Re: [Raspberry_Pi_4-Ham_RADIO] Re: PI TNC - progress report.
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On Sep 21, 2012, at 5:10 PM, Matthew Pitts <daywalker_blade_2004@...> wrote:
Either option would be satisfactory for me. Keep up the good work on this.
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From: gm8bpq <john.wiseman@...>;
Subject: [Raspberry_Pi_4-Ham_RADIO] Re: PI TNC - progress report.
Sent: Fri, Sep 21, 2012 12:28:19 PM
I'm discussing with the maker of the TNC-X the possibility of him making and selling the boards. If that doesn't come off, I'll at least make the PCB and software availabale, so you can build your own.
--- In Raspberry_Pi_4-Ham_RADIO@yahoogroups.com, ve2hom Pascal <ve2hom@...> wrote:
> Hi John,
> This sound very cool, give us news about your project. Do you plan
> to make these board available to sell ?
> 73 de Pascal
> Le 20/09/12 16:27, John Wiseman a écrit :
> > Hi,
> > For those fairly new to the group, I have been working on a TNC for
> > use with the pI that is the same size as the pi and plugs into the
> > expansion header. The prototype was a TNC-X, with a 26 way header
> > superglued to board. There is a photo of it on the home page of this
> > group.
> > I've now received the first PCB's, and built a couple. There are
> > photos at https://dl.dropbox.com/u/31910649/S1300001.JPG and
> > https://dl.dropbox.com/u/31910649/S1300002.JPG. The TNC is largely
> > based on the TNC-X, but I've replaced the serial port with an i2c
> > connection, so more than one can be connected to the PI. The current
> > board has a mini-DIN radio connector, but I find mini-DIN plugs very
> > difficult to wire, and the connector is just too high to stack
> > properly, so the final version will probably have a DB9. I've written
> > a linux driver that takes the i2c data stream, and converts to a pty
> > that can be used with the normal linux ax.25 kissattach program. All
> > this seems to be working.
> > I've a couple of developments in the pipeline. One is to replace the
> > MX 614 modem, hopefully with a PIC based solution. Although the 614
> > works very well, it is relatively exensive, and only works at 1200
> > baud. I hope to be able to run at 300 for HF use. I've also bought a
> > couple of RFM22B modules. These are tiny 100 mW 434MHz data
> > tranceivers - see
> > http://www.sparkfun.com/datasheets/Wireless/General/RFM22B.pdf. I plan
> > to do a version of the TNC using this module.
> > A version using the FX 489 modem for 9600 baud links is planned, nut I
> > haven't started work on that yet.
> > 73, John G8BPQ
- Well done John!!!
I hope that you will make these available to the community. Such an incredible idea you have. Can't wait to hear about your progress of your project.
--- In Raspberry_Pi_4-Ham_RADIO@yahoogroups.com, "John Wiseman" <john.wiseman@...> wrote:
> They are all working here at the moment, but dropbox can be a bit
> tempermental at times! If you cant get them after a few attempts let me
> konw, and I'll find somewhere else to upload them.
> 73, John
> From: Raspberry_Pi_4-Ham_RADIO@yahoogroups.com
> [mailto:Raspberry_Pi_4-Ham_RADIO@yahoogroups.com] On Behalf Of Perry
> Sent: 05 November 2012 18:40
> To: Raspberry_Pi_4-Ham_RADIO@yahoogroups.com
> Subject: Re: [Raspberry_Pi_4-Ham_RADIO] PI TNC - progress report.
> The 0573.png is a dead link for me.
> Sent from my iPad
> On Nov 5, 2012, at 7:50 AM, "Mike" <mmelnik1@...> wrote:
> Very nice job John.
> Mike N9PMO
> <http://www.n9pmo.com> www.n9pmo.com
> -----Original Message-----
> From: <mailto:Raspberry_Pi_4-Ham_RADIO%40yahoogroups.com>
> [mailto: <mailto:Raspberry_Pi_4-Ham_RADIO%40yahoogroups.com>
> Raspberry_Pi_4-Ham_RADIO@yahoogroups.com] On Behalf Of John
> Sent: Monday, November 05, 2012 9:12 AM
> To: <mailto:Raspberry_Pi_4-Ham_RADIO%40yahoogroups.com>
> Subject: [Raspberry_Pi_4-Ham_RADIO] PI TNC - progress report.
> Hi folk,
> The production boards have now arrived, and I've built a couple of them,
> Here are some photos of a pi with two TNCs attached.
> As I mentioned in a post earlier today, the RFM22 prototypes are
> working, and I hope to have the production boards in 2-3 weeks.
> 73, John G8BPQ
> For those new to the group, I have been working on a TNC for use with
> the pI that is the same size as the pi and plugs into the expansion
> header. The prototype was a TNC-X, with a 26 way header superglued to
> board. There is a photo of it on the home page of this group.
> I now have two TNC's running, and can connect between them. See photo at
> https://dl.dropbox.com/u/31910649/IMGP0573.png. This show the prototype
> - the production boards will have a DB9 instead of the Mini-DIN radio
> connector. A batch of production boards has been ordered, and should be
> here in 2-3 weeks.
> I've also built a couple of units using the RMF22B 100 mW 434 Mhz
> tranceiver model. They both transmit - I now need to get the receive
> side working. There is a photo at
> I looked at the higher powered (500 mw) RMF12BP, and ordered a couple
> for experiments. But when I looked into the module in more detail I
> found it was not compatible with the RFM22B, and is less flexible and
> more difficult to program. I've since found the RFM23BP, which is a 1
> watt unit that is compatible with the RFM22B, so I've ordered a
> couple of them for testing, and designed a board that will take either
> the 22B or the 23BP. Although it is primarily indended for use with the
> PI, it will also have an async port, so it can be used as a standalone
> KISS TNC/Radio.
> 73, John G8BPQ