[Linux-ham] TNC-PI on Raspberry PI

Mon Feb 3 12:01:18 EST 2014

Folkert, I realized I made a mistake with my last answer to you.   The card I was booting on was not completely set up for the TNC-PI. 
I’m sorry.  I am recovering from eye surgery done last Tuesday.  

I had completely set up the G8BPQ node with two TNC-PI board in i2c mode last Monday (before eye surgery) and then took out that card to back it up.  When I failed to get the back-up to restore onto a new card, I decided to start over on the new card.  But then when i was reading your email I forgot that I hadn’t completed the sequence.  

I put back the card I was using last Monday and ran your commands again.  

Here is another try of the same commands. 
The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Tue Jan 28 00:52:26 2014 from 10.0.0.179
pi at raspberrypi ~ $ uname -r
3.10.25+
pi at raspberrypi ~ $ cat /boot/cmdline.txt
dwc_otg.lpm_enable=0 console=tty1 root=/dev/mmcblk0p6 rootfstype=ext4 elevator=deadline rootwait
pi at raspberrypi ~ $ grep -v -e '^ *$' -v -e '^#' < /boot/config.txt
hdmi_force_hotplug=1

hdmi_force_hotplug=1
config_hdmi_boost=4
overscan_left=24
overscan_right=24
overscan_top=16
overscan_bottom=16
disable_overscan=0
pi at raspberrypi ~ $ 

Tadd Torborg
tadd at mac.com

On Feb 2, 2014, at 2:28 PM, folkert <folkert at vanheusden.com> wrote:

> Tadd,
> 
> Unfortunately I have not gotten the TNC-PI setup to work. I don't use
> bpq so I don't have BPQ32.CFG.
> 
> Regular baycom-modems connected to Linux pcs works fine but the TNC-PI
> with the same radio not so much.
> 
> Situation: transmitting works fine but receiving not at all. I once,
> literally once received a packet (verified with axlisten) but then not
> any more. No idea why.
> 
> Can you tell me what kernel you're running? E.g. the output of:
> 	uname -r
> 
> Also can you show me the output of:
> 	cat /boot/cmdline.txt
> and:
> 	grep -v -e '^ *$' -v -e '^#' < /boot/config.txt
> 
> 
> Regarding the PDF you wrote: looks fine to me!
> 
> On Sun, Feb 02, 2014 at 01:48:09PM -0500, Tadd Torborg wrote:
>> Folkert and the group,
>>  You are way ahead of me.  I hope you can give me a tutorial on how to do PC to PC linking using Ethernet and G8BPQ.  I?m not very good with Linux.  Please send your BPQ32.CFG files.  Thanks. 
>> Can you describe the setup you are using to test?  Do you have a free-range TNC talking to the ?left? PC?  How are you seeing the traffic come out the ?right? PC?  Did you engage a monitoring facility on G8BPQ?  I haven?t gotten so far as to find out how to do that.
>> 
>> My test system is an AEA PK88 TNC on one end, then that is over a short radio link to a TNC-PI plugged into the top of the Raspberry PI, then the 2nd TNC-PI on the same Raspberry PI is hooked to a radio that talks to and listens on 144.39.  Currently this works and I can connect into the node using the web interface and also connect in and out on packet over 144.39.  
>> 
>> I want to build up a 2nd Raspberry PI and use the facility you are working on (AX25UDP?) to link the two together across my desk.  
>> 
>> My intention is to build a multi-county Internet-Free and congestion-free terrestrial VHF/UHF Amateur Radio packet network consisting of at least a dozen stations, all of whom will be full-time network participants with a dedicated link between them.  As of Feb 2, 2014 there is just vapor-ware, what you and I are talking about.  I want to use Internet for configuration only as far as the radio network goes.  We already have Internet as a parallel network.  I think adding Internet paths, users, and data, to a ham radio network is counter-productive.
>> 
>> I would very much like the capability have using a home-computer system as part of the node but where the full-time-up parts of the system are run through Raspberry PI units and dedicated (cheap) radios.  The home-computer can thus be taken off-line without interrupting the network traffic.  I have a solution, I think, that will enable complete dual-radio network nodes, including antennas, to be built for around $400.  Some shipping costs may need to be added.  Some of us already have some of this gear.  I have a source for the GelCel.  We can get 70amp-hours I think which would back up a node for days.  
>> $40  RaspberryPI
>> $10  SD memory card
>> $45  TNC-PI
>> $45  TNC-PI
>> $40  used 2m mobile
>> $20  new Baofeng UHF HT  BF-888S
>> $100 dual-band 2m/440 antenna or pair of yagis
>> $30  coax
>> $20  power supplies for Baofeng and PI
>> $30  used GelCel backup battery
>> $15  charger
>> $10  mike->packet cables.  
>> 
>> I made a PDF of a document I?m working on to describe how to bring up the TNC-PI boards on the Raspberry PI.  I?m writing it for a user who is not particularly familiar with Linux.  I?d appreciate any feedback at all or more text to add.   I posted a PDF of the document on my web server at 
>> http://www.torborg.com/images_for_postings/2014_02_02/007_from_scratch_TNC-PI_on_RaspBerry_PI.pdf
>> I also put up the bpq32.cfg file I?m using on the TNC-PI.
>> http://www.torborg.com/images_for_postings/2014_02_02/tadd_bpq.txt
>> 
>> I usually listen to the 442.15 repeater PL131.8 in Chatham county (covers the triangle very well) as well as 146.52 from north Raleigh and 53.45 repeater, also in Chatham county.  
>> 
>> Tadd Torborg
>> tadd at mac.com
>> 
>> 
>> On Jan 30, 2014, at 6:00 PM, folkert <folkert at vanheusden.com> wrote:
>> 
>>> Hi,
>>> 
>>> Ok I've got ax25udp working: beacons I send into the bpq interface on
>>> the left come out on the right (= other pc).
>>> 
>>> On the pc at the left where an ax25udp instance running, there's also a
>>> baycom modem connected (which shows itself as:
>>> 	bcsf0     Link encap:AMPR AX.25  HWaddr FH1GOU-1).
>>> 
>>> What I'm wondering now is: how can I bridge or route traffic between my
>>> baycom modem and the bpq/axudp setup? And can I rate-limit that?
>>> 
>>> 
>>> regards,
>>> 
>>> Folkert van Heusden
>>> 
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> 
> Folkert van Heusden
> 
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