[hpsdr] PTT on Remote

[Bent Andersen]

HI Roger

Ok .... I can use a FTDI RS232 module and make it as a ppt-module that is
ok, I will try it out later today...

then I have to figure out how to control my local "com/usb-port" at my
local PC and let it controll the PTT
at powersdr at the remote,

73" Bent

2016-03-09 6:49 GMT+01:00 Roger Rehr <w3sz73 at gmail.com>:

> Hi Bent,
>
> I use a USB-Serial adapter with one side of a footswitch connected to
> Pin 1 [carrier detect] through a 10K resistor and the return from the
> footswitch to Pin 7 [RTS], with RTS always high.
>
> There is some more detail on page 22 of this pdf file:
> http://www.nitehawk.com/w3sz/W3SZ_OpenHPSDR_for_VHF_UHF_Microwave3pt0.pdf
>
> But to do that you have to have software written to take advantage of
> such a switch.
>
> Lacking such software, an Arduino with an Ethernet shield [or any other
> SBC with similar IO capability] at the remote site would be a nice and
> simple way to do it.
>
> At the client end you could have either a software switch/button on the
> computer screen or a hardware switch hooked up as I described first in
> this email [or both, as I do here] causing a simple program at the
> client end to send the signal to the remote SBC to activate the PTT.
> I've used UDP over a multi-mile wireless link between my home and my
> remote station and have had no problems with dropped packets / lost
> commands / etc.
>
> I am not at all current regarding the details of the new openHPSDR
> protocol / firmware / software that has been in the works but I would
> be surprised if the remote capability you seek is not included
> somewhere in those offerings.  But with Arduino Uno R3 equivalents
> available from China for less than 4 USD with free shipping, there is
> no need to wait and nothing lost if you implement your solution and
> then the new openHPSDR offerings render it unnecessary shortly
> thereafter.
>
> 73,
>
> Roger Rehr
> W3SZ
>
> On Wed, 9 Mar 2016 06:03:51 +0100
> Bent Andersen <eskolin at gmail.com> wrote:
>
> > ***** High Performance Software Defined Radio Discussion List *****
> >
> >
>
>
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