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tuto-ccd.py
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tuto-ccd.py
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import PyIndi
import time
import sys
import threading
class IndiClient(PyIndi.BaseClient):
def __init__(self):
super(IndiClient, self).__init__()
def newDevice(self, d):
pass
def newProperty(self, p):
pass
def removeProperty(self, p):
pass
def newBLOB(self, bp):
global blobEvent
print("new BLOB ", bp.name)
blobEvent.set()
pass
def newSwitch(self, svp):
pass
def newNumber(self, nvp):
pass
def newText(self, tvp):
pass
def newLight(self, lvp):
pass
def newMessage(self, d, m):
pass
def serverConnected(self):
pass
def serverDisconnected(self, code):
pass
# connect the server
indiclient=IndiClient()
indiclient.setServer("localhost",7624)
if (not(indiclient.connectServer())):
print("No indiserver running on "+indiclient.getHost()+":"+str(indiclient.getPort())+" - Try to run")
print(" indiserver indi_simulator_telescope indi_simulator_ccd")
sys.exit(1)
# connect the scope
telescope="Telescope Simulator"
device_telescope=None
telescope_connect=None
# get the telescope device
device_telescope=indiclient.getDevice(telescope)
while not(device_telescope):
time.sleep(0.5)
device_telescope=indiclient.getDevice(telescope)
# wait CONNECTION property be defined for telescope
telescope_connect=device_telescope.getSwitch("CONNECTION")
while not(telescope_connect):
time.sleep(0.5)
telescope_connect=device_telescope.getSwitch("CONNECTION")
# if the telescope device is not connected, we do connect it
if not(device_telescope.isConnected()):
# Property vectors are mapped to iterable Python objects
# Hence we can access each element of the vector using Python indexing
# each element of the "CONNECTION" vector is a ISwitch
telescope_connect[0].s=PyIndi.ISS_ON # the "CONNECT" switch
telescope_connect[1].s=PyIndi.ISS_OFF # the "DISCONNECT" switch
indiclient.sendNewSwitch(telescope_connect) # send this new value to the device
# Now let's make a goto to vega
# Beware that ra/dec are in decimal hours/degrees
vega={'ra': (279.23473479 * 24.0)/360.0, 'dec': +38.78368896 }
# We want to set the ON_COORD_SET switch to engage tracking after goto
# device.getSwitch is a helper to retrieve a property vector
telescope_on_coord_set=device_telescope.getSwitch("ON_COORD_SET")
while not(telescope_on_coord_set):
time.sleep(0.5)
telescope_on_coord_set=device_telescope.getSwitch("ON_COORD_SET")
# the order below is defined in the property vector, look at the standard Properties page
# or enumerate them in the Python shell when you're developing your program
telescope_on_coord_set[0].s=PyIndi.ISS_ON # TRACK
telescope_on_coord_set[1].s=PyIndi.ISS_OFF # SLEW
telescope_on_coord_set[2].s=PyIndi.ISS_OFF # SYNC
indiclient.sendNewSwitch(telescope_on_coord_set)
# We set the desired coordinates
telescope_radec=device_telescope.getNumber("EQUATORIAL_EOD_COORD")
while not(telescope_radec):
time.sleep(0.5)
telescope_radec=device_telescope.getNumber("EQUATORIAL_EOD_COORD")
telescope_radec[0].value=vega['ra']
telescope_radec[1].value=vega['dec']
indiclient.sendNewNumber(telescope_radec)
# and wait for the scope has finished moving
while (telescope_radec.s==PyIndi.IPS_BUSY):
print("Scope Moving ", telescope_radec[0].value, telescope_radec[1].value)
time.sleep(2)
# Let's take some pictures
ccd="CCD Simulator"
device_ccd=indiclient.getDevice(ccd)
while not(device_ccd):
time.sleep(0.5)
device_ccd=indiclient.getDevice(ccd)
ccd_connect=device_ccd.getSwitch("CONNECTION")
while not(ccd_connect):
time.sleep(0.5)
ccd_connect=device_ccd.getSwitch("CONNECTION")
if not(device_ccd.isConnected()):
ccd_connect[0].s=PyIndi.ISS_ON # the "CONNECT" switch
ccd_connect[1].s=PyIndi.ISS_OFF # the "DISCONNECT" switch
indiclient.sendNewSwitch(ccd_connect)
ccd_exposure=device_ccd.getNumber("CCD_EXPOSURE")
while not(ccd_exposure):
time.sleep(0.5)
ccd_exposure=device_ccd.getNumber("CCD_EXPOSURE")
# Ensure the CCD simulator snoops the telescope simulator
# otherwise you may not have a picture of vega
ccd_active_devices=device_ccd.getText("ACTIVE_DEVICES")
while not(ccd_active_devices):
time.sleep(0.5)
ccd_active_devices=device_ccd.getText("ACTIVE_DEVICES")
ccd_active_devices[0].text="Telescope Simulator"
indiclient.sendNewText(ccd_active_devices)
# we should inform the indi server that we want to receive the
# "CCD1" blob from this device
indiclient.setBLOBMode(PyIndi.B_ALSO, ccd, "CCD1")
ccd_ccd1=device_ccd.getBLOB("CCD1")
while not(ccd_ccd1):
time.sleep(0.5)
ccd_ccd1=device_ccd.getBLOB("CCD1")
# a list of our exposure times
exposures=[1.0, 5.0]
# we use here the threading.Event facility of Python
# we define an event for newBlob event
blobEvent=threading.Event()
blobEvent.clear()
i=0
ccd_exposure[0].value=exposures[i]
indiclient.sendNewNumber(ccd_exposure)
while (i < len(exposures)):
# wait for the ith exposure
blobEvent.wait()
# we can start immediately the next one
if (i + 1 < len(exposures)):
ccd_exposure[0].value=exposures[i+1]
blobEvent.clear()
indiclient.sendNewNumber(ccd_exposure)
# and meanwhile process the received one
for blob in ccd_ccd1:
print("name: ", blob.name," size: ", blob.size," format: ", blob.format)
# pyindi-client adds a getblobdata() method to IBLOB item
# for accessing the contents of the blob, which is a bytearray in Python
fits=blob.getblobdata()
print("fits data type: ", type(fits))
# here you may use astropy.io.fits to access the fits data
# and perform some computations while the ccd is exposing
# but this is outside the scope of this tutorial
i+=1