[aprssig] barcodes, etc.
scott at opentrac.org
Wed Feb 28 10:15:04 CST 2007
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:
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
> 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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