[aprssig] Mobile Off-Air Display
david at rushtone.com
Mon Aug 10 14:19:13 CDT 2015
I'll second the recommendation of APRSdroid on an Android tablet. It'll
work easily with online maps, but with a little more effort you can
configure it to work with OpenStreetMap data downloaded to the device,
so it works completely offline (without Internet connection). It's what
I use for balloon chases.
On 2015-08-10 12:11, Dallas Clements via aprssig wrote:
> Several options have been shared so far to help you with your bike
> race. I've used AvMap, WinBooks, Bluetooth TNCs, and soft TNCs. All
> have their merits, but if you're looking for something that will
> be less expensive to procure for multiple assistance vehicles and rest
> stops, I'd recommend simply hooking an Android tablet or phone via
> audio cable to a HT. The app APRSDroid has a connection protocol
> labeled "AFSK via Speaker/Mic" that will decode the received packets
> heard on the radio and overlay them on a map on the Android device's
> screen. The option to use an Offline Street Map is there and with the
> device's built in GPS, you know where you are in relation to the
> objects that you're receiving.
> Simple. Inexpensive.
> If you wanted to transmit, too, I'd recommend a more capable radio
> than a HT, but it sounds like you're just trying to bring situational
> awareness to more people. That being the case, the wattage of the
> device is irrelevant. Depending on your peer group, it's not hard to
> find people who have an older Android device gathering dust in their
> home from the last upgrade cycle or two. That leaves your cost at
> $4.99 for the app and whatever money you spend making cables. I'm
> assuming finding HTs and mag mount antennas to borrow will also not be
> a problem within your local club.
> This setup that I'm describing is the entry level APRS rig that we use
> to get new amateurs in our club exposed to APRS. After they use it for
> a few weeks, they tend to upgrade to something with more transmit
> power. However, for your purposes, it may be ideal.
> Here's the "how-to" we wrote for our club. It has a wiring diagram for
> Wouxun, Baofeng, and some Kenwood HTs.
> Dallas Clements
> ---------- Forwarded message ----------
> From: Charles Bland <root at blandranch.net <mailto:root at blandranch.net>>
> To: aprssig at tapr.org <mailto:aprssig at tapr.org>
> Date: Sun, 9 Aug 2015 17:25:00 -0700
> Subject: [aprssig] Mobile Off-Air Display
> I'd like to get the latest opinion from this group about putting
> together a simple mobile APRS display solution.
> Our local club does a couple of bike events each year. We have an
> ad-hoc network to support our trackers over the course area. I
> have been turning my attention toward broader use of the info. For
> example, our rest stops now have displays, and we run a Public
> Info table so that we can make event participants aware of what we
> do and how we do it.
> I am now turning my attention to our radio operators in the sag
> wagons. For insurance purposes, the bike club provides the cars
> and drivers. The radio op rides shotgun, using a Go-Box that has
> battery assist so that the cigarette lighter adapter isn't doing
> the heavy TX lifting and can be shared for other uses.
> I'd like to have simple, non-transmitting display setup so that
> the operator can "look" around the course as he has need. I'm not
> sure where to start looking for commercial solutions, if there are
> any at all. I also have been wondering, given the abundance of
> R-PI hardware, if a R-PI and display would be enough to run
> something like YACC. A simple RX and antenna would be enough, and
> the package could be small enough to occupy little of the precious
> space in the vehicle and not pose a safety issue. Even nicer if it
> could be on the dash.
> So, what do you folks know? How would you approach such a requirement?
> aprssig mailing list
> aprssig at tapr.org
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