[hpsdr] PTT on Remote

[w3sz73]

If you have trouble writing an app to do this let me know and I will write a small app to send UDP on/off signals to your Arduino and send it to you.

73,

Roger
W3SZ

Sent from my iPad

> On Mar 9, 2016, at 1:08 AM, Bent Andersen <eskolin at gmail.com> wrote:
> 
> 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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