[aprssig] Bluetooth RS232 adapters to run a TNC?

Scott Miller scott at opentrac.org
Wed Sep 14 17:41:07 CDT 2016

WiFi definitely has its challenges there.  WiFi Direct doesn't seem to 
be widely used yet.  Multiple WiFi connections isn't well-supported.  
Infrastructure mode is easier, where you have an existing AP.


On 9/14/2016 2:02 PM, Fred Hillhouse wrote:
> Concerning Wi-Fi, connecting with a smartphone may provide varying 
> results. I have a BlackVue dash cam with Wi-Fi. If I connect directly 
> to it with my phone (Samsung S5) then all phone data exchanges attempt 
> to use Wi-Fi and fail. It seems the dash cam resembles a hot spot to 
> the phone.
> I ended up with a hot spot for the dash cam. I turn off Wi-Fi on my 
> phone and connect using my data. There may be an alternate solution 
> but I haven’t found it yet.
> Just a heads up!
> Best regards,
> Fred N7FMH
> *From:*aprssig [mailto:aprssig-bounces at tapr.org] *On Behalf Of *Scott 
> Miller
> *Sent:* Wednesday, September 14, 2016 3:42 PM
> *To:* aprssig at tapr.org
> *Subject:* Re: [aprssig] Bluetooth RS232 adapters to run a TNC?
> Yes, and there are various ways to pair devices (usually involving a 
> pushbutton or jumpers), but you're still going to need power to both 
> devices, so it's not that big a gain for many users.
> My next generation trackers will have WiFi as well, so for the host 
> connection I'm hoping to get more users to move to an AGWPE type TCP 
> connection.
> Scott
> N1VG
> On 9/13/2016 6:53 PM, Bob Burns W9BU wrote:
>     At the risk of hijacking this thread, would it be possible to
>     implement a Bluetooth connection between a TNC and a GPS receiver?
>     In other words, would it be possible to use Bluetooth to eliminate
>     the wired RS232 serial connection between the TNC and the GPS
>     receiver? Since neither device would have a user interface that
>     understands Bluetooth, how would the pairing be configured?
>     Bob…
>     *From:*aprssig [mailto:aprssig-bounces at tapr.org] *On Behalf Of
>     *Byon Garrabrant
>     *Sent:* Tuesday, September 13, 2016 12:30 PM
>     *To:* Jim (List) <jim.list at stuckinthemud.org>
>     <mailto:jim.list at stuckinthemud.org>
>     *Cc:* TAPR APRS Mailing List <aprssig at tapr.org>
>     <mailto:aprssig at tapr.org>
>     *Subject:* Re: [aprssig] Bluetooth RS232 adapters to run a TNC?
>     I have the TT4BT, which connects to the DB-9 serial port of the
>     TinyTrak4 TNC and converts it to BT.  It takes power from the 5V
>     on the DB-9 pin 4, so if your TNC doesn't have that, you will need
>     to find a way to power it.  But as long as your TNC baud rate is
>     19200, it should be fairly plug and play.  With some work, it can
>     be changed to other baud rates, too.
>     http://byonics.com/tinytrak4/
>     Byon
>     On Sun, Sep 11, 2016 at 6:12 AM, Jim (List)
>     <jim.list at stuckinthemud.org <mailto:jim.list at stuckinthemud.org>>
>     wrote:
>         Does anyone have experiences of using a Bluetooth<>RS232
>         adapter to communicate with a TNC?
>         With the prevalence of Windows pad devices with no USB ports,
>         I’m sure people have done this but Google can’t find anything
>         (apart from loads of the units themselves).
>         Specific application will be a Microsoft Surface running
>         AGWPE, talking to a Kantronics TNC.
>         Jim, G1HUL
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