Re: [Paparazzi-devel] downlink only

[Martin P]

A trivial cause, once again. 

On Sunday, the ground station modem fell down because of a too short USB cable 
and one of the connectors which hold the Xbee broke off. The one that I had 
patched before because I had no uplink. Removed the remainders and soldered a 
new connector in place. 

Now it looks different: 
When I click a strip button, the left middle LED on the Xbee board flashes 
briefly. And the servos rattle (interference!!!). When I click a radio button 
in the settings tab, it takes a moment and then gets activated. 

So I will put the holding point back in. 

It's the third time in this project that I had a contact problem, third time it 
drove me insane. Good luck that the modem fell down, I wouldn't have found it. 

Greetz, Martin 

-------- Original-Nachricht --------
> Datum: Mon, 27 Jul 2009 22:46:08 +0200
> Von: "Martin P" <address@hidden>
> An: address@hidden
> Betreff: Re: [Paparazzi-devel] downlink only

> Hi, 
> 
> I do not intend to do any settings via the transmitter. 
> 
> However, I do not seem to have 2-way-communication via the modems.
> Although I saw something with the scope, I am not able to use neither the 
> settings
> tab in the ground station nor the settings dialog from the tools menu. The
> latter shows an empty window. 
> 
> On the field I used a modified flight plan which does not stop at the
> holding point. First of all, uplink seems not to work an secondly, most of the
> time I am alone on the field. 
> 
> Usually, when ground testing, the throttle reacted to the stick in AUTO1. 
> Yesterday I switched to AUTO1 and the plane throtteled up and took off
> before I expected (I use a landing gear). Switched to MANUAL and climbed, then
> back to AUTO1. No throttle. Probably this is because I put the
> vmode="throttle" in the takeoff block to get executed anyway. 
> 
> I havent't seen any vmode statements other than specifying "throttle".
> What are the valid values for vmode? 
> Could I automaitcally set the vmode to pitch in AUTO1? 
> 
> Managed to land manually, in spite severe radio interference. Radio
> interference in spite having changed the receiver cable to a shielded wire. 
> 
> So, I am still struggling and learning. Every help is greatly welcome. 
> 
> Greetings, Martin 
> 
> -------- Original-Nachricht --------
> > Datum: Fri, 24 Jul 2009 19:00:32 +0200
> > Von: Pascal Brisset <address@hidden>
> > An: address@hidden
> > Betreff: Re: [Paparazzi-devel] downlink only
> 
> > Hi,
> > 
> > Martin P wrote:
> > > I was wrong, I do have 2-way communication. Looked at pins 2 and 3
> with
> > the scope. (Could have done that earlier) 
> > >
> > > Then I do not know why I was stuck in holding point block (before I
> > commented it out). 
> > >
> > > With or without 2-way-communication, I am still interested in flying
> > without GCS interaction. Which means that, for the time being, I can
> only
> > follow a pre-determined track and then (attempt to) land. 
> > >   
> >  The code to do a setting from RC channel is still there:
> > 
> >
> http://paparazzi.enac.fr/wiki/Telemetry#R.2FC_Transmitter_Data_Uplink_.28Obsolete.29
> > 
> >  But.
> >  It has not been tested for months (years ?).
> >  We will remove it asap
> > 
> > --Pascal
> > 
> > 
> > 
> > > Greetz, Martin
> > > -------- Original-Nachricht --------
> > >   
> > >> Datum: Mon, 20 Jul 2009 23:11:58 +0200
> > >> Von: "Martin P" <address@hidden>
> > >> An: address@hidden
> > >> Betreff: [Paparazzi-devel] downlink only
> > >>     
> > >
> > >   
> > >> Hello, 
> > >>
> > >> it seems that I have a common problem: GCS doesn't send to the plane.
> > >> Removing the datalink section didn't help.
> > >>
> > >> Anyway, I am not so much interested in the uplink. When I am alone I
> > >> cannot watch the plane and the computer screen at the same time. I
> know
> > that
> > >> Pascal Brisset strongly advises against removing the holding point
> > block from
> > >> the flight plan, but I might do just that. 
> > >>
> > >> My starting procedure would be like this: 
> > >> Switch on the transmitter and switch to MANUAL, throttle off. 
> > >> Power the plane. 
> > >> Wait for GPS and do GeoInit. 
> > >> Instantly go to Takeoff (a beep or LED signal would be nice). 
> > >> As I am still in MANUAL, the propeller doesn't spin. 
> > >>
> > >> I don't know how to go on from this point. When I switched to AUTO2
> > >> (without propeller, for safety) I expected the motor to start, but it
> > didn't.
> > >> Does the autopilot wait for a "launch" command which it doesn't get?
> > Does the
> > >> autopilot wait until I have stared manually? 
> > >>
> > >> Can you take off from the lawn (with a landing gear) or do you need
> to
> > >> throw the plane? 
> > >>
> > >> Greetings, Martin 
> > >>
> > >>
> > >> _______________________________________________
> > >> Paparazzi-devel mailing list
> > >> address@hidden
> > >> http://lists.nongnu.org/mailman/listinfo/paparazzi-devel
> > >>     
> > >
> > >
> > > _______________________________________________
> > > Paparazzi-devel mailing list
> > > address@hidden
> > > http://lists.nongnu.org/mailman/listinfo/paparazzi-devel
> > >   
> > 
> > 
> > 
> > _______________________________________________
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> 
> 
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