[aprssig] Bluetooth RS232 adapters to run a TNC?

Thu Sep 15 09:56:54 EDT 2016

I recently changed from a ‘fixed’ data plan to a ‘unlimited’ data plan and lost the hot spot ability on my smartphone (AT&T). I had to buy a hot spot device with a ‘fixed’ data plan to recover the loss.

Best regards,

Fred N7FMH

From: aprssig [mailto:aprssig-bounces at tapr.org] On Behalf Of Lynn W. Deffenbaugh (Mr)
Sent: Wednesday, September 14, 2016 5:47 PM
To: aprssig at tapr.org
Subject: Re: [aprssig] Bluetooth RS232 adapters to run a TNC?

That has been my experience as well.  The only way I've been able to use a local WiFi connection and still have access to the Internet on my phone is to enable the HotSpot feature on the phone and have the local WiFi device connect to the phone.  TCP/IP doesn't care how the WiFi connection was made, and as long as you have a way to find out the IP address of the local device, apps on the phone can connect to ports on the local device without chewing up data.

Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32

PS.  I've been experimenting with this using ESP8266 WiFi chips that I've enabled for APRS-IS communications.  You can see them as KJ4ERJ-E* on aprs.fi.

On 9/14/2016 5:02 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)  <mailto:jim.list at stuckinthemud.org> <jim.list at stuckinthemud.org>
Cc: TAPR APRS Mailing List  <mailto:aprssig at tapr.org> <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> 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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