ioptronv3driver.cpp

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/*
    INDI IOptron v3 Driver for firmware version 20171001 or later.
 
    Copyright (C) 2018 Jasem Mutlaq
 
    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 "ioptronv3driver.h"
#include "indicom.h"
 
#include <libnova/julian_day.h>
#include <cinttypes>
 
#include <cmath>
#include <cstring>
#include <termios.h>
#include <unistd.h>
 
namespace IOPv3
{
 
const std::map<std::string, std::string> Driver::models =
{
    {"0010", "SkyHunter EQ"},
    {"0011", "SkyHunter AA"},
    {"0012", "HAE16 EQ"},
    {"0013", "HAE16 AA"},
    {"0014", "HAE18 EQ"},
    {"0015", "HEM15"},
    {"0022", "HAE18 AA"},
    {"0025", "HEM27"},
    {"0026", "CEM26"},
    {"0027", "CEM26-EC"},
    {"0028", "GEM28"},
    {"0029", "GEM28-EC"},
    {"0030", "HEM27-EC"},
    {"0031", "HAE29 EQ"},
    {"0032", "HAE29-EC AA"},
    {"0033", "HAE29 AA"},
    {"0034", "HAE29-EC AA"},
    {"0035", "HAZ31"},
    {"0036", "HAE29C EQ"},
    {"0037", "HAE29C-EC EQ"},
    {"0038", "HAE29C AA"},
    {"0039", "HAE29C-EC EQ"},
    {"0040", "CEM40"},
    {"0041", "CEM40-EC"},
    {"0043", "GEM45"},
    {"0045", "HEM44-EC"},
    {"0046", "HEM44A"},
    {"0047", "HEM44A-EC"},
    {"0048", "HAE43 EQ"},
    {"0049", "HAE43-EC EQ"},
    {"0050", "HAE43 AA"},
    {"0051", "HAE43-EC AA"},
    {"0052", "HAZ46"},
    {"0053", "HAE43C EQ"},
    {"0054", "HAE43C-EC EQ"},
    {"0055", "HAE43C AA"},
    {"0056", "HAE43C-EC AA"},
    {"0060", "CEM60"},
    {"0061", "CEM60-EC"},
    {"0062", "HAE69 EQ"},
    {"0063", "HAZ69-EC EQ"},
    {"0064", "HAE69 AA"},
    {"0065", "HAE69-EC AA"},
    {"0066", "HAE69C EQ"},
    {"0067", "HAE69C-EC EQ"},
    {"0068", "HAE69C AA"},
    {"0069", "HAE69C-EC AA"},
    {"0070", "CEM70"},
    {"0071", "CEM70-EC"},
    {"0072", "CEM70-EC2"},
    {"0073", "HAZ71"},
    {"0120", "CEM120"},
    {"0121", "CEM120-EC"},
    {"0122", "CEM120-EC2"},
    {"5010", "Cube II AA"},
    {"5035", "AZ Mount Pro"},
    {"5045", "iEQ45 Pro AA"}
};
 
const uint16_t Driver::IOP_SLEW_RATES[] = {1, 2, 8, 16, 64, 128, 256, 512, 1024};
 
Driver::Driver(const char *deviceName): m_DeviceName(deviceName) {}
 
bool Driver::sendCommandOk(const char *command)
{
    char res[IOP_BUFFER] = {0};
 
    if (sendCommand(command, 1, res))
        return res[0] == '1';
 
    return false;
}
 
bool Driver::sendCommand(const char *command,
                         int count,
                         char *response,
                         int minimumCount,
                         uint8_t timeout,
                         uint8_t debugLog)
{
    int errCode = 0;
    int nbytes_read    = 0;
    int nbytes_written = 0;
    char errMsg[MAXRBUF];
    char res[IOP_BUFFER] = {0};
 
    DEBUGFDEVICE(m_DeviceName, debugLog, "CMD <%s>", command);
 
    if (m_Simulation)
        return true;
 
    // Try to dispatch command and read twice in case of timeouts.
    for (int i = 0; i < 2; i++)
    {
        tcflush(PortFD, TCIOFLUSH);
 
        if ((errCode = tty_write(PortFD, command, strlen(command), &nbytes_written)) != TTY_OK)
        {
            tty_error_msg(errCode, errMsg, MAXRBUF);
            DEBUGFDEVICE(m_DeviceName, INDI::Logger::DBG_ERROR, "Write Command Error: %s", errMsg);
            return false;
        }
 
        if (count == 0)
            return true;
 
        if (count == -1)
            errCode = tty_read_section(PortFD, res, '#', timeout, &nbytes_read);
        else
            errCode = tty_read(PortFD, res, count, timeout, &nbytes_read);
 
        if (errCode == TTY_OK && (minimumCount < 0 || minimumCount <= count))
            break;
    }
 
    if (errCode != TTY_OK)
    {
        tty_error_msg(errCode, errMsg, MAXRBUF);
        DEBUGFDEVICE(m_DeviceName, INDI::Logger::DBG_ERROR, "Read Command Error: %s", errMsg);
        return false;
    }
 
    // Remove the extra #
    if (count == -1)
        res[nbytes_read - 1] = 0;
 
    DEBUGFDEVICE(m_DeviceName, debugLog, "RES <%s>", res);
 
    tcflush(PortFD, TCIOFLUSH);
 
    // Copy response to buffer
    if (response)
        snprintf(response, IOP_BUFFER, "%s", res);
 
    return true;
}
 
bool Driver::checkConnection(int fd)
{
    char res[IOP_BUFFER] = {0};
 
    DEBUGDEVICE(m_DeviceName, INDI::Logger::DBG_DEBUG, "Initializing IOptron using :MountInfo# CMD...");
 
    // Set FD for use
    PortFD = fd;
 
    if (m_Simulation)
        return true;
 
    for (int i = 0; i < 2; i++)
    {
        if (sendCommand(":MountInfo#", 4, res, -1, 3) == false)
        {
            usleep(50000);
            continue;
        }
 
        return true;
    }
 
    return false;
    DEBUGDEVICE(m_DeviceName, INDI::Logger::DBG_DEBUG, res);
}
 
void Driver::setDebug(bool enable)
{
    m_Debug = enable;
}
 
void Driver::setSimulation(bool enable)
{
    m_Simulation = enable;
 
    simData.ra_guide_rate = 0.5;
    simData.de_guide_rate = 0.5;
    simData.pier_state = IOP_PIER_WEST;
    simData.cw_state = IOP_CW_NORMAL;
    simData.JD = ln_get_julian_from_sys();
    simData.utc_offset_minutes = 3 * 60;
    simData.day_light_saving = false;
    simData.mb_state = IOP_MB_FLIP;
    simData.mb_limit = 3;
 
    simData.simInfo.gpsStatus = GPS_DATA_OK;
    simData.simInfo.hemisphere = HEMI_NORTH;
    simData.simInfo.slewRate = SR_6;
    simData.simInfo.timeSource = TS_GPS;
    simData.simInfo.trackRate = TR_SIDEREAL;
    simData.simInfo.longitude = 48.1;
    simData.simInfo.latitude  = 29.5;
}
 
void Driver::setSimGPSstatus(IOP_GPS_STATUS value)
{
    simData.simInfo.gpsStatus = value;
}
 
void Driver::setSimSytemStatus(IOP_SYSTEM_STATUS value)
{
    simData.simInfo.systemStatus = value;
}
 
void Driver::setSimTrackRate(IOP_TRACK_RATE value)
{
    simData.simInfo.trackRate = value;
}
 
void Driver::setSimSlewRate(IOP_SLEW_RATE value)
{
    simData.simInfo.slewRate = value;
}
 
void Driver::setSimTimeSource(IOP_TIME_SOURCE value)
{
    simData.simInfo.timeSource = value;
}
 
void Driver::setSimHemisphere(IOP_HEMISPHERE value)
{
    simData.simInfo.hemisphere = value;
}
 
void Driver::setSimRA(double ra)
{
    simData.ra = ra;
}
 
void Driver::setSimDE(double de)
{
    simData.de = de;
}
 
void Driver::setSimGuideRate(double raRate, double deRate)
{
    simData.ra_guide_rate = raRate;
    simData.de_guide_rate = deRate;
}
 
void Driver::setSimLongLat(double longitude, double latitude)
{
    simData.simInfo.longitude = longitude;
    simData.simInfo.latitude  = latitude;
}
 
bool Driver::getStatus(IOPInfo *info)
{
    char res[IOP_BUFFER] = {0};
 
    if (m_Simulation)
    {
        int iopLongitude = simData.simInfo.longitude * 360000;
        int iopLatitude  = (simData.simInfo.latitude + 90) * 360000;
        snprintf(res, IOP_BUFFER, "%c%08d%08d%d%d%d%d%d%d", simData.simInfo.longitude > 0 ? '+' : '-',
                 iopLongitude, iopLatitude, simData.simInfo.gpsStatus, simData.simInfo.systemStatus, simData.simInfo.trackRate,
                 simData.simInfo.slewRate, simData.simInfo.timeSource, simData.simInfo.hemisphere);
    }
    else if (sendCommand(":GLS#", -1, res, 23) == false)
        return false;
 
 
    if (strlen(res) != 23)
    {
        DEBUGFDEVICE(m_DeviceName, INDI::Logger::DBG_ERROR, "%s: Expected 23 bytes but received %d.", __PRETTY_FUNCTION__,
                     strlen(res));
        return false;
    }
 
    char longPart[16] = {0}, latPart[16] = {0};
    snprintf(longPart, sizeof(longPart), "%.9s", res);
    snprintf(latPart, sizeof(latPart), "%.8s", res + 9);
 
    int arcsecLongitude = atoi(longPart);
    int arcsecLatitude  = atoi(latPart);
 
    info->longitude    = arcsecLongitude / 360000.0;
    info->latitude     = arcsecLatitude / 360000.0 - 90.0;
    info->gpsStatus    = static_cast<IOP_GPS_STATUS>(res[17] - '0');
    info->systemStatus = static_cast<IOP_SYSTEM_STATUS>(res[18] - '0');
    info->trackRate    = static_cast<IOP_TRACK_RATE>(res[19] - '0');
    info->slewRate     = static_cast<IOP_SLEW_RATE>(res[20] - '0');
    info->timeSource   = static_cast<IOP_TIME_SOURCE>(res[21] - '0');
    info->hemisphere   = static_cast<IOP_HEMISPHERE>(res[22] - '0');
 
    return true;
}
 
bool Driver::getFirmwareInfo(FirmwareInfo *info)
{
    bool rc1 = getModel(info->Model);
 
    bool rc2 = getMainFirmware(info->MainBoardFirmware, info->ControllerFirmware);
 
    bool rc3 = getRADEFirmware(info->RAFirmware, info->DEFirmware);
 
    return (rc1 && rc2 && rc3);
}
 
bool Driver::getModel(std::string &model)
{
    char res[IOP_BUFFER] = {0};
 
    if (m_Simulation)
        strcpy(res, "0120");
    else if (sendCommand(":MountInfo#", 4, res) == false)
        return false;
 
    if (models.find(res) != models.end())
        model = models.at(res);
    else
        model = "Unknown";
 
    return true;
}
 
bool Driver::getMainFirmware(std::string &mainFirmware, std::string &controllerFirmware)
{
    char res[IOP_BUFFER] = {0};
 
    if (m_Simulation)
        strcpy(res, "180321171001");
    else if (sendCommand(":FW1#", -1, res) == false)
        return false;
 
    char mStr[16] = {0}, cStr[16] = {0};
    snprintf(mStr, sizeof(mStr), "%.6s", res);
    snprintf(cStr, sizeof(cStr), "%.6s", res + 6);
 
    mainFirmware = mStr;
    controllerFirmware = cStr;
 
    return true;
}
 
bool Driver::getRADEFirmware(std::string &RAFirmware, std::string &DEFirmware)
{
    char res[IOP_BUFFER] = {0};
 
    if (m_Simulation)
        strcpy(res, "140324140101");
    else if (sendCommand(":FW2#", -1, res) == false)
        return false;
 
    char mStr[16] = {0}, cStr[16] = {0};
    snprintf(mStr, sizeof(mStr), "%.6s", res);
    snprintf(cStr, sizeof(cStr), "%.6s", res + 6);
 
    RAFirmware = mStr;
    DEFirmware = cStr;
 
    return true;
}
 
bool Driver::startMotion(IOP_DIRECTION dir)
{
    switch (dir)
    {
        case IOP_N:
            return sendCommand(":mn#", 0);
        case IOP_S:
            return sendCommand(":ms#", 0);
        // JM 2020-10-12
        // We are reversing this since CEM120 moves CW when commanded WEST
        // leading to INCREASING RA, when it is expected to move CCW leading
        // to DECREASING RA
        case IOP_W:
            return sendCommand(":me#", 0);
        case IOP_E:
            return sendCommand(":mw#", 0);
    }
 
    return false;
}
 
bool Driver::stopMotion(IOP_DIRECTION dir)
{
    switch (dir)
    {
        case IOP_N:
        case IOP_S:
            return sendCommandOk(":qD#");
 
        case IOP_W:
        case IOP_E:
            return sendCommandOk(":qR#");
    }
 
    return false;
}
 
bool Driver::findHome()
{
    return sendCommandOk(":MSH#");
}
 
bool Driver::gotoHome()
{
    return sendCommandOk(":MH#");
}
 
bool Driver::setCurrentHome()
{
    return sendCommandOk(":SZP#");
}
 
/* v3.0 Added in control for PEC , Train and Data Integrity */
bool Driver::setPECEnabled(bool enabled)
{
    // JM 2024.10.11: Changed to direct command without waiting for response.
    return sendCommand(enabled ? ":SPP1#" : ":SPP0#");
}
 
bool Driver::setPETEnabled(bool enabled)
{
    return sendCommandOk(enabled ? ":SPR1#" : ":SPR0#");
}
 
bool Driver::getPETEnabled(bool enabled)
{
    char res[IOP_BUFFER] = {0};
    //  If enabled true then check data quality -> :GPE#
    //  If enabled false then check if training -> :GPR#
    if(enabled)
    {
        if (sendCommand(":GPE#", 1, res))
        {
            if (res[0] == '1')
            {
                return true;
            }
        }
    }
    else
    {
        if (sendCommand(":GPR#", 1, res))
        {
            if (res[0] == '1')
            {
                return true;
            }
        }
    }
    return false;
}
// End Mod */
 
bool Driver::setSlewRate(IOP_SLEW_RATE rate)
{
    char cmd[IOP_BUFFER] = {0};
    snprintf(cmd, IOP_BUFFER, ":SR%u#", static_cast<uint32_t>(rate + 1));
 
    simData.simInfo.slewRate = rate;
 
    return sendCommandOk(cmd);
}
 
bool Driver::setTrackMode(IOP_TRACK_RATE rate)
{
    simData.simInfo.trackRate = rate;
 
    switch (rate)
    {
        case TR_SIDEREAL:
            return sendCommandOk(":RT0#");
        case TR_LUNAR:
            return sendCommandOk(":RT1#");
        case TR_SOLAR:
            return sendCommandOk(":RT2#");
        case TR_KING:
            return sendCommandOk(":RT3#");
        case TR_CUSTOM:
            return sendCommandOk(":RT4#");
    }
 
    return false;
}
 
bool Driver::setCustomRATrackRate(double rate)
{
    if (rate < 0.1 || rate > 1.9)
        return false;
 
    char cmd[IOP_BUFFER] = {0};
    snprintf(cmd, IOP_BUFFER, ":RR%05u#", static_cast<uint32_t>(rate * 10000));
 
    return sendCommandOk(cmd);
}
 
bool Driver::setGuideRate(double RARate, double DERate)
{
    if (RARate < 0.01 || RARate > 0.9 || DERate < 0.01 || DERate > 0.9)
        return false;
 
    char cmd[IOP_BUFFER] = {0};
    snprintf(cmd, IOP_BUFFER, ":RG%02u%02u#", static_cast<uint32_t>(RARate * 100), static_cast<uint32_t>(DERate * 100));
 
    return sendCommandOk(cmd);
}
 
bool Driver::getGuideRate(double *RARate, double *DERate)
{
    char res[IOP_BUFFER] = {0};
 
    if (m_Simulation)
        snprintf(res, IOP_BUFFER, "%02u%02u", static_cast<uint32_t>(simData.ra_guide_rate * 100),
                 static_cast<uint32_t>(simData.de_guide_rate * 100));
    else if (sendCommand(":AG#", -1, res) == false)
        return false;
 
    char raStr[8] = {0}, deStr[8] = {0};
    snprintf(raStr, sizeof(raStr), "%.2s", res);
    snprintf(deStr, sizeof(deStr), "%.2s", res + 2);
 
    *RARate = atoi(raStr) / 100.0;
    *DERate = atoi(deStr) / 100.0;
 
    return true;
}
 
bool Driver::startGuide(IOP_DIRECTION dir, uint32_t ms)
{
    char cmd[IOP_BUFFER] = {0};
    char dir_c = 0;
 
    switch (dir)
    {
        // Dec+
        case IOP_N:
            dir_c = 'E';
            break;
 
        // Dec-
        case IOP_S:
            dir_c = 'C';
            break;
 
        // RA-
        case IOP_W:
            dir_c = 'Q';
            break;
 
        // RA+
        case IOP_E:
            dir_c = 'S';
            break;
    }
 
    snprintf(cmd, IOP_BUFFER, ":Z%c%05u#", dir_c, ms);
 
    return sendCommand(cmd, 0);
}
 
bool Driver::park()
{
    return sendCommandOk(":MP1#");
}
 
bool Driver::unpark()
{
    //NB: This command only available in CEM120 series, CEM60 series, iEQ45 Pro, iEQ45 Pro
    //AA and iEQ30 Pro.
    setSimSytemStatus(ST_STOPPED);
    return sendCommandOk(":MP0#");
}
 
bool Driver::setParkAz(double az)
{
    char cmd[IOP_BUFFER] = {0};
 
    // Send as 0.01 arcsec resolution
    int ieqValue = static_cast<int>(az * 60 * 60 * 100);
 
    snprintf(cmd, IOP_BUFFER, ":SPA%09d#", ieqValue);
 
    return sendCommandOk(cmd);
}
 
bool Driver::setParkAlt(double alt)
{
    char cmd[IOP_BUFFER] = {0};
 
    alt = std::max(0.0, alt);
 
    // Send as 0.01 arcsec resolution
    int ieqValue = static_cast<int>(alt * 60 * 60 * 100);
    snprintf(cmd, IOP_BUFFER, ":SPH%08d#", ieqValue);
    return sendCommandOk(cmd);
}
 
bool Driver::abort()
{
    if (simData.simInfo.systemStatus == ST_SLEWING)
        simData.simInfo.systemStatus =  simData.simInfo.rememberSystemStatus;
 
    return sendCommandOk(":Q#");
}
 
bool Driver::slewNormal()
{
    simData.simInfo.rememberSystemStatus = simData.simInfo.systemStatus;
    simData.simInfo.systemStatus = ST_SLEWING;
 
    return sendCommandOk(":MS1#");
}
 
bool Driver::slewCWUp()
{
    simData.simInfo.rememberSystemStatus = simData.simInfo.systemStatus;
    simData.simInfo.systemStatus = ST_SLEWING;
 
    return sendCommandOk(":MS2#");
}
 
bool Driver::sync()
{
    return sendCommand(":CM#", 1);
}
 
bool Driver::setTrackEnabled(bool enabled)
{
    simData.simInfo.systemStatus = enabled ? ST_TRACKING_PEC_ON : ST_STOPPED;
    char cmd[IOP_BUFFER] = {0};
    snprintf(cmd, IOP_BUFFER, ":ST%d#", enabled ? 1 : 0);
 
    return sendCommand(cmd);
}
 
bool Driver::setRA(double ra)
{
    // Send RA in centi-arcsecond (0.01) resolution.
    // ra is passed as hours. casRA is in centi-arcseconds in degrees.
    uint32_t casRA = ra * 15 * 60 * 60 * 100;
 
    simData.ra = ra;
 
    char cmd[IOP_BUFFER] = {0};
    snprintf(cmd, IOP_BUFFER, ":SRA%09u#", casRA);
 
    return sendCommandOk(cmd);
}
 
bool Driver::setDE(double de)
{
    // Send DE in centi-arcsecond (0.01) resolution.
    // de is passed as degrees. casDE is in centi-arcseconds in degrees.
    uint32_t casDE = fabs(de) * 60 * 60 * 100;
 
    simData.de = de;
 
    char cmd[IOP_BUFFER] = {0};
    snprintf(cmd, IOP_BUFFER, ":Sd%c%08u#", de >= 0 ? '+' : '-', casDE);
 
    return sendCommandOk(cmd);
}
 
bool Driver::setLongitude(double longitude)
{
    uint32_t casLongitude = fabs(longitude) * 60 * 60 * 100;
 
    simData.simInfo.longitude = longitude;
 
    char cmd[IOP_BUFFER] = {0};
    snprintf(cmd, IOP_BUFFER, ":SLO%c%08u#", longitude >= 0 ? '+' : '-', casLongitude);
 
    return sendCommandOk(cmd);
}
 
bool Driver::setLatitude(double latitude)
{
    uint32_t casLatitude = fabs(latitude) * 60 * 60 * 100;
 
    simData.simInfo.latitude = latitude;
 
    char cmd[IOP_BUFFER] = {0};
    snprintf(cmd, IOP_BUFFER, ":SLA%c%08u#", latitude >= 0 ? '+' : '-', casLatitude);
 
    return sendCommandOk(cmd);
}
 
bool Driver::setUTCDateTime(double JD)
{
    uint64_t msJD = (JD - J2000) * 8.64e+7;
 
    char cmd[IOP_BUFFER] = {0};
    snprintf(cmd, IOP_BUFFER, ":SUT%013" PRIu64 "#", msJD);
 
    simData.JD = JD;
 
    return sendCommandOk(cmd);
}
 
bool Driver::setUTCOffset(int offsetMinutes)
{
    char cmd[IOP_BUFFER] = {0};
    snprintf(cmd, IOP_BUFFER, ":SG%c%03d#", offsetMinutes >= 0 ? '+' : '-', abs(offsetMinutes));
 
    simData.utc_offset_minutes = offsetMinutes;
 
    return sendCommandOk(cmd);
}
 
bool Driver::setDaylightSaving(bool enabled)
{
    char cmd[IOP_BUFFER] = {0};
    snprintf(cmd, IOP_BUFFER, ":SDS%c#", enabled ? '1' : '0');
 
    simData.day_light_saving = enabled;
 
    return sendCommandOk(cmd);
}
 
bool Driver::getCoords(double *ra, double *de, IOP_PIER_STATE *pierState, IOP_CW_STATE *cwState)
{
    char res[IOP_BUFFER] = {0};
    if (m_Simulation)
    {
        snprintf(res, IOP_BUFFER, "%c%08u%09u%d%d", (simData.de >= 0 ? '+' : '-'),
                 static_cast<uint32_t>(fabs(simData.de) * 60 * 60 * 100),
                 static_cast<uint32_t>(simData.ra * 15 * 60 * 60 * 100), simData.pier_state, simData.cw_state);
    }
    else if (sendCommand(":GEP#", -1, res, 20, IOP_TIMEOUT, INDI::Logger::DBG_EXTRA_1) == false)
        return false;
 
    if (strlen(res) != 20)
    {
        DEBUGFDEVICE(m_DeviceName, INDI::Logger::DBG_ERROR, "%s: Expected 20 bytes but received %d.", __PRETTY_FUNCTION__,
                     strlen(res));
        return false;
    }
 
    char deStr[16] = {0}, raStr[16] = {0};
 
    strncpy(deStr, res, 9);
    snprintf(raStr, sizeof(raStr), "%.9s", res + 9);
 
    try
    {
        *de = std::atoi(deStr) / (60.0 * 60.0 * 100.0);
        *ra = std::atoi(raStr) / (15.0 * 60.0 * 60.0 * 100.0);
    }
    catch(...)
    {
        DEBUGFDEVICE(m_DeviceName, INDI::Logger::DBG_ERROR, "Failed to parse coordinates RA: %s DE: %s", raStr, deStr);
        return false;
    }
 
    *pierState = static_cast<IOP_PIER_STATE>(res[18] - '0');
    *cwState   = static_cast<IOP_CW_STATE>(res[19] - '0');
 
    return true;
}
 
bool Driver::getUTCDateTime(double *JD, int *utcOffsetMinutes, bool *dayLightSaving)
{
    char res[IOP_BUFFER] = {0};
    if (m_Simulation)
    {
        snprintf(res, IOP_BUFFER, "%c%03d%c%013" PRIu64, (simData.utc_offset_minutes >= 0 ? '+' : '-'),
                 abs(simData.utc_offset_minutes),
                 (simData.day_light_saving ? '1' : '0'), static_cast<uint64_t>((simData.JD - J2000) * 8.64e+7));
    }
    else if (sendCommand(":GUT#", -1, res, 18) == false)
        return false;
 
    if (strlen(res) != 18)
    {
        DEBUGFDEVICE(m_DeviceName, INDI::Logger::DBG_ERROR, "%s: Expected 18 bytes but received %d.", __PRETTY_FUNCTION__,
                     strlen(res));
        return false;
    }
 
    char offsetStr[16] = {0}, JDStr[16] = {0};
 
    strncpy(offsetStr, res, 4);
    snprintf(JDStr, sizeof(JDStr), "%.13s", res + 5);
 
    *utcOffsetMinutes = atoi(offsetStr);
    *dayLightSaving   = (res[4] == '1');
 
    try
    {
        uint64_t iopJD = std::stoull(JDStr);
        *JD = (iopJD / 8.64e+7) + J2000;
    }
    catch(...)
    {
        DEBUGFDEVICE(m_DeviceName, INDI::Logger::DBG_ERROR, "Failed to parse JD String: %s", JDStr);
        return false;
    }
 
    return true;
}
 
bool Driver::getMeridianBehavior(IOP_MB_STATE &action, uint8_t &degrees)
{
    char res[IOP_BUFFER] = {0};
    if (m_Simulation)
    {
        snprintf(res, IOP_BUFFER, "%d%02d", simData.mb_state, simData.mb_limit);
    }
    else if (sendCommand(":GMT#", -1, res) == false)
        return false;
 
    try
    {
        action = static_cast<IOP_MB_STATE>(res[0] - '0');
        degrees = std::stoi(res + 1);
    }
    catch(...)
    {
        DEBUGFDEVICE(m_DeviceName, INDI::Logger::DBG_ERROR, "Failed to parse MF Behavior: %s", res);
        return false;
    }
    return true;
}
 
bool Driver::setMeridianBehavior(IOP_MB_STATE action, uint8_t degrees)
{
    if (m_Simulation)
    {
        simData.mb_state = action;
        simData.mb_limit = degrees;
        return true;
    }
    else
    {
        char cmd[IOP_BUFFER] = {0};
        snprintf(cmd, IOP_BUFFER, ":SMT%d%02d#", action, degrees);
        return sendCommandOk(cmd);
    }
}
 
}