lx200telescope.cpp

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/*
 * Standard LX200 implementation.
 
   Copyright (C) 2003 - 2018 Jasem Mutlaq ([email protected])
   Minor changes Copyright (C) 2021 James Lancaster
 
   This library is free software;
   you can redistribute it and / or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation;
   either
   version 2.1 of the License, or (at your option) any later version.
 
   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY;
   without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.
 
   You should have received a copy of the GNU Lesser General Public
   License along with this library;
   if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110 - 1301  USA
 */
 
#include "lx200telescope.h"
 
#include "indicom.h"
#include "lx200driver.h"
 
#include <libnova/sidereal_time.h>
 
#include <cmath>
#include <memory>
#include <cstring>
#include <unistd.h>
#include <time.h>
 
/* Simulation Parameters */
#define LX200_GENERIC_SLEWRATE 5        /* slew rate, degrees/s */
#define SIDRATE  0.004178 /* sidereal rate, degrees/s */
 
LX200Telescope::LX200Telescope() : GI(this), FI(this)
{
}
 
void LX200Telescope::debugTriggered(bool enable)
{
    INDI_UNUSED(enable);
    setLX200Debug(getDeviceName(), DBG_SCOPE);
}
 
const char *LX200Telescope::getDriverName()
{
    return getDefaultName();
}
 
const char *LX200Telescope::getDefaultName()
{
    return static_cast<const char *>("Standard LX200");
}
 
 
bool LX200Telescope::initProperties()
{
    /* Make sure to init parent properties first */
    INDI::Telescope::initProperties();
 
    IUFillSwitch(&AlignmentS[0], "Polar", "", ISS_ON);
    IUFillSwitch(&AlignmentS[1], "AltAz", "", ISS_OFF);
    IUFillSwitch(&AlignmentS[2], "Land", "", ISS_OFF);
    IUFillSwitchVector(&AlignmentSP, AlignmentS, 3, getDeviceName(), "Alignment", "", MAIN_CONTROL_TAB, IP_RW,
                       ISR_1OFMANY, 0, IPS_IDLE);
 
#if 0
    IUFillSwitch(&SlewRateS[SLEW_GUIDE], "SLEW_GUIDE", "Guide", ISS_OFF);
    IUFillSwitch(&SlewRateS[SLEW_CENTERING], "SLEW_CENTERING", "Centering", ISS_OFF);
    IUFillSwitch(&SlewRateS[SLEW_FIND], "SLEW_FIND", "Find", ISS_OFF);
    IUFillSwitch(&SlewRateS[SLEW_MAX], "SLEW_MAX", "Max", ISS_ON);
    IUFillSwitchVector(&SlewRateSP, SlewRateS, 4, getDeviceName(), "TELESCOPE_SLEW_RATE", "Slew Rate", MOTION_TAB, IP_RW,
                       ISR_1OFMANY, 0, IPS_IDLE);
#endif
 
#if 0
    IUFillSwitch(&TrackModeS[0], "TRACK_SIDEREAL", "Sidereal", ISS_ON);
    IUFillSwitch(&TrackModeS[1], "TRACK_SOLAR", "Solar", ISS_OFF);
    IUFillSwitch(&TrackModeS[2], "TRACK_LUNAR", "Lunar", ISS_OFF);
    IUFillSwitch(&TrackModeS[3], "TRACK_CUSTOM", "Custom", ISS_OFF);
    IUFillSwitchVector(&TrackModeSP, TrackModeS, 4, getDeviceName(), "TELESCOPE_TRACK_MODE", "Track Mode", MOTION_TAB,
                       IP_RW, ISR_1OFMANY, 0, IPS_IDLE);
#endif
 
    AddTrackMode("TRACK_SIDEREAL", "Sidereal", true);
    AddTrackMode("TRACK_SOLAR", "Solar");
    AddTrackMode("TRACK_LUNAR", "Lunar");
    AddTrackMode("TRACK_CUSTOM", "Custom");
 
    if (genericCapability & LX200_HAS_PRECISE_TRACKING_FREQ)
    {
        IUFillNumber(&TrackFreqN[0], "trackFreq", "Freq", "%g", 55, 65, 0.00001, 60.16427);
    }
    else
    {
        IUFillNumber(&TrackFreqN[0], "trackFreq", "Freq", "%g", 56.4, 60.1, 0.1, 60.1);
    }
    IUFillNumberVector(&TrackFreqNP, TrackFreqN, 1, getDeviceName(), "Tracking Frequency", "", MOTION_TAB, IP_RW, 0,
                       IPS_IDLE);
 
    IUFillSwitch(&UsePulseCmdS[0], "Off", "Off", ISS_OFF);
    IUFillSwitch(&UsePulseCmdS[1], "On", "On", ISS_ON);
    IUFillSwitchVector(&UsePulseCmdSP, UsePulseCmdS, 2, getDeviceName(), "Use Pulse Cmd", "", MAIN_CONTROL_TAB, IP_RW,
                       ISR_1OFMANY, 0, IPS_IDLE);
 
    int selectedSite = 0;
    IUGetConfigOnSwitchIndex(getDeviceName(), "Sites", &selectedSite);
    IUFillSwitch(&SiteS[0], "Site 1", "Site 1", selectedSite == 0 ? ISS_ON : ISS_OFF);
    IUFillSwitch(&SiteS[1], "Site 2", "Site 2", selectedSite == 1 ? ISS_ON : ISS_OFF);
    IUFillSwitch(&SiteS[2], "Site 3", "Site 3", selectedSite == 2 ? ISS_ON : ISS_OFF);
    IUFillSwitch(&SiteS[3], "Site 4", "Site 4", selectedSite == 3 ? ISS_ON : ISS_OFF);
    IUFillSwitchVector(&SiteSP, SiteS, 4, getDeviceName(), "Sites", "", SITE_TAB, IP_RW, ISR_1OFMANY, 0, IPS_IDLE);
 
    char siteName[64] = {"NA"};
    IUGetConfigText(getDeviceName(), "Site Name", "Name", siteName, 64);
    IUFillText(&SiteNameT[0], "Name", "Name", siteName);
    IUFillTextVector(&SiteNameTP, SiteNameT, 1, getDeviceName(), "Site Name", "Site Name", SITE_TAB, IP_RW, 0, IPS_IDLE);
 
 
    if (genericCapability & LX200_HAS_FOCUS)
    {
        FI::SetCapability(FOCUSER_CAN_ABORT | FOCUSER_CAN_REVERSE | FOCUSER_HAS_VARIABLE_SPEED);
        FI::initProperties(FOCUS_TAB);
 
        //        IUFillSwitch(&FocusModeS[0], "FOCUS_HALT", "Halt", ISS_ON);
        //        IUFillSwitch(&FocusModeS[1], "FOCUS_SLOW", "Slow", ISS_OFF);
        //        IUFillSwitch(&FocusModeS[2], "FOCUS_FAST", "Fast", ISS_OFF);
        //        IUFillSwitchVector(&FocusModeSP, FocusModeS, 3, getDeviceName(), "FOCUS_MODE", "Mode", FOCUS_TAB, IP_RW,
        //                           ISR_1OFMANY, 0, IPS_IDLE);
 
        // Classical speeds slow or fast
        FocusSpeedNP[0].setMin(1);
        FocusSpeedNP[0].setMax(2);
        FocusSpeedNP[0].setValue(1);
        setDriverInterface(getDriverInterface() | FOCUSER_INTERFACE);
    }
 
    TrackState = SCOPE_IDLE;
 
    GI::initProperties(GUIDE_TAB);
 
    /* Add debug/simulation/config controls so we may debug driver if necessary */
    addAuxControls();
 
    setDriverInterface(getDriverInterface() | GUIDER_INTERFACE);
 
    if (m_Location.longitude > 0)
        currentRA  = get_local_sidereal_time(m_Location.longitude);
    if (m_Location.latitude != 0)
        currentDEC = m_Location.latitude > 0 ? 90 : -90;
    return true;
}
 
void LX200Telescope::ISGetProperties(const char *dev)
{
    if (dev != nullptr && strcmp(dev, getDeviceName()) != 0)
        return;
 
    INDI::Telescope::ISGetProperties(dev);
 
    /*
    if (isConnected())
    {
        if (genericCapability & LX200_HAS_ALIGNMENT_TYPE)
            defineProperty(&AlignmentSP);
 
        if (genericCapability & LX200_HAS_TRACKING_FREQ)
            defineProperty(&TrackFreqNP);
 
        if (genericCapability & LX200_HAS_PULSE_GUIDING)
            defineProperty(&UsePulseCmdSP);
 
        if (genericCapability & LX200_HAS_SITES)
        {
            defineProperty(&SiteSP);
            defineProperty(&SiteNameTP);
        }
 
        defineProperty(&GuideNSNP);
        defineProperty(&GuideWENP);
 
        if (genericCapability & LX200_HAS_FOCUS)
        {
            defineProperty(&FocusMotionSP);
            defineProperty(&FocusTimerNP);
            defineProperty(&FocusModeSP);
        }
    }
    */
}
 
bool LX200Telescope::updateProperties()
{
    INDI::Telescope::updateProperties();
 
    if (isConnected())
    {
        if (genericCapability & LX200_HAS_ALIGNMENT_TYPE)
            defineProperty(&AlignmentSP);
 
        if (genericCapability & LX200_HAS_TRACKING_FREQ)
            defineProperty(&TrackFreqNP);
 
        if (genericCapability & LX200_HAS_PULSE_GUIDING)
            defineProperty(&UsePulseCmdSP);
 
        if (genericCapability & LX200_HAS_SITES)
        {
            defineProperty(&SiteSP);
            defineProperty(&SiteNameTP);
        }
 
        GI::updateProperties();
 
 
        if (genericCapability & LX200_HAS_FOCUS)
        {
            FI::updateProperties();
            //defineProperty(&FocusModeSP);
        }
 
        getBasicData();
    }
    else
    {
        if (genericCapability & LX200_HAS_ALIGNMENT_TYPE)
            deleteProperty(AlignmentSP.name);
 
        if (genericCapability & LX200_HAS_TRACKING_FREQ)
            deleteProperty(TrackFreqNP.name);
 
        if (genericCapability & LX200_HAS_PULSE_GUIDING)
            deleteProperty(UsePulseCmdSP.name);
 
        if (genericCapability & LX200_HAS_SITES)
        {
            deleteProperty(SiteSP.name);
            deleteProperty(SiteNameTP.name);
        }
 
        GI::updateProperties();
 
        if (genericCapability & LX200_HAS_FOCUS)
        {
            FI::updateProperties();
            //deleteProperty(FocusModeSP.name);
        }
    }
 
    return true;
}
 
bool LX200Telescope::checkConnection()
{
    if (isSimulation())
        return true;
 
    return (check_lx200_connection(PortFD) == 0);
}
 
bool LX200Telescope::Handshake()
{
    return checkConnection();
}
 
bool LX200Telescope::isSlewComplete()
{
    return (::isSlewComplete(PortFD) == 1);
}
 
bool LX200Telescope::ReadScopeStatus()
{
    if (!isConnected())
        return false;
 
    if (isSimulation())
    {
        mountSim();
        return true;
    }
 
    //if (check_lx200_connection(PortFD))
    //return false;
 
    if (TrackState == SCOPE_SLEWING)
    {
        // Check if LX200 is done slewing
        if (isSlewComplete())
        {
            // Set slew mode to "Centering"
            SlewRateSP.reset();
            SlewRateSP[SLEW_CENTERING].setState(ISS_ON);
            SlewRateSP.apply();
 
            TrackState = SCOPE_TRACKING;
            LOG_INFO("Slew is complete. Tracking...");
        }
    }
    else if (TrackState == SCOPE_PARKING)
    {
        if (isSlewComplete())
        {
            SetParked(true);
        }
    }
 
    if (getLX200RA(PortFD, &currentRA) < 0 || getLX200DEC(PortFD, &currentDEC) < 0)
    {
        EqNP.setState(IPS_ALERT);
        LOG_ERROR("Error reading RA/DEC.");
        EqNP.apply();
        return false;
    }
 
    NewRaDec(currentRA, currentDEC);
 
    return true;
}
 
bool LX200Telescope::Goto(double ra, double dec)
{
    const struct timespec timeout = {0, 100000000L};
 
    targetRA  = ra;
    targetDEC = dec;
    char RAStr[64] = {0}, DecStr[64] = {0};
    int fracbase = 0;
 
    switch (getLX200EquatorialFormat())
    {
        case LX200_EQ_LONGER_FORMAT:
            fracbase = 360000;
            break;
        case LX200_EQ_LONG_FORMAT:
        case LX200_EQ_SHORT_FORMAT:
        default:
            fracbase = 3600;
            break;
    }
 
    fs_sexa(RAStr, targetRA, 2, fracbase);
    fs_sexa(DecStr, targetDEC, 2, fracbase);
 
    // If moving, let's stop it first.
    if (EqNP.getState() == IPS_BUSY)
    {
        if (!isSimulation() && abortSlew(PortFD) < 0)
        {
            AbortSP.setState(IPS_ALERT);
            LOG_ERROR("Abort slew failed.");
            AbortSP.apply();
            return false;
        }
 
        AbortSP.setState(IPS_OK);
        EqNP.setState(IPS_IDLE);
        LOG_ERROR("Slew aborted.");
        AbortSP.apply();
        EqNP.apply();
 
        if (MovementNSSP.getState() == IPS_BUSY || MovementWESP.getState() == IPS_BUSY)
        {
            MovementNSSP.setState(IPS_IDLE);
            MovementWESP.setState(IPS_IDLE);
            EqNP.setState(IPS_IDLE);
            MovementNSSP.reset();
            MovementWESP.reset();
            MovementNSSP.apply();
            MovementWESP.apply();
        }
 
        // sleep for 100 mseconds
        nanosleep(&timeout, nullptr);
    }
 
    if (!isSimulation())
    {
        if (setObjectRA(PortFD, targetRA) < 0 || (setObjectDEC(PortFD, targetDEC)) < 0)
        {
            EqNP.setState(IPS_ALERT);
            LOG_ERROR("Error setting RA/DEC.");
            EqNP.apply();
            return false;
        }
 
        int err = 0;
 
        /* Slew reads the '0', that is not the end of the slew */
        if ((err = Slew(PortFD)))
        {
            LOGF_ERROR("Error Slewing to JNow RA %s - DEC %s", RAStr, DecStr);
            slewError(err);
            return false;
        }
    }
 
    TrackState = SCOPE_SLEWING;
    //EqNP.s     = IPS_BUSY;
 
    LOGF_INFO("Slewing to RA: %s - DEC: %s", RAStr, DecStr);
 
    return true;
}
 
bool LX200Telescope::Sync(double ra, double dec)
{
    char syncString[256] = {0};
 
    if (!isSimulation() && (setObjectRA(PortFD, ra) < 0 || (setObjectDEC(PortFD, dec)) < 0))
    {
        EqNP.setState(IPS_ALERT);
        LOG_ERROR("Error setting RA/DEC. Unable to Sync.");
        EqNP.apply();
        return false;
    }
 
    if (!isSimulation() && ::Sync(PortFD, syncString) < 0)
    {
        EqNP.setState(IPS_ALERT);
        LOG_ERROR("Synchronization failed.");
        EqNP.apply();
        return false;
    }
 
    currentRA  = ra;
    currentDEC = dec;
 
    LOG_INFO("Synchronization successful.");
 
    EqNP.setState(IPS_OK);
 
    NewRaDec(currentRA, currentDEC);
 
    return true;
}
 
bool LX200Telescope::Park()
{
    const struct timespec timeout = {0, 100000000L};
    if (!isSimulation())
    {
        // If scope is moving, let's stop it first.
        if (EqNP.getState() == IPS_BUSY)
        {
            if (!isSimulation() && abortSlew(PortFD) < 0)
            {
                AbortSP.setState(IPS_ALERT);
                LOG_ERROR("Abort slew failed");
                AbortSP.apply();
                return false;
            }
 
            AbortSP.setState(IPS_OK);
            EqNP.setState(IPS_IDLE);
            LOG_ERROR("Slew aborted.");
            AbortSP.apply();
            EqNP.apply();
 
            if (MovementNSSP.getState() == IPS_BUSY || MovementWESP.getState() == IPS_BUSY)
            {
                MovementNSSP.setState(IPS_IDLE);
                MovementWESP.setState(IPS_IDLE);
                EqNP.setState(IPS_IDLE);
                MovementNSSP.reset();
                MovementWESP.reset();
 
                MovementNSSP.apply();
                MovementWESP.apply();
            }
 
            // sleep for 100 msec
            nanosleep(&timeout, nullptr);
        }
 
        if (!isSimulation() && slewToPark(PortFD) < 0)
        {
            ParkSP.setState(IPS_ALERT);
            LOG_ERROR("Parking Failed.");
            ParkSP.apply();
            return false;
        }
    }
 
    TrackState = SCOPE_PARKING;
    LOG_INFO("Parking telescope in progress...");
    return true;
}
 
bool LX200Telescope::MoveNS(INDI_DIR_NS dir, TelescopeMotionCommand command)
{
    int current_move = (dir == DIRECTION_NORTH) ? LX200_NORTH : LX200_SOUTH;
 
    switch (command)
    {
        case MOTION_START:
            if (!isSimulation() && MoveTo(PortFD, current_move) < 0)
            {
                LOG_ERROR("Error setting N/S motion direction.");
                return false;
            }
            else
                LOGF_DEBUG("Moving toward %s.",
                           (current_move == LX200_NORTH) ? "North" : "South");
            break;
 
        case MOTION_STOP:
            if (!isSimulation() && HaltMovement(PortFD, current_move) < 0)
            {
                LOG_ERROR("Error stopping N/S motion.");
                return false;
            }
            else
                LOGF_DEBUG("Movement toward %s halted.",
                           (current_move == LX200_NORTH) ? "North" : "South");
            break;
    }
 
    return true;
}
 
bool LX200Telescope::MoveWE(INDI_DIR_WE dir, TelescopeMotionCommand command)
{
    int current_move = (dir == DIRECTION_WEST) ? LX200_WEST : LX200_EAST;
 
    switch (command)
    {
        case MOTION_START:
            if (!isSimulation() && MoveTo(PortFD, current_move) < 0)
            {
                LOG_ERROR("Error setting W/E motion direction.");
                return false;
            }
            else
                LOGF_DEBUG("Moving toward %s.", (current_move == LX200_WEST) ? "West" : "East");
            break;
 
        case MOTION_STOP:
            if (!isSimulation() && HaltMovement(PortFD, current_move) < 0)
            {
                LOG_ERROR("Error stopping W/E motion.");
                return false;
            }
            else
                LOGF_DEBUG("Movement toward %s halted.",
                           (current_move == LX200_WEST) ? "West" : "East");
            break;
    }
 
    return true;
}
 
bool LX200Telescope::Abort()
{
    if (!isSimulation() && abortSlew(PortFD) < 0)
    {
        LOG_ERROR("Failed to abort slew.");
        return false;
    }
 
    if (GuideNSNP.getState() == IPS_BUSY || GuideWENP.getState() == IPS_BUSY)
    {
        GuideNSNP.setState(IPS_IDLE);
        GuideWENP.setState(IPS_IDLE);
        GuideWENP[AXIS_RA].setValue(0);
        GuideWENP[AXIS_DE].setValue(0);
        GuideNSNP[AXIS_RA].setValue(0);
        GuideNSNP[AXIS_DE].setValue(0);
 
        if (GuideNSTID)
        {
            IERmTimer(GuideNSTID);
            GuideNSTID = 0;
        }
 
        if (GuideWETID)
        {
            IERmTimer(GuideWETID);
            GuideNSTID = 0;
        }
 
        LOG_INFO("Guide aborted.");
        GuideNSNP.apply();
        GuideWENP.apply();
 
        return true;
    }
 
    return true;
}
 
bool LX200Telescope::setLocalDate(uint8_t days, uint8_t months, uint16_t years)
{
    return (setCalenderDate(PortFD, days, months, years) == 0);
}
 
bool LX200Telescope::setLocalTime24(uint8_t hour, uint8_t minute, uint8_t second)
{
    return (setLocalTime(PortFD, hour, minute, second) == 0);
}
 
bool LX200Telescope::setUTCOffset(double offset)
{
    return (::setUTCOffset(PortFD, (offset * -1.0)) == 0);
}
 
bool LX200Telescope::updateTime(ln_date *utc, double utc_offset)
{
    struct ln_zonedate ltm;
 
    if (isSimulation())
        return true;
 
    ln_date_to_zonedate(utc, &ltm, utc_offset * 3600.0);
 
    JD = ln_get_julian_day(utc);
 
    LOGF_DEBUG("New JD is %.2f", JD);
 
    // Meade defines UTC Offset as the offset ADDED to local time to yield UTC, which
    // is the opposite of the standard definition of UTC offset!
    if (setUTCOffset(utc_offset) == false)
    {
        LOG_ERROR("Error setting UTC Offset.");
        return false;
    }
 
    // Set Local Time
    if (setLocalTime24(ltm.hours, ltm.minutes, ltm.seconds) == false)
    {
        LOG_ERROR("Error setting local time.");
        return false;
    }
 
    if (setLocalDate(ltm.days, ltm.months, ltm.years) == false)
    {
        LOG_ERROR("Error setting local date.");
        return false;
    }
 
    LOG_INFO("Time updated, updating planetary data...");
    return true;
}
 
bool LX200Telescope::updateLocation(double latitude, double longitude, double elevation)
{
    INDI_UNUSED(elevation);
 
    // JM 2021-04-10: MUST convert from INDI longitude to standard longitude.
    // DO NOT REMOVE
    if (longitude > 180)
        longitude = longitude - 360;
 
    if (!isSimulation())
    {
        if (setSiteLongitude(PortFD, longitude) < 0)
        {
            LOG_ERROR("Error setting site longitude coordinates");
            return false;
        }
 
        if (setSiteLatitude(PortFD, latitude) < 0)
        {
            LOG_ERROR("Error setting site latitude coordinates");
            return false;
        }
    }
 
    char l[MAXINDINAME] = {0}, L[MAXINDINAME] = {0};
    fs_sexa(l, latitude, 2, 36000);
    fs_sexa(L, longitude, 2, 36000);
 
    // Choose WGS 84, also known as EPSG:4326 for latitude/longitude ordering
    LOGF_INFO("Site location in the mount updated to Latitude %.12s (%g) Longitude %.12s (%g) (Longitude sign in carthography format)",
              l, latitude, L, longitude);
 
    return true;
}
 
bool LX200Telescope::ISNewText(const char *dev, const char *name, char *texts[], char *names[], int n)
{
    if (dev != nullptr && strcmp(dev, getDeviceName()) == 0)
    {
        if (!strcmp(name, SiteNameTP.name))
        {
            if (!isSimulation() && setSiteName(PortFD, texts[0], currentSiteNum) < 0)
            {
                SiteNameTP.s = IPS_ALERT;
                IDSetText(&SiteNameTP, "Setting site name");
                return false;
            }
 
            SiteNameTP.s = IPS_OK;
            IText *tp    = IUFindText(&SiteNameTP, names[0]);
            IUSaveText(tp, texts[0]);
            IDSetText(&SiteNameTP, "Site name updated");
            return true;
        }
    }
 
    return INDI::Telescope::ISNewText(dev, name, texts, names, n);
}
 
bool LX200Telescope::ISNewNumber(const char *dev, const char *name, double values[], char *names[], int n)
{
    // Check focuser interface
    if (FI::processNumber(dev, name, values, names, n))
        return true;
    // Check guider interface
    if (GI::processNumber(dev, name, values, names, n))
        return true;
 
    // Check rest of LX200Telescope properties
    if (dev != nullptr && strcmp(dev, getDeviceName()) == 0)
    {
        // Update Frequency
        if (!strcmp(name, TrackFreqNP.name))
        {
            LOGF_DEBUG("Trying to set track freq of: %04.1f", values[0]);
            if (genericCapability & LX200_HAS_PRECISE_TRACKING_FREQ)
            {
                if (!isSimulation() && setPreciseTrackFreq(PortFD, values[0]) < 0)
                {
                    TrackFreqNP.s = IPS_ALERT;
                    IDSetNumber(&TrackFreqNP, "Error setting tracking frequency");
                    return false;
                }
                TrackFreqNP.s           = IPS_OK;
                TrackFreqNP.np[0].value = values[0];
                IDSetNumber(&TrackFreqNP, "Tracking frequency set to %8.5f", values[0]);
            }
            else
            {
                //Normal Tracking Frequency
                if (!isSimulation() && setTrackFreq(PortFD, values[0]) < 0)
 
                    LOGF_DEBUG("Trying to set track freq of: %f\n", values[0]);
                if (!isSimulation() && setTrackFreq(PortFD, values[0]) < 0)
                {
                    LOGF_DEBUG("Trying to set track freq of: %f\n", values[0]);
                    if (!isSimulation() && setTrackFreq(PortFD, values[0]) < 0)
                    {
                        TrackFreqNP.s = IPS_ALERT;
                        IDSetNumber(&TrackFreqNP, "Error setting tracking frequency");
                        return false;
                    }
                    TrackFreqNP.s           = IPS_OK;
                    IDSetNumber(&TrackFreqNP, "Error setting tracking frequency");
                    return false;
                }
 
                TrackFreqNP.s           = IPS_OK;
                TrackFreqNP.np[0].value = values[0];
                IDSetNumber(&TrackFreqNP, "Tracking frequency set to %04.1f", values[0]);
            }
 
            if (trackingMode != LX200_TRACK_MANUAL)
            {
                trackingMode    = LX200_TRACK_MANUAL;
                TrackModeSP[0].setState(ISS_OFF);
                TrackModeSP[1].setState(ISS_OFF);
                TrackModeSP[2].setState(ISS_OFF);
                TrackModeSP[3].setState(ISS_ON);
                TrackModeSP.setState(IPS_OK);
                selectTrackingMode(PortFD, trackingMode);
                TrackModeSP.apply();
            }
 
            return true;
        }
    }
 
    //  if we didn't process it, continue up the chain, let somebody else
    //  give it a shot
    return INDI::Telescope::ISNewNumber(dev, name, values, names, n);
}
 
bool LX200Telescope::ISNewSwitch(const char *dev, const char *name, ISState *states, char *names[], int n)
{
    // Focuser Interface
    if (FI::processSwitch(dev, name, states, names, n))
        return true;
 
    if (dev != nullptr && strcmp(dev, getDeviceName()) == 0)
    {
        // Alignment
        if (!strcmp(name, AlignmentSP.name))
        {
            if (IUUpdateSwitch(&AlignmentSP, states, names, n) < 0)
                return false;
 
            int index = IUFindOnSwitchIndex(&AlignmentSP);
 
            if (!isSimulation() && setAlignmentMode(PortFD, index) < 0)
            {
                AlignmentSP.s = IPS_ALERT;
                IDSetSwitch(&AlignmentSP, "Error setting alignment mode.");
                return false;
            }
 
            AlignmentSP.s = IPS_OK;
            IDSetSwitch(&AlignmentSP, nullptr);
            return true;
        }
 
        // Sites
        if (!strcmp(name, SiteSP.name))
        {
            if (IUUpdateSwitch(&SiteSP, states, names, n) < 0)
                return false;
 
            currentSiteNum = IUFindOnSwitchIndex(&SiteSP) + 1;
 
            if (!isSimulation() && selectSite(PortFD, currentSiteNum) < 0)
            {
                SiteSP.s = IPS_ALERT;
                IDSetSwitch(&SiteSP, "Error selecting sites.");
                return false;
            }
            char siteName[64] = {0};
            if (isSimulation())
            {
                IUSaveText(&SiteNameTP.tp[0], "Sample Site");
            }
            else
            {
                getSiteName(PortFD, siteName, currentSiteNum);
                IUSaveText(&SiteNameT[0], siteName);
            }
            if (GetTelescopeCapability() & TELESCOPE_HAS_LOCATION)
                sendScopeLocation();
 
            SiteNameTP.s = IPS_OK;
            SiteSP.s = IPS_OK;
 
            IDSetText(&SiteNameTP, nullptr);
            IDSetSwitch(&SiteSP, nullptr);
 
            return false;
        }
 
        // Pulse-Guide command support
        if (!strcmp(name, UsePulseCmdSP.name))
        {
            IUResetSwitch(&UsePulseCmdSP);
            IUUpdateSwitch(&UsePulseCmdSP, states, names, n);
 
            UsePulseCmdSP.s = IPS_OK;
            IDSetSwitch(&UsePulseCmdSP, nullptr);
            usePulseCommand = (UsePulseCmdS[1].s == ISS_ON);
            LOGF_INFO("Pulse guiding is %s.", usePulseCommand ? "enabled" : "disabled");
            return true;
        }
    }
 
    //  Nobody has claimed this, so pass it to the parent
    return INDI::Telescope::ISNewSwitch(dev, name, states, names, n);
}
 
bool LX200Telescope::SetTrackMode(uint8_t mode)
{
    if (isSimulation())
        return true;
 
    bool rc = (selectTrackingMode(PortFD, mode) == 0);
 
    // Only update tracking frequency if it is defined and not deleted by child classes
    // Note, that LX200_HAS_PRECISE_TRACKING_FREQ can use the same get function
    if (rc &&  (genericCapability & LX200_HAS_TRACKING_FREQ))
    {
        getTrackFreq(PortFD, &TrackFreqN[0].value);
        IDSetNumber(&TrackFreqNP, nullptr);
    }
    return rc;
}
 
bool LX200Telescope::SetSlewRate(int index)
{
    // Convert index to Meade format
    index = 3 - index;
 
    if (!isSimulation() && setSlewMode(PortFD, index) < 0)
    {
        LOG_ERROR("Error setting slew mode.");
        return false;
    }
 
    return true;
}
 
bool LX200Telescope::updateSlewRate(int index)
{
    if (SlewRateSP.findOnSwitchIndex() == index)
        return true;
 
    if (!isSimulation() && setSlewMode(PortFD, 3 - index) < 0)
    {
        SlewRateSP.setState(IPS_ALERT);
        LOG_ERROR("Error setting slew mode.");
        SlewRateSP.apply();
        return false;
    }
 
    SlewRateSP.reset();
    SlewRateSP[index].setState(ISS_ON);
    SlewRateSP.setState(IPS_OK);
    SlewRateSP.apply();
    return true;
}
 
void LX200Telescope::updateFocusHelper(void *p)
{
    static_cast<LX200Telescope *>(p)->updateFocusTimer();
}
 
void LX200Telescope::updateFocusTimer()
{
    //    switch (FocusTimerNP.s)
    //    {
    //        case IPS_IDLE:
    //            break;
 
    //        case IPS_BUSY:
    //            //if (isDebug())
    //            //IDLog("Focus Timer Value is %g\n", FocusTimerN[0].value);
 
    //            FocusTimerN[0].value -= 50;
 
    //            if (FocusTimerN[0].value <= 0)
    //            {
    //                //if (isDebug())
    //                //IDLog("Focus Timer Expired\n");
 
    //                if (!isSimulation() && setFocuserSpeedMode(PortFD, 0) < 0)
    //                {
    //                    FocusModeSP.s = IPS_ALERT;
    //                    IDSetSwitch(&FocusModeSP, "Error setting focuser mode.");
 
    //                    //if (isDebug())
    //                    //IDLog("Error setting focuser mode\n");
 
    //                    return;
    //                }
 
    //                FocusMotionSP.setState(IPS_IDLE);
    //                FocusTimerNP.s  = IPS_OK;
    //                FocusModeSP.s   = IPS_OK;
 
    //                FocusMotionSP.reset();
    //                IUResetSwitch(&FocusModeSP);
    //                FocusModeS[0].s = ISS_ON;
 
    //                IDSetSwitch(&FocusModeSP, nullptr);
    //                FocusMotionSP.apply();
    //            }
 
    //            FocusTimerNP.apply();
 
    //            if (FocusTimerN[0].value > 0)
    //                IEAddTimer(50, LX200Telescope::updateFocusHelper, this);
    //            break;
 
    //        case IPS_OK:
    //            break;
 
    //        case IPS_ALERT:
    //            break;
    //    }
 
    AbortFocuser();
    FocusTimerNP.setState(IPS_OK);
    FocusTimerNP[0].setValue(0);
    FocusTimerNP.apply();
}
 
void LX200Telescope::mountSim()
{
    static struct timeval ltv;
    struct timeval tv;
    double dt = 0, da = 0, dx = 0;
    int nlocked = 0;
 
    /* update elapsed time since last poll, don't presume exactly POLLMS */
    gettimeofday(&tv, nullptr);
 
    if (ltv.tv_sec == 0 && ltv.tv_usec == 0)
        ltv = tv;
 
    dt  = tv.tv_sec - ltv.tv_sec + (tv.tv_usec - ltv.tv_usec) / 1e6;
    ltv = tv;
    da  = LX200_GENERIC_SLEWRATE * dt;
 
    /* Process per current state. We check the state of EQUATORIAL_COORDS and act accordingly */
    switch (TrackState)
    {
 
        case SCOPE_IDLE:
            currentRA  += (TRACKRATE_SIDEREAL / 3600.0 * dt / 15.);
            break;
 
        case SCOPE_TRACKING:
            switch (TrackModeSP.findOnSwitchIndex())
            {
                case TRACK_SIDEREAL:
                    da = 0;
                    dx = 0;
                    break;
 
                case TRACK_LUNAR:
                    da = ((TRACKRATE_LUNAR - TRACKRATE_SIDEREAL) / 3600.0 * dt / 15.);
                    dx = 0;
                    break;
 
                case TRACK_SOLAR:
                    da = ((TRACKRATE_SOLAR - TRACKRATE_SIDEREAL) / 3600.0 * dt / 15.);
                    dx = 0;
                    break;
 
                case TRACK_CUSTOM:
                    da = ((TrackRateNP[AXIS_RA].getValue() - TRACKRATE_SIDEREAL) / 3600.0 * dt / 15.);
                    dx = (TrackRateNP[AXIS_DE].getValue() / 3600.0 * dt);
                    break;
 
            }
 
            currentRA  += da;
            currentDEC += dx;
            break;
 
        case SCOPE_SLEWING:
        case SCOPE_PARKING:
            /* slewing - nail it when both within one pulse @ LX200_GENERIC_SLEWRATE */
            nlocked = 0;
 
            dx = targetRA - currentRA;
 
            if (fabs(dx) <= da)
            {
                currentRA = targetRA;
                nlocked++;
            }
            else if (dx > 0)
                currentRA += da / 15.;
            else
                currentRA -= da / 15.;
 
            dx = targetDEC - currentDEC;
            if (fabs(dx) <= da)
            {
                currentDEC = targetDEC;
                nlocked++;
            }
            else if (dx > 0)
                currentDEC += da;
            else
                currentDEC -= da;
 
            if (nlocked == 2)
            {
                if (TrackState == SCOPE_SLEWING)
                    TrackState = SCOPE_TRACKING;
                else
                    SetParked(true);
            }
 
            break;
 
        default:
            break;
    }
 
    NewRaDec(currentRA, currentDEC);
}
 
void LX200Telescope::getBasicData()
{
    if (!isSimulation())
    {
        checkLX200EquatorialFormat(PortFD);
 
        if (genericCapability & LX200_HAS_ALIGNMENT_TYPE)
            getAlignment();
 
        // Only check time format if it is not already initialized by the class
        if ( (GetTelescopeCapability() & TELESCOPE_HAS_TIME) && timeFormat == -1)
        {
            if (getTimeFormat(PortFD, &timeFormat) < 0)
                LOG_ERROR("Failed to retrieve time format from device.");
            else
            {
                timeFormat = (timeFormat == 24) ? LX200_24 : LX200_AM;
                // We always do 24 hours
                if (timeFormat != LX200_24)
                {
                    // Toggle format and suppress gcc warning
                    int rc = toggleTimeFormat(PortFD);
                    INDI_UNUSED(rc);
                }
            }
        }
 
        if (genericCapability & LX200_HAS_SITES)
        {
            char siteName[64] = {0};
            if (getSiteName(PortFD, siteName, currentSiteNum) < 0)
            {
                LOG_ERROR("Failed to get site name from device");
            }
            else
            {
                IUSaveText(&SiteNameT[0], siteName);
                IDSetText(&SiteNameTP, nullptr);
            }
        }
 
 
        if (genericCapability & LX200_HAS_TRACKING_FREQ)
        {
            if (getTrackFreq(PortFD, &TrackFreqN[0].value) < 0)
                LOG_ERROR("Failed to get tracking frequency from device.");
            else
                IDSetNumber(&TrackFreqNP, nullptr);
        }
 
    }
 
    if (sendLocationOnStartup && (GetTelescopeCapability() & TELESCOPE_HAS_LOCATION))
        sendScopeLocation();
    if (sendTimeOnStartup && (GetTelescopeCapability() & TELESCOPE_HAS_TIME))
        sendScopeTime();
}
 
void LX200Telescope::slewError(int slewCode)
{
    if (slewCode == 1)
        LOG_ERROR("Object below horizon.");
    else if (slewCode == 2)
        LOG_ERROR("Object below the minimum elevation limit.");
    else
        LOGF_ERROR("Slew failed (%d).", slewCode);
 
    EqNP.setState(IPS_ALERT);
    EqNP.apply();
}
 
void LX200Telescope::getAlignment()
{
    signed char align = ACK(PortFD);
    if (align < 0)
    {
        IDSetSwitch(&AlignmentSP, "Failed to get telescope alignment.");
        return;
    }
 
    AlignmentS[0].s = ISS_OFF;
    AlignmentS[1].s = ISS_OFF;
    AlignmentS[2].s = ISS_OFF;
 
    switch (align)
    {
        case 'P':
            AlignmentS[0].s = ISS_ON;
            break;
        case 'A':
            AlignmentS[1].s = ISS_ON;
            break;
        case 'L':
            AlignmentS[2].s = ISS_ON;
            break;
    }
 
    AlignmentSP.s = IPS_OK;
    IDSetSwitch(&AlignmentSP, nullptr);
}
 
bool LX200Telescope::getLocalTime(char *timeString)
{
    if (isSimulation())
    {
        time_t now = time (nullptr);
        strftime(timeString, MAXINDINAME, "%T", localtime(&now));
    }
    else
    {
        double ctime = 0;
        int h, m, s;
        if (getLocalTime24(PortFD, &ctime) < 0)
            return false;
        getSexComponents(ctime, &h, &m, &s);
        snprintf(timeString, MAXINDINAME, "%02d:%02d:%02d", h, m, s);
    }
 
    return true;
}
 
bool LX200Telescope::getLocalDate(char *dateString)
{
    if (isSimulation())
    {
        time_t now = time (nullptr);
        strftime(dateString, MAXINDINAME, "%F", localtime(&now));
    }
    else
    {
        if (getCalendarDate(PortFD, dateString) < 0)
            return false;
    }
 
    return true;
}
 
bool LX200Telescope::getUTFOffset(double *offset)
{
    if (isSimulation())
    {
        *offset = 3;
        return true;
    }
 
    int lx200_utc_offset = 0;
    if (getUTCOffset(PortFD, &lx200_utc_offset) < 0)
        return false;
    // LX200 TimeT Offset is defined at the number of hours added to LOCAL TIME to get TimeT. This is contrary to the normal definition.
    *offset = lx200_utc_offset * -1;
    return true;
}
 
bool LX200Telescope::sendScopeTime()
{
    char cdate[MAXINDINAME] = {0};
    char ctime[MAXINDINAME] = {0};
    struct tm ltm;
    struct tm utm;
 
    memset(&ltm, 0, sizeof(ltm));
    memset(&utm, 0, sizeof(utm));
 
    time_t time_epoch;
 
    double offset = 0;
    if (getUTFOffset(&offset) == false)
    {
        LOG_WARN("Could not obtain UTC offset from mount!");
        return false;
    }
 
    if (getLocalTime(ctime) == false)
    {
        LOG_WARN("Could not obtain local time from mount!");
        return false;
    }
 
    if (getLocalDate(cdate) == false)
    {
        LOG_WARN("Could not obtain local date from mount!");
        return false;
    }
 
    // To ISO 8601 format in LOCAL TIME!
    char datetime[MAXINDINAME] = {0};
    snprintf(datetime, MAXINDINAME, "%sT%s", cdate, ctime);
 
    // Now that date+time are combined, let's get tm representation of it.
    if (strptime(datetime, "%FT%T", &ltm) == nullptr)
    {
        LOGF_WARN("Could not process mount date and time: %s", datetime);
        return false;
    }
 
    // Assume no daylight savings always
    int isdst = 0;
 
    // Try to get whether daylight saving time is toggled.
    // By default we assume it's inactive.
    // N.B. This only works for LX200 Autostar II so shouldn't be used in base class.
    //getDaylightSaving(PortFD, &isdst);
 
    ltm.tm_isdst = isdst;
 
    // A mount without a battery backed clock boots with a placeholder date (e.g. 2000-01-01).
    // Do not advertise it as valid time, otherwise clients may adopt it. Leave TIME_UTC idle
    // until a client sets the time.
    if (ltm.tm_year + 1900 < MIN_VALID_MOUNT_YEAR)
    {
        LOGF_WARN("Mount clock is not set (%s local). Waiting for time to be set by the client.", datetime);
        TimeTP.setState(IPS_IDLE);
        TimeTP.apply();
        return false;
    }
 
    // Get local time epoch in UNIX seconds
    time_epoch = mktime(&ltm);
 
    // LOCAL to UTC by subtracting offset.
    time_epoch -= static_cast<int>(offset * 3600.0);
 
    // Get UTC (we're using localtime_r, but since we shifted time_epoch above by UTCOffset, we should be getting the real UTC time)
    localtime_r(&time_epoch, &utm);
 
    // Format it into the final UTC ISO 8601
    strftime(cdate, MAXINDINAME, "%Y-%m-%dT%H:%M:%S", &utm);
    TimeTP[UTC].setText(cdate);
 
    char utcStr[8] = {0};
    snprintf(utcStr, 8, "%.2f", offset);
    TimeTP[OFFSET].setText(utcStr);
 
    LOGF_DEBUG("Mount controller UTC Time: %s", TimeTP[UTC].getText());
    LOGF_DEBUG("Mount controller UTC Offset: %s", TimeTP[OFFSET].getText());
 
    // Let's send everything to the client
    TimeTP.setState(IPS_OK);
    TimeTP.apply();
 
    return true;
}
 
bool LX200Telescope::sendScopeLocation()
{
    int lat_dd = 0, lat_mm = 0, long_dd = 0, long_mm = 0;
    double lat_ssf = 0.0, long_ssf = 0.0;
    char lat_sexagesimal[MAXINDIFORMAT];
    char lng_sexagesimal[MAXINDIFORMAT];
 
    if (isSimulation())
    {
        LocationNP[LOCATION_LATITUDE].setValue(29.5);
        LocationNP[LOCATION_LONGITUDE].setValue(48.0);
        LocationNP[LOCATION_ELEVATION].setValue(10);
        LocationNP.setState(IPS_OK);
        LocationNP.apply( );
        return true;
    }
 
    if (getSiteLatitude(PortFD, &lat_dd, &lat_mm, &lat_ssf) < 0)
    {
        LOG_WARN("Failed to get site latitude from device.");
        return false;
    }
    else
    {
        double value = 0;
        snprintf(lat_sexagesimal, MAXINDIFORMAT, "%02d:%02d:%02.1lf", lat_dd, lat_mm, lat_ssf);
        f_scansexa(lat_sexagesimal, &value);
        LocationNP[LOCATION_LATITUDE].setValue(value);
    }
 
    if (getSiteLongitude(PortFD, &long_dd, &long_mm, &long_ssf) < 0)
    {
        LOG_WARN("Failed to get site longitude from device.");
        return false;
    }
    else
    {
        double value = 0;
        snprintf(lng_sexagesimal, MAXINDIFORMAT, "%02d:%02d:%02.1lf", long_dd, long_mm, long_ssf);
        f_scansexa(lng_sexagesimal, &value);
        value = range360(value);
        LocationNP[LOCATION_LONGITUDE].setValue(value);
        fs_sexa(lng_sexagesimal, LocationNP[LOCATION_LONGITUDE].getValue(), 2, 36000);
    }
 
    LOGF_INFO("Mount has Latitude %s (%g) Longitude (0 to +360 Eastwards) %s (%g)",
              lat_sexagesimal,
              LocationNP[LOCATION_LATITUDE].getValue(),
              lng_sexagesimal,
              LocationNP[LOCATION_LONGITUDE].getValue());
 
    LocationNP.apply();
 
    saveConfig(true, "GEOGRAPHIC_COORD");
 
    return true;
}
 
IPState LX200Telescope::GuideNorth(uint32_t ms)
{
    if (TrackState == SCOPE_SLEWING || TrackState == SCOPE_PARKING)
    {
        LOG_ERROR("Cannot guide while slewing or parking in progress. Stop first.");
        return IPS_ALERT;
    }
 
    // If we're using pulse command, then MovementXXX should NOT be active at all.
    if (usePulseCommand && (MovementNSSP.getState() == IPS_BUSY || MovementWESP.getState() == IPS_BUSY))
    {
        LOG_ERROR("Cannot pulse guide while manually in motion. Stop first.");
        return IPS_ALERT;
    }
 
    if (GuideNSTID)
    {
        IERmTimer(GuideNSTID);
        GuideNSTID = 0;
    }
 
    if (usePulseCommand)
    {
        SendPulseCmd(LX200_NORTH, ms);
    }
    else
    {
        updateSlewRate(SLEW_GUIDE);
 
        ISState states[] = { ISS_ON, ISS_OFF };
        const char *names[] = { MovementNSSP[DIRECTION_NORTH].getName(), MovementNSSP[DIRECTION_SOUTH].getName()};
        ISNewSwitch(MovementNSSP.getDeviceName(), MovementNSSP.getName(), states, const_cast<char **>(names), 2);
    }
 
    guide_direction_ns = LX200_NORTH;
    GuideNSTID      = IEAddTimer(static_cast<int>(ms), guideTimeoutHelperNS, this);
    return IPS_BUSY;
}
 
IPState LX200Telescope::GuideSouth(uint32_t ms)
{
    if (TrackState == SCOPE_SLEWING || TrackState == SCOPE_PARKING)
    {
        LOG_ERROR("Cannot guide while slewing or parking in progress. Stop first.");
        return IPS_ALERT;
    }
 
    // If we're using pulse command, then MovementXXX should NOT be active at all.
    if (usePulseCommand && (MovementNSSP.getState() == IPS_BUSY || MovementWESP.getState() == IPS_BUSY))
    {
        LOG_ERROR("Cannot pulse guide while manually in motion. Stop first.");
        return IPS_ALERT;
    }
 
    if (GuideNSTID)
    {
        IERmTimer(GuideNSTID);
        GuideNSTID = 0;
    }
 
    if (usePulseCommand)
    {
        SendPulseCmd(LX200_SOUTH, ms);
    }
    else
    {
        updateSlewRate(SLEW_GUIDE);
 
        ISState states[] = { ISS_OFF, ISS_ON };
        const char *names[] = { MovementNSSP[DIRECTION_NORTH].getName(), MovementNSSP[DIRECTION_SOUTH].getName()};
        ISNewSwitch(MovementNSSP.getDeviceName(), MovementNSSP.getName(), states, const_cast<char **>(names), 2);
    }
 
    guide_direction_ns = LX200_SOUTH;
    GuideNSTID      = IEAddTimer(static_cast<int>(ms), guideTimeoutHelperNS, this);
    return IPS_BUSY;
}
 
IPState LX200Telescope::GuideEast(uint32_t ms)
{
    if (TrackState == SCOPE_SLEWING || TrackState == SCOPE_PARKING)
    {
        LOG_ERROR("Cannot guide while slewing or parking in progress. Stop first.");
        return IPS_ALERT;
    }
 
    // If we're using pulse command, then MovementXXX should NOT be active at all.
    if (usePulseCommand && (MovementNSSP.getState() == IPS_BUSY || MovementWESP.getState() == IPS_BUSY))
    {
        LOG_ERROR("Cannot pulse guide while manually in motion. Stop first.");
        return IPS_ALERT;
    }
 
    if (GuideWETID)
    {
        IERmTimer(GuideWETID);
        GuideWETID = 0;
    }
 
    if (usePulseCommand)
    {
        SendPulseCmd(LX200_EAST, ms);
    }
    else
    {
        updateSlewRate(SLEW_GUIDE);
 
        ISState states[] = { ISS_OFF, ISS_ON };
        const char *names[] = { MovementWESP[DIRECTION_WEST].getName(), MovementWESP[DIRECTION_EAST].getName()};
        ISNewSwitch(MovementWESP.getDeviceName(), MovementWESP.getName(), states, const_cast<char **>(names), 2);
    }
 
    guide_direction_we = LX200_EAST;
    GuideWETID      = IEAddTimer(static_cast<int>(ms), guideTimeoutHelperWE, this);
    return IPS_BUSY;
}
 
IPState LX200Telescope::GuideWest(uint32_t ms)
{
    if (TrackState == SCOPE_SLEWING || TrackState == SCOPE_PARKING)
    {
        LOG_ERROR("Cannot guide while slewing or parking in progress. Stop first.");
        return IPS_ALERT;
    }
 
    // If we're using pulse command, then MovementXXX should NOT be active at all.
    if (usePulseCommand && (MovementNSSP.getState() == IPS_BUSY || MovementWESP.getState() == IPS_BUSY))
    {
        LOG_ERROR("Cannot pulse guide while manually in motion. Stop first.");
        return IPS_ALERT;
    }
 
    if (GuideWETID)
    {
        IERmTimer(GuideWETID);
        GuideWETID = 0;
    }
 
    if (usePulseCommand)
    {
        SendPulseCmd(LX200_WEST, ms);
    }
    else
    {
        updateSlewRate(SLEW_GUIDE);
 
        ISState states[] = { ISS_ON, ISS_OFF };
        const char *names[] = { MovementWESP[DIRECTION_WEST].getName(), MovementWESP[DIRECTION_EAST].getName()};
        ISNewSwitch(MovementWESP.getDeviceName(), MovementWESP.getName(), states, const_cast<char **>(names), 2);
    }
 
    guide_direction_we = LX200_WEST;
    GuideWETID      = IEAddTimer(static_cast<int>(ms), guideTimeoutHelperWE, this);
    return IPS_BUSY;
}
 
int LX200Telescope::SendPulseCmd(int8_t direction, uint32_t duration_msec)
{
    return ::SendPulseCmd(PortFD, direction, duration_msec);
}
 
void LX200Telescope::guideTimeoutHelperNS(void * p)
{
    static_cast<LX200Telescope *>(p)->guideTimeoutNS();
}
 
void LX200Telescope::guideTimeoutHelperWE(void * p)
{
    static_cast<LX200Telescope *>(p)->guideTimeoutWE();
}
 
void LX200Telescope::guideTimeoutWE()
{
    if (usePulseCommand == false)
    {
        ISState states[] = { ISS_OFF, ISS_OFF };
        const char *names[] = { MovementWESP[DIRECTION_WEST].getName(), MovementWESP[DIRECTION_EAST].getName()};
        ISNewSwitch(MovementWESP.getDeviceName(), MovementWESP.getName(), states, const_cast<char **>(names), 2);
    }
 
    GuideWENP[DIRECTION_WEST].setValue(0);
    GuideWENP[DIRECTION_EAST].setValue(0);
    GuideWENP.setState(IPS_IDLE);
    GuideWETID = 0;
    GuideWENP.apply();
}
 
void LX200Telescope::guideTimeoutNS()
{
    if (usePulseCommand == false)
    {
        ISState states[] = { ISS_OFF, ISS_OFF };
        const char *names[] = { MovementNSSP[DIRECTION_NORTH].getName(), MovementNSSP[DIRECTION_SOUTH].getName()};
        ISNewSwitch(MovementNSSP.getDeviceName(), MovementNSSP.getName(), states, const_cast<char **>(names), 2);
    }
 
    GuideNSNP[0].setValue(0);
    GuideNSNP[1].setValue(0);
    GuideNSNP.setState(IPS_IDLE);
    GuideNSTID            = 0;
    GuideNSNP.apply();
 
}
 
bool LX200Telescope::saveConfigItems(FILE *fp)
{
    INDI::Telescope::saveConfigItems(fp);
 
    if (genericCapability & LX200_HAS_PULSE_GUIDING)
        IUSaveConfigSwitch(fp, &UsePulseCmdSP);
 
    if (genericCapability & LX200_HAS_FOCUS)
        FI::saveConfigItems(fp);
 
    return true;
}
 
bool LX200Telescope::ReverseFocuser(bool enabled)
{
    INDI_UNUSED(enabled);
    return true;
}
 
bool LX200Telescope::AbortFocuser()
{
    return SetFocuserSpeed(0);
}
 
IPState LX200Telescope::MoveFocuser(FocusDirection dir, int speed, uint16_t duration)
{
    FocusDirection finalDirection = dir;
    // Reverse final direction if necessary
    if (FocusReverseSP[INDI_ENABLED].getState() == ISS_ON)
        finalDirection = (dir == FOCUS_INWARD) ? FOCUS_OUTWARD : FOCUS_INWARD;
 
    SetFocuserSpeed(speed);
 
    setFocuserMotion(PortFD, finalDirection);
 
    IEAddTimer(duration, &LX200Telescope::updateFocusHelper, this);
 
    return IPS_BUSY;
}
 
bool LX200Telescope::SetFocuserSpeed(int speed)
{
    return (setFocuserSpeedMode(PortFD, speed) == 0);
}