Az.Alt.: LMX200 with arduino.

[303055]

Hi guys,

I tried then search on the telescope plugins the commands: GA # and: GZ # for the altitude coordinates and Azimuth of an object, but they do not seem present. I use a telescope Dobson type, and have to do the math to pass in equatorial and vice versa is counter productive knowing that stellarium calculates..

Why are these orders not present?

thx :)

[gzotti]

Because you have not sent your patches yet :-)

[303055]

I'll try to do it ^^ But I'm not a coding pro: p

it is enough that I modify this file? https://github.com/Stellarium/stellarium/blob/master/plugins/TelescopeControl/src/Lx200/Lx200Command.cpp

thx

[gzotti]

I think you should extend the protocol for all instruments. The original developer of the telescope plugin has unfortunately left the project, and I don't know who could test your development.

Maybe somebody else can answer this?

[303055]

Ah, if anyone can show me, I want to :) I saw for example:

---

bool Lx200CommandGetRa::writeCommandToBuffer(char &p, char end) { if (end-p < 5) return false;

  // get RA:
*p++ = '#';
*p++ = ':';
*p++ = 'G';
*p++ = 'R';
*p++ = '#';
has_been_written_to_buffer = true;
return true;

}

int Lx200CommandGetRa::readAnswerFromBuffer(const char &buff, const char end) { if (buff < end && *buff=='#') buff++; // ignore silly byte

if (end-buff < 8)
    return 0;

bool long_format = true;
int ra;
const char *p = buff;
ra = ((*p++) - '0');
ra *= 10;
ra += ((*p++) - '0');
if (*p++ != ':')
{
    #ifdef DEBUG4
    *log_file << Now()
              << "Lx200CommandGetRa::readAnswerFromBuffer: "
                 "error: ':' expected"
              << endl;
    #endif
    return -1;
}

ra *=  6; ra += ((*p++) - '0');
ra *= 10; ra += ((*p++) - '0');
switch (*p++)
{
    case ':':
        ra *=  6; ra += ((*p++) - '0');
        ra *= 10; ra += ((*p++) - '0');
        if (end-buff < 9)
            return 0;
        break;

    case '.':
        ra *= 10; ra += ((*p++) - '0');
        ra *= 6;
        long_format = false;
        break;

    default:
        *log_file << Now()
                  << "Lx200CommandGetRa::readAnswerFromBuffer: "
                     "error: '.' or ':' expected"
                  << endl;
        return -1;
}

if (*p++ != '#')
{
    *log_file << Now()
              << "Lx200CommandGetRa::readAnswerFromBuffer: "
                 "error: '#' expected"
              << endl;
    return -1;
}

#ifdef DEBUG4
*log_file << Now()
          << "Lx200CommandGetRa::readAnswerFromBuffer: "
          << "RA = "
          << qSetPadChar('0')
          << qSetFieldWidth(2)  << (ra/3600)
          << qSetFieldWidth(0) << ':'
          << qSetFieldWidth(2) << ((ra/60)%60)
          << qSetFieldWidth(0) << ':'
          << qSetFieldWidth(2) << (ra%60)
          << qSetFieldWidth(0) << qSetPadChar(' ')
          << endl;
#endif

buff = p;
server.longFormatUsedReceived(long_format);
server.raReceived((unsigned int)floor(ra * (4294967296.0/86400.0)));
return 1;

}

void Lx200CommandGetRa::print(QTextStream &o) const { o << "Lx200CommandGetRa"; }

---

I can copy it and replace in GA? and change the code after?

---

bool Lx200CommandGetRa::writeCommandToBuffer(char &p, char end) { if (end-p < 5) return false;

  // get RA:
*p++ = '#';
*p++ = ':';
*p++ = 'G';
*p++ = 'A';
*p++ = '#';
has_been_written_to_buffer = true;
return true;
 .....

---

thx

[sferixx]

303055 Hello! Could You tell me did You make it (the plugin ehacement) and is it working or not i need it in the same purpose as you im building arduino scope and i would be very gratefull if i could skip the math.

[gzotti]

It seems some extensions to the telescope control protocols could be implemented for and by somebody with alt-azimuthal telescopes like Dobsons modified with Arduino-based control devices. Now, who wants to do sferixx's homework and develop support for some reference DIY kit?

[alex-w]

This is a good task for the community to participate in the contribution into Stellarium. Who wants to help us?

[huntflex]

Hi! Very new to this codebase (actually just cloned the repo today) but I'd like to try to tackle this issue if that's ok. It might take some time.

[gzotti]

Sure, go ahead. You will only have to extend the TelescopeControl plugin. If possible, all telescope models will have to support the protocol. I cannot test any, though.