On 31/01/2019 15:22, DK7FC wrote:
> Hello dear GPS experts,
> 
> I'm still struggling with my NEO-7M and vlfrx-tools. Instead of the
> standard ucenter software i use my Raspi and vlfrx-tools to configure
> the module. Using the vtubx
> <http://abelian.org/vlfrx-tools/notes.html#vtubx> tool, i can configure
> the time pulse as expected, for example
> *vtubx -P 1e-1 -S /dev/ttyAMA0*
> leads to a blinking LED with 100 ms on-time. So the communication works
> fine.
> However,with
> *vtubx -F 10 -S /dev/ttyAMA0* or *vtubx -F 1,10e1 -vv -S /dev/ttyAMA0*
> the LED gets and stays dark, i.e. no frequency output.
> 
> Now i tried to use the old u-center software and there i can configure
> the TP output as expected to a frequency of say 20 Hz and there the LED
> is indeed blinking.
> 
> Does someone have tried to use vtubx and have some experience? What am i
> doing wrong?
> 
> 73, Stefan
> 
> 
> 
Stephan,

Here on a Centos box (yes I know ...) it all works as expected (after I
got the dependencies resolved)

vtubx -F 10 -S /dev/ttyACM0 gives a nice fast flash rate of the LED

vtubx -F 1 -S /dev/ttyACM0 puts it back ...

Regards

Nick
M0HGU
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