Thank's everybody for the answers.
Colin, if not too dificult for you, i'd like if you can send me the docs you have regarding credit cards. Rodrigo on 2/6/03 2:08 PM, Colin Holgate at [EMAIL PROTECTED] wrote: >> Does anyone knows if it's possible interact director with devices like >> barcode reader and credit card machines? How it can be done? there's anybody >> else around with crazy ideas like this? :-) > > > Mostly ignore the other two posts. You can get USB barcode and credit > card readers, they plug into a USB port (on any platform that > supports USB) and work right away, without any Xtras. The numbers > coming from a barcode exactly match what you can read on the label. > You can configure the barcode reader to put characters before or > after that, so for example you could append a return character, and > then just watch for a return coming in. If you choose not to use a > return, you would probably need to watch letters coming in and try to > spot when the end of the number is reached, possibly by timing how > long it was since the last letter came in. > > Credit cards are a bit tougher, as there are two track and three > track magnetic strips. There are definitions for both, so it is > possible to get the person's first and last name, and the card > number, from the right place in the stream of text you get. > > If you have a client who has existing serial barcode readers, then > you might need to get into serial Xtras, etc, but if you're starting > from scratch it would be worth getting a USB one, and not have any of > that hassle. > > BTW, the hardest part of all of this is how to deal with regular > keyboard input, how can you tell whether it's a user typing or a > barcode coming in? I've used both barcode and credit card at the same > time, and got around the keyboard entry part by having that as an on > screen touch keyboard, which doesn't involve the normal keyboard at > all, leaving all keyboard input to be coming from the two devices. > > I have info somewhere on the format for a credit card if you need it. > [To remove yourself from this list, or to change to digest mode, go to > http://www.penworks.com/lingo-l.cgi To post messages to the list, email > [EMAIL PROTECTED] (Problems, email [EMAIL PROTECTED]). Lingo-L is > for learning and helping with programming Lingo. Thanks!] > -- [To remove yourself from this list, or to change to digest mode, go to http://www.penworks.com/lingo-l.cgi To post messages to the list, email [EMAIL PROTECTED] (Problems, email [EMAIL PROTECTED]). Lingo-L is for learning and helping with programming Lingo. Thanks!]
