[OZAPRS] dire wolf platform
Glen English VK1XX
glenlist at pacificmedia.com.au
Thu Nov 9 20:18:29 AEDT 2017
For my Direwwolf I use a ODROID C2 or ODROID C1 or XU4. Ginini has an
XU4 because I want to move it somewhere.
the GPIO is easily accessed, like Pi. I just have the PTT GPIO line
driving a transistor via a single resistor (and resistor to ground to
cover the reset / HiZ condition)
and I use a $10 USB sound device. any seem to work.
and one of those 5V switchers for $3 with some ceramic capacitors in
parallell with the electros.
I HAVE ACTUALLY made a daughter board for ODROIDs to drop onto.. has USB
audio chip, PTT lines, DCD lines, 5V switchmode power supply on it and
slots in a hammond extrusion box..
just got to get it into my SMT line and build some. I have a stencil for
it, just need to pull my finger out.... designed for this job.
I dont think most users need audio isolation. Just make sure the ground
of the radio goes to the ground of the computer with a wire . I dont
know why people have so many issues with earth loops and ground hums, I
just have a wire between my radio neg and the PC case screw at
home....(as the audio cards are often floating)
g
On 9/11/2017 8:10 PM, Mark Jessop wrote:
> Hi Glen,
>
> I guess the bit that's missing is a nice hat/shield/cape/whatever to
> go on something like a raspberry pi to handle the radio
> interfacing/isolation/keying/etc.
>
> Unless you know of such a device?
>
> 73
> Mark VK5QI
>
> On Thu, Nov 9, 2017 at 7:08 PM, Glen English VK1XX
> <glenlist at pacificmedia.com.au <mailto:glenlist at pacificmedia.com.au>>
> wrote:
>
> Carlos
>
> Have a look at dire wolf
>
> you can run it on an $20 ARM platform....(like I do)
>
> drawing 1/2 a watt....
>
> and it does 300 baud HF.....
>
> real easy
>
> it's what ginini will be shortly, and isaacs... and and and
>
>
> On 9/11/2017 7:57 PM, Carlos Peco-Berrocal wrote:
> > Thanks Andrew/Mark,
> >
> > Yep, I found that APRSDroid does 1200 bps only. I will explore the
> > OpenTrackerUSB option, sounds interesting to me !
> >
> > 73
> > Carlos VK1EA
> >
> >
> > On 11/9/17, Mark Jessop <lenniethelemming at gmail.com
> <mailto:lenniethelemming at gmail.com>> wrote:
> >> Looking through the APRS Droid options, I don't see the ability
> to generate
> >> 300 baud APRS (call it whatever you want, FSK or AFSK) output.
> >> In fact, there are no baud rate settings at all, just the
> choice between
> >> 'Internet' (APRS-IS), and 'Audio' (which I'm assuming is 1200
> baud FSK,
> >> intended for use with a FM transceiver).
> >>
> >> There appears to be an iPhone/iPad application 'APRSPro' which
> may do 300
> >> baud APRS, but I a cursory google search hasn't found an
> equivalent Android
> >> application.
> >>
> >> Within my car I've used an OpenTrackerUSB configured into 300
> baud mode,
> >> hooked into my Codan NGT SRx. These units are TX only however.
> At about
> >> AUD$50-60, it's fairly cheap way of getting HF APRS beaconing
> going.
> >> For a receiver, I'd probably recommend using Direwolf.
> >>
> >> 73
> >> Mark VK5QI
> >>
> >>
> >> On Thu, Nov 9, 2017 at 6:20 PM, Andrew Rich
> <vk4tec at tech-software.net <mailto:vk4tec at tech-software.net>>
> >> wrote:
> >>
> >>> AFSK on Ssb results in fsk
> >>>
> >>> Sent from my iPhone
> >>>
> >>> On 9 Nov 2017, at 6:17 pm, Carlos Peco-Berrocal
> <carlos.peco at gmail.com <mailto:carlos.peco at gmail.com>>
> >>> wrote:
> >>>
> >>> Hi Andrew,
> >>>
> >>> For HF as well ?
> >>>
> >>> I thought it was AFSK tones for VHF only
> >>>
> >>> cheers
> >>> Carlos
> >>>
> >>>
> >>>
> >>> Le jeudi 9 novembre 2017, Andrew Rich
> <vk4tec at tech-software.net <mailto:vk4tec at tech-software.net>> a écrit
> >>> :
> >>>> Aprs droid
> >>>> Google
> >>>>
> >>>> Sent from my iPhone
> >>>> On 9 Nov 2017, at 5:38 pm, Carlos Peco-Berrocal
> <carlos.peco at gmail.com <mailto:carlos.peco at gmail.com>>
> >>> wrote:
> >>>> Thanks Peter,
> >>>>
> >>>> Any suggestion about how to generate APRS-FSK with
> android/windows ?
> >>>>
> >>>> cheers
> >>>> Carlos
> >>>>
> >>>>
> >>>> Le jeudi 9 novembre 2017, Peter Wicklein <vk3tbn at hotmail.com
> <mailto:vk3tbn at hotmail.com>> a écrit :
> >>>>> Mostly FSK and a few stations using robust packet
> >>>>>
> >>>>> Regards
> >>>>>
> >>>>> Peter
> >>>>>
> >>>>> VK3TBN
> >>>>>
> >>>>>
> >>>>>
> >>>>> Sent from my Windows 10 phone
> >>>>>
> >>>>>
> >>>>>
> >>>>> ________________________________
> >>>>> From: OZAPRS <ozaprs-bounces at aprs.net.au
> <mailto:ozaprs-bounces at aprs.net.au>> on behalf of Carlos
> >>> Peco-Berrocal <carlos.peco at gmail.com
> <mailto:carlos.peco at gmail.com>>
> >>>>> Sent: Thursday, November 9, 2017 4:17:17 PM
> >>>>> To: Australian APRS Users
> >>>>> Subject: [OZAPRS] Status of the HF network ?
> >>>>>
> >>>>> Hi,
> >>>>>
> >>>>> A couple of questions:
> >>>>>
> >>>>> - What is the current status of the HF APRS network ? is
> people using
> >>>>> FSK or that is something of the past and everybody moved to
> PSK63 or
> >>>>> the likes of ?
> >>>>>
> >>>>> - Which software do you recommend for HF APRS operation
> using a tablet
> >>>>> (windows/android)
> >>>>>
> >>>>> thanks,
> >>>>> Carlos VK1EA
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