AC001 wrote:
> First am a newbie to FlightGear and am throughly enjoying the experience ;-)
>
> Am hacking in pyqt experimenting/researching with sockets (to eventually
> interface with Arudino)
>
> The FG->output to pyqt listening is working great, with no major issues.
>
> However I am having problems with the input side and would appreciate
> some direction.
>
> The issues are.
> 1) can I acknowledge/debug that fg is receiving the input from socket
> 2) unsure about the formatting of the <input><chunk>
> 3) unsure how to format the input variable in the correct way..
>
> below are the various elements snipped in parts
>
> my command line is
>
> /home/flight-sim/flight-gear-9/source/src/Main/fgfs \
> --fg-root=/home/flight-sim/flight-gear-9/data \
> --httpd=9090 \
> --aircraft=A380 \
> --disable-real-weather-fetch --disable-clouds --timeofday=noon
> --fog-disable \
> --generic=socket,out,10,127.0.0.1,6789,udp,mash \
> --generic=socket,in,5,127.0.0.1,6788,udp,mash \
> --trace-write=/sim/gui/dialogs/autopilot/speed-active
>
> and the mash.xml protocol file
>
> <?xml version="1.0"?>
> <PropertyList>
> <generic>
> <input>
> <line_separator>newline</line_separator>
> <var_separator>tab</var_separator>
>
>
> <chunk>
> <name>speed-active</name>
> <type>bool</type>
> <node>/sim/gui/dialogs/autopilot/speed-active</node>
> </chunk>
> </input>
>
> <output>
> <line_separator>newline</line_separator>
> <var_separator>tab</var_separator>
>
> <chunk>
> <name>aileron</name>
> <type>float</type>
> <format>aileron=%03.2f</format>
> <node>/controls/flight/aileron</node>
> </chunk>
>
> <chunk>
> <name>elevator</name>
> <type>float</type>
> <format>elevator=%03.2f</format>
> <node>/surface-positions/elevator-pos-norm</node>
> </chunk>
> ---- snipped------
>
>
> the python code
> # eg "speed-active=true\n" is sent
> datagram = "speed-active=%s\n" % (val)
> print datagram
> self.udpSocket.writeDatagram(datagram,
> QtNetwork.QHostAddress(QtNetwork.QHostAddress.Broadcast), 6788)
>
>
> help would be greatly appreciated
> tia
> pedro
> ac001
>
>
1) Find the property /sim/gui/dialogs/autopilot/speed-active in
property tree (via FG menu or in browser at local port 9090 ). If you
can drive it from external program than all is fine.
2) As I see you are sending data from python in the form like this:
speed-active=0
speed-active=1
speed-active=1
FG does not accepts variable names and expects input in the form
0
1
1
With respect,
Alex
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