Anyone ever programmed to access an RFID reader in Foxpro? 2

[Mike Gagnon]

Anyone ever programmed to access an RFID reader in Foxpro?



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[Mandy_crw]

I do mike... But there is one rfid reader that did'nt work...

 

[Mike Gagnon]

I am comfortable programming for a barcode reader is RFID reader the same principle?



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[Chris Miller]

I can imagine that, and I in past threads tomk3 entojned RFID scanners can also act as keyboard. It just allows you to read in tags and not write to them, of course.

I can also imagine that an RFID reader is put into a state to read in any RFID that comes close enough for near field detection. That's at least an aspect I'd expect from a reader assisting with theft detection or also for an automatic POS system. That would rather trigger an event and thereby notify you of the RFID data.

Well, in the end a keyboard input is also just a series of keyboard events, but you'll not detect whether this is from an RFID or just actual human input, so I assume there will be a driver that will allow you to subscribe to RFID read events and getting RFID data as keyboard input is just an additional mode, which only has the advantage of not needing to do some special programming with such a driver.

Chriss

 

[Mike Gagnon]

Chriss

Then if that is that case I certainly deal with that. Thanks



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[Mandy_crw]

Hi Mike and Chriss… but this type of rfid reader does not work with my application… i dont know why…

 

[Rajesh Karunakaran]

Dear Gagnon / Mandy,

At my place, we have programs to deal with RFID readers. The current one is written in C# (dotnet), not in VFP. I have not tried to port it to VFP so far.

Usually, RFID supplier will give you SDK files (DLLs) along with documentation, sample codes in different languages and most probably with an elaborated application (usually that comes in DotNet I have seen).

First step is to check if there is a documentation came with reader or maybe available publically on internet.

Usually RFID tag can hold different info on different layers built into it and usually RFID readers can be programmed to configure what all information it should read when a tag comes within proximity of a reader. You can program many things including signal strength/sensitivity, beep on read, relay etc etc. All these things depends what the supplier has provided you or maybe, what all things you're allowed to program in their readers.

As for Mandy's query, even though the basic principles are same, suppliers may have their own modifications/differences in reading process and hence one program written according (rather aiming) a particular company's reader may not work with another brand. By the way, I don't have thorough knowledge on deep details of RFID as a whole.

If you can say for what purpose and how you're using it, perhaps I can help you by going through my code here and giving you some clue. I cannot post the code as it is here (company policies) and also because it's not in VFP anyway.

Thanks,
Rajesh

 

[Mandy_crw]

Hi rajesh... Thank you for your answer... i just want to use it like a keyboard input, when an rfid is tapped, it shows the number or input the rfid number... its connected to USB cable but when i tapped the rfid, it doesnt show the number and just have a very long beeps that never stops until usb is plugged out....

 

[Mike Gagnon]

Interesting how my original question became Mandy's post.



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[Rajesh Karunakaran]

Mandy,

Interesting how my original question became Mandy's post.

Yes, Mike is correct.

Mandy, I see that you have the same query in another thread of your own.
Can you please continue in there?

By the way, if you're try to use like a keyboard, can you just open a Notepad and try to scan. That will show you what are the characters the reader reads from your card.

Rajesh

 

[Rajesh Karunakaran]

Hello Mike,

Interesting how my original question became Mandy's post.

I had noticed that this is your post. Still I chose to continue here with Mandy, sorry for that.

By the way, have you come across any good information? I am also interested in knowing deep about dealing RFID from VFP

Rajesh

 

[Mike Gagnon]

Rajesh
I am currently waiting for the manufacturer to send me a demo to test.

https://symcod.com/en/products/indu...puters/w-series-modular-industrial-computers/

I will have to do some testing, and hope that it acts like a keyboard wedge.




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[Mandy_crw]

Hi rajesh... ive done opening a notepad then tried tapping the rfid... nothing appears.. but it beeps long and never stops...

 

[Chris Miller]

Mandy, please stop posting here, this is not your thread.

Chriss