[Hackrf-dev] TX Trouble

[Simon Kennedy]

Hi Brian

As you can see from the error message the flow graph is unable to establish
the connection to the HackRF. Obviously this could be as simple as not
having the device plugged in to the computer. I'm going to discount this
:-) but just double check by running dmesg immediately after plugging it in
and you should see reference to the HackRF connecting.

More likely is that the device string is wrong. If you have the latest
firmware loaded (run hackrf_info to check) dated 2017 then reference the
HackRF like 'hackrf=<serial number>'

If not, and I am casting my memory back here, I seen to remember a problem
using hackrf=0 but just try 'hackrf' on its own or 'hackrf=1'

HTH
Simon.

On 15 Oct 2017 03:18, "Andrew Rich" <vk4tec at tech-software.net> wrote:

> Try a simple fm Tx
>
> Sent from my iPhone
>
> > On 15 Oct 2017, at 12:04 pm, wiemeyer at nehp.net wrote:
> >
> > Hi Gang,
> >
> > I'm trying to TX, specifically I'm trying to implement the Hack RF
> > tutorial video about writing a waveform (like a car door opener) to file,
> > and then transmitting it later from file.
> >
> > Here's a screen shot of my flowgraph and the error I'm getting.
> >
> > I've seen a forum page on it somewhere saying to check the HackRF serial
> > number.  That's not the problem.  The help page also said something about
> > a USB port and power sharing, that I didn't really understand.  It said
> to
> > look for a certain file:  /tlp or /tpl.  Anyway, I didn't have that file
> > on my computer.
> >
> > Any advice?
> >
> > Thanks,
> >
> > Brian
> > <Screenshot from 2017-10-13 20-51-16.png>
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