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[aprssig] barcodes, etc.

kc9umr at freqradio.com kc9umr at freqradio.com
Wed Feb 28 16:43:40 UTC 2007


in this case, i would be looking for something to the tune of

/*SEND K9FRT START 9 CAR 43*/

which would result in car 43 put into the "START 9" (stage 9 start) column
at the net control's (K9FRT) computer. (or is the callsign the user and
not the destination?)


With any luck (and only minor modifications) the scanner could be adapted
to work off the same 12V DC power supply that the radio and TNC would
presumably be using.

> Serial barcode scanners are also widely available.  I got mine on eBay for
> half the price of the USB keyboard wedge type that I bought for business
> use.  Seems like no one wants serial scanners anymore.  I think I paid
> around $20, and it's a high-quality Symbol scanner with an excellent scan
> range and width, much better than the cheap LED-based keyboard wedge
> scanner.  The power brick is a little bulky, though.
>
> I modified the Tracker2 command processor so that it'll accept commands
> bracketed in /* ... */.  That way, you can delimit the text string despite
> the fact that it's not possible to encode a carriage return in a barcode.
> Yeah, the scanner can be programmed to send a carriage return after each
> barcode, but that limits your ability to do things with multiple scans.
> For
> example, I could scan both a message and a destination address from
> separate
> barcodes, like this:
>
> /*SEND N1VG-1
> First runner arrived*/
>
> That much you can do with the T2 now.  I think some scanners can also be
> programmed with prefix and suffix text, so you could use a dumb TNC and
> save
> yourself the overhead of the packet source, destination, and path in the
> barcode.
>
> Scott
> N1VG
>
>> With that in mind, the least technical way to transfer bar
>> code information via APRS would seem to be to first, encode
>> it in a meaningful way on the label  When it comes time to
>> scan it, (1) open an APRS message window, selecting the
>> destination station, (2) place the cursor in the message text
>> field, (3) scan the bar code and (4) send the message.
>
>
>
>
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