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Re: Serial port communication yin asp.net

freewill78 — Thu, 09 Jul 2009 20:49:54 GMT

We will use something similiar. My method would be write a windows service running in background and handing with serial communciation or TCP/IP, UDP and link functions to a database. Clients then would see new data or enter command request thru SQL database. A windows service application and database would be a bridge between clients and any hardware

Re: Serial port communication in asp.net

gerrylowry — Sat, 04 Jul 2009 00:20:32 GMT

@ fcrombeen:

One guess: write something like an ActiveX control as a bridge between your web app and your MSR.

I'm curious: "a kiosk application that will be web based"??????

Since a kiosk is a physical computer, there is AFAIK zero need for it to be web based; I would write it a a standard desktop application and use something behind the scenes from the TCP/IP suite of protocols to use the Internet as a back end.

Depending on security, some kiosks should be on private networks and not on the Internet; a typical example is a bank card terminal know as an ATM (automated teller machine); for all intents and purposes, an ATM is a kiosk.

Gerry

Re: Serial port communication in asp.net

fcrombeen — Fri, 03 Jul 2009 19:27:55 GMT

Hey Gerry - I read this thread and I think I may be trying to do something similar.

I am writing a kiosk application that will be web based - C#, VS2008. The kiosk is an IBM Anyplace kiosk that has an MSR (magnetic stripe reader) physically attached. The MSR is configured to work on COM3 - 19200, 8, N,1. I wrote a quick little desktop app using the serial port listening objects in .Net and I was able to detect the card swipe, parse out the mag stripe and display the contents in a sampe form.

I'm now trying to do the same thing on an aspx page that will be displayed on my kiosk. The page is simple - it displays a graphic asking the person to swipe their credit card. I understand that once the .aspx page is loaded it is now client side, and that .aspx pages normally cannot communicate with hardware due to security restrictions.

I've got a call out to IBM to see if they have any Java objects that might fit the bill. In your experience do you have any idea how I might accomplish this?

Re: Serial port communication in asp.net

suthakar — Tue, 30 Jun 2009 04:18:47 GMT

Thanks sir, i will be back soon... take care

Re: Serial port communication in asp.net

gerrylowry — Mon, 29 Jun 2009 22:09:21 GMT

P.S.: note, at http://www.microsoft.com/library/media/1033/windowsxp/images/using/networking/setup/68588-diagram-ap.gif, the two computers are NOT talking to each other; rather, they are both talking to "the Internet". In theory, they might even be on separate subnets.

In the above mentioned diagram, if they want to talk to each other, it would be by following a route out to the Internet and then back from the Internet to the "other" computer.

Gerry

Re: Serial port communication in asp.net

gerrylowry — Mon, 29 Jun 2009 22:04:38 GMT

suthakar, if all of your computers are in the same facility, then the diagram is not relevant. They can simply drop tiny files on the server and the server can aggregate them. Alternatively, the server can have a local application that they talk to via your network constantly.

If your server is remote, you can still have similar scenarios as above by using VPN connections.

VPN will be slow but FTP will be slower. You could possible create some form of web service on your server and have your local PCs talk to that service.

You need to simplify your application into two or more separate parts. E.g.: one component would gather the serial data, another component would worry about how it gets that data to the server; the server component would deal with aggregating the data.

Gerry

Re: Serial port communication in asp.net

suthakar — Mon, 29 Jun 2009 08:17:18 GMT

reference image for my project

http://www.microsoft.com/library/media/1033/windowsxp/images/using/networking/setup/68588-diagram-ap.gif

Re: Serial port communication in asp.net

suthakar — Mon, 29 Jun 2009 08:11:59 GMT

Thanks for your effective replies sir,

S... this is real time application only. i want trigger the data_received event wherever data received from the clients. i connected GSM kit for all the system.

If i will receive a data from GSM kit to system via Serial port. if data received from GSM kit mean i want to sleep the current process and start the new process and do some other works from some other pages

Re: Serial port communication in asp.net

gerrylowry — Fri, 26 Jun 2009 11:47:53 GMT

suthakar, in your previous post, you said the modem was connected directly to the server. I do not understand ...

TIMTOWTDI =. there is more than one way to do it

are your clients in the same room as your server?

a remote client computer can capture information from its serial port and then send it via FTP to the server.

TIMTOWTDI

???? are you trying to do something in real time?

???? is this simply aggregating data for reporting purposes?

I really do not understand what you are trying to achieve. That makes it difficult for anyone to answer your question.

Perhaps you can explain your design goals, your design constraints, and your physical architecture in more detail?

Gerry

Re: Serial port communication in asp.net

gerrylowry — Fri, 26 Jun 2009 11:40:27 GMT

suthakar, you are talking about architecture (A) ...

(A)

external GSM modem<====>serial port[web_server] ...... Internet ..... [web_client]

Earlier in this thread, I showed you what to check out:

Here is what you should read to meet your serial port listening needs:

http://msdn.microsoft.com/en-us/library/system.io.ports.serialport.aspx

also: http://lmgtfy.com/?q=c%23+baud+port+even+stop+handshake+site%3Amsdn.microsoft.com

If you want to purchase someone's SKD, it's probably safe ~~ I would ask them for references from their existing customers. You probably do not need an SDK from a third party.

Also, the manufacturer of your modem should have documentation to help you.

You have at least two options: do it yourself; hire a specialist.

Gerry

Re: Serial port communication in asp.net

suthakar — Fri, 26 Jun 2009 05:05:13 GMT

i am having 5 client systems and one server. all the system having wireless kit. all the clients sends the data to server via serial port. i want to collect and save the all the data in to server.

Now i am using ASP.net and C#.

but i need to get data from wireless kit via serial port in whole day. Is it possible to communicate. otherwise can i change the environment web application to windows...

Re: Serial port communication in asp.net

suthakar — Fri, 26 Jun 2009 04:58:36 GMT

ok sir, i have connected my kit with my server via serial port. Asp webpage runs in a server only. i want receive or send data via serial port in server only. there is a SDK available for serial port communication. can i use it. is it safe for our project?

Re: Serial port communication in asp.net

gerrylowry — Thu, 25 Jun 2009 17:28:12 GMT

suthakar .... you can not have what you want per se.

you need a multi-tier architecture because the hardware that talks to the external GSM modem via the serial port must be physically connected to the external GSM modem.

Therefore:

(A)

external GSM modem<====>serial port[web_server] ...... Internet ..... [web_client]

(B)

external GSM modem<====>serial port[data_layer_computer]<====>[web_server] ...... Internet ..... [web_client]

(C)

external GSM modem<====>serial port[data_layer_computer] ..... Internet ..... [web_server] ...... Internet ..... [web_client]

<====> =. physical connection

....... =. TCP/IP connection

suthakar, please study the above three architectures. Remember, physical devices without wireless connectivity must be physically connected to whatever computer needs to communicate with the physical device.

Gerry

Re: Serial port communication in asp.net

suthakar — Tue, 23 Jun 2009 07:24:37 GMT

thanks for the mail sir,

i got serial port communication in windows application. but i need serial port communication in web application. i am developing asp.net appplication in my server side. i need to communicate with external GSM modem via serial port.

Re: Serial port communication in asp.net

gerrylowry — Mon, 22 Jun 2009 12:45:51 GMT

I do not see what this has to do with the ASP.NET paradigm.

I think you may be mixing ideas here. I'm not sure what you're trying to achieve.

Example:

ASP.NET MVC or WebForms

(a) a page request is received

(b) ASP.NET application displays that page and goes back to sleep

(d) ASP.NET application responds appropriately and goes back to sleep.

et cetera

----------------------------------------

serial port processing

(i) local application starts and negotiates connectivity with serial port.

(ii) local application runs constantly, no sleeping, and continuously listens to serial port.

----------------------------------------

Here is what you should read to meet your serial port listening needs:

http://msdn.microsoft.com/en-us/library/system.io.ports.serialport.aspx

also: http://lmgtfy.com/?q=c%23+baud+port+even+stop+handshake+site%3Amsdn.microsoft.com

suthakar:
i have got Data_received event occurs in windows application... can u guide me for asp.net application.

All you can do AFAIK is to store your data in your ASP.NET MVC Model until a user requests it by clicking a submit button.

Alternatively, your web page on your end user's computer could continuously request updates using Ajax.

Ajax example tutorial: #39 | Iteration #7 – Add Ajax functionality View in VB or C#

Regards,
Gerry (Lowry)