How to get amount from card reader when swipe card

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Hi I have a card reader(model vega5000s).
I connected it into my pc using USB.

I want to get amount when swipping card using javascript.

But keypress event doesnt fire!!

What I have tried:

I have readed this article and this Link.

Posted 12-Jun-18 1:19am

kave2011

Updated 12-Jun-18 2:36am

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ZurdoDev 12-Jun-18 8:03am

What? Card readers don't provide the amount, the provide the card number.

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OriginalGriff · Accepted Answer · 2018-06-12T02:38:00

Card readers provide a identification of teh card, not an amount in any way - the amount comes from the main software at the server side when it communicated with the transaction service company the store is using to validate accounts and transfer moneys.

I would suggest that the best thing to do would be to contact the manufacturers and ask their tech support: Castle Technology/[^] - but I've not heard of a browser based card processing system and would have thought it unlikely.