,"CommPort":1,"Settings":"9600,n,8,1"}}  代表当前打开了COM1端口，使用的波特率是9600,n,8,1
简单举例2，获取端口收到的内容：{"req":"SP_Get","rid":3,"para":{"Items":["Output"]}} 
{"ret":0,"rid":3,"data":{"Output":"OK"}}  代表当前端口收到内容OK

B、设置参数
{"req":"SP_Put","rid":6,"para":{"CommPort":1,"CDTimeout":0,"CTSTimeout":0,"DSRTimeout":0,"DTREnable":0,"Handshaking":0,"InBufferCount":0,"Break":0,"Interval":1000,"NullDiscard":0,"OutBufferCount":0,"OutBufferCount":"?","RThreshold":0,"RTSEnable":0,"SThreshold":0,"CommEvent":0,"EOFEnable":0}} 
设置指定名称的参数值，规则和获取参数类似。
返回内容格式如下：
{"ret":0,"rid":6,"data":{"CommPort":1,"CDTimeout":1,"CTSTimeout":1,"DSRTimeout":1,"DTREnable":1,"Handshaking":1,"InBufferCount":1,"Break":1,"Interval":1,"OutBufferCount":1,"RThreshold":1,"RTSEnable":1,"SThreshold":1,"CommEvent":0,"EOFEnable":1}} 
每个设置结果，在对应的结果中，1成功，0失败

C、指定参数打开端口
EventFlag为1时收到内容自动通知到前端(SP_Event事件)
Base64 接收和发送的内容是否经过Base64编码
CommPort 指定打开的端口序号
Settings 设置波特率等参数如：115200,n,8,1
InBufferSize OutBufferSize 读写缓冲区大小都是1024，
InputLen 设置当前接收区数据长度为0，表示全部读取
InputMode 串口接收数据的模式 0文本，1二进制内容
RThreshold  接收缓冲区有1个以及1个以上字符时，将引发接收数据的OnComm事件
协议举例：
{"req":"SP_Open","rid":15,"para":{"EventFlag":0,"Base64":0,"CommPort":2,"Settings":"115200,n,8,1","InBufferSize":1024,"OutBufferSize":1024,"InputLen":0,"InputMode":0,"RThreshold":16}}
{"ret":0,"rid":19,"data":{"Ret":1,"Code":0}}  Ret为1代表打开成功，Code为错误时错误码

D、读取端口数据
{"req":"SP_Read","rid":18,"para":{}}
如果Base64设置为1，Content为Base64编码后的内容
{"ret":0,"rid":18,"data":{"Content":"OK"}}  取到Content内容为OK

E、写数据端口
如果Base64设置为1，则Content必须是经过Base64编码后的内容(用于二进制流) 写端口：
{"req":"SP_Write","rid":19,"para":{"Content":"AT"}}
{"ret":0,"rid":19,"data":{"Ret":1,"Code":0}}  Ret为1代表关闭成功，Code为错误时错误码

F、关闭端口协议：
{"req":"SP_Close","rid":20,"para":{}}
请求返回：
{"ret":0,"rid":20,"data":{"Ret":1,"Code":0}}  Ret为1代表关闭成功，Code为错误时错误码

5、事件通知
5.1 收到内容通知
{"event":"SP_Rec","data":{"Content":""}} 如果Base64为1，内容Content里是Base64编码后的结果，实际使用时请用Base64编码还原内容

5.2 发送内容通知
{"event":"SP_Send","data":{"Content":""}} 如果Base64为1，内容Content里是Base64编码后的结果，实际使用时请用Base64编码还原内容

5.3  通讯事件通知
{"event":"SP_Event","data":{"ID":""}} "ID为事件类型 1发送事件、3 clear-to-send 线变化、4 data-set ready 线变化、5 carrier detect 线变化、6 振铃检测、7 文件结束

5.3  错误事件通知
{"event":"SSP_Error","data":{"ID":""}} "ID为错误类型：
    comInvalidPropertyValue = 380,无效属性值
    comSetNotSupported = 383,属性为只读
    comGetNotSupported = 394,属性为只写
    comPortOpen = 8000,端口打开时操作不合法
    8001 超时值必须大于 0 
    comPortInvalid = 8002,无效端口号
    8003 属性只在运行时有效
    8004 属性在运行时为只读
    comPortAlreadyOpen = 8005,端口已经打开
    8006 设备标识符无效或不支持该标识符 
    8007 不支持设备的波特率
    8008 指定的字节大小无效
    8009 缺省参数错误
    8010 硬件不可用（被其它设备锁定）
    8011 函数不能分配队列 
    comNoOpen = 8012,设备没有打开
    8013 设备已经打开
    8014 不能使用通信通知 
    comSetCommStateFailed = 8015,不能设置端口状态
    8016 不能设置 comm 事件屏蔽 
    comPortNotOpen = 8018,仅当端口打开时操作才有效
    8019 设备忙
    comReadError = 8020,读端口设备错误
    comDCBError = 8021,为该端口检索设备控制块时的内部错误

    comBreak = 1001,接收到中断信号 
    comCTSTO = 1002, Clear-to-send 超时 
    comDSRTO = 1003,Data-set ready 超时 
    comFrame = 1004,帧错误 
    comOverrun = 1006,端口超速
    comCDTO = 1007,Carrier detect 超时 
    comRxOver = 1008,接收缓冲区溢出 
    comRxParity = 1009,Parity 错误 
    comTxFull = 1010,传输缓冲区满 
    comDCB = 1011检索端口 设备控制块 (DCB) 时的意外错误 


6、其它
请求参数的JSON数据包，请确保是UTF-8无签名的编码。
更多接口请求说明，请参考安装目录中的文档TestWrl.txt、SDK包中的“PluginOK开发者手册.doc”及“PluginOK中间件安全解决方案”。
如还有疑问请直接联系客服 加微信：ZorroSoft，或加QQ群：23126938