Example#
Exposure test with real camera#
Start lvmcam.
$ poetry run container_start --kill --name=lvm.cam.real
In another terminal, start clu.
$ clu
In clu terminal, type following commands step-by-step.
$ clu
lvm.cam.real connect -v -n sci.agw
00:34:52.026 lvm.cam.real >
00:34:56.271 lvm.cam.real i {
"CAMERA": {
"name": "sci.agw",
"uid": "19283193"
}
}
00:34:56.282 lvm.cam.real :
lvm.cam.real expose -v -r 00h42m44s -d 41d16m09s -K 10 -f 1800 0.1 3 sci.agw
00:35:15.462 lvm.cam.real >
00:35:17.716 lvm.cam.real : {
"PATH": {
"0": "/home/mgjeon/lvmcam/python/lvmcam/assets/lvm/sci/agw/20211203/lvm.sci.agw-00000001.fits",
"1": "/home/mgjeon/lvmcam/python/lvmcam/assets/lvm/sci/agw/20211203/lvm.sci.agw-00000002.fits",
"2": "/home/mgjeon/lvmcam/python/lvmcam/assets/lvm/sci/agw/20211203/lvm.sci.agw-00000003.fits"
}
}
lvm.cam.real expose -v -r 00h42m44s -d 41d16m09s -K 10 -f 1800 1 3 sci.agw
00:35:22.831 lvm.cam.real >
00:35:27.655 lvm.cam.real : {
"PATH": {
"0": "/home/mgjeon/lvmcam/python/lvmcam/assets/lvm/sci/agw/20211203/lvm.sci.agw-00000004.fits",
"1": "/home/mgjeon/lvmcam/python/lvmcam/assets/lvm/sci/agw/20211203/lvm.sci.agw-00000005.fits",
"2": "/home/mgjeon/lvmcam/python/lvmcam/assets/lvm/sci/agw/20211203/lvm.sci.agw-00000006.fits"
}
}
If you start lvmcam with --debug option, you can see verbosity.
$ poetry run container_start --debug --kill --name=lvm.cam.real
[DEBUG]: [1.307 s]: find_all_available_cameras
[DEBUG]: [1.640 s]: async _connect_internal
[DEBUG]: [1.641 s]: async connect_available_camera
[DEBUG]: [1.253 s]: get_cam_dev_for_header
[DEBUG]: [0.599 s]: async _expose_internal
[DEBUG]: [0.596 s]: async _expose_internal
[DEBUG]: [0.595 s]: async _expose_internal
[DEBUG]: [2.234 s]: async expose_real_cam
[DEBUG]: [1.499 s]: async _expose_internal
[DEBUG]: [1.496 s]: async _expose_internal
[DEBUG]: [1.495 s]: async _expose_internal
[DEBUG]: [4.821 s]: async expose_real_cam
Exposure test with virtual camera#
Start lvmtan, lvmpwi, and skymakercam as follows.
For lvmtan:
$ git clone https://github.com/sdss/lvmtan
$ cd lvmtan
$ poetry install
$ poetry run container_start --name=lvm.all
For lvmpwi:
$ git clone https://github.com/sdss/lvmpwi
$ cd lvmpwi
$ poetry install
$ poetry run container_start --name=lvm.sci.pwi --simulator
For skymakercam:
$ sudo apt-get install -y libxcb-xinerama0
$ git clone https://github.com/sdss/skymakercam
$ cd skymakercam
$ poetry install
$ poetry run python utils/plot_skymakercam.py -v -c python/skymakercam/etc/cameras.yaml lvm.sci.agw.cam
Start lvmcam with --virtual option.
$ poetry run container_start --kill --virtual --name=lvm.cam.virtual
In another terminal, start clu.
$ clu
In clu terminal, type following commands step-by-step.
$ clu
lvm.cam.virtual connect -n lvm.sci.agw.cam
10:07:35.459 lvm.cam.virtual >
10:07:36.592 lvm.cam.virtual i {
"CAMERA": {
"name": "lvm.sci.agw.cam",
"uid": "lvm.sci.agw.cam"
}
}
10:07:36.603 lvm.cam.virtual :
lvm.cam.virtual expose -v -r 00h42m44s -d 41d16m09s -K 10 -f 1800 0.1 3 lvm.sci.agw.cam
10:07:52.756 lvm.cam.virtual >
10:07:57.813 lvm.cam.virtual : {
"PATH": {
"0": "/home/mgjeon/lvmcam/python/lvmcam/assets/test/20211214/lvm.lvm.sci.agw.cam-00000001.fits",
"1": "/home/mgjeon/lvmcam/python/lvmcam/assets/test/20211214/lvm.lvm.sci.agw.cam-00000002.fits",
"2": "/home/mgjeon/lvmcam/python/lvmcam/assets/test/20211214/lvm.lvm.sci.agw.cam-00000003.fits"
}
}
lvm.cam.virtual expose -v -r 00h42m44s -d 41d16m09s -K 10 -f 1800 1 3 lvm.sci.agw.cam
10:08:03.555 lvm.cam.virtual >
10:08:04.503 lvm.cam.virtual : {
"PATH": {
"0": "/home/mgjeon/lvmcam/python/lvmcam/assets/test/20211214/lvm.lvm.sci.agw.cam-00000004.fits",
"1": "/home/mgjeon/lvmcam/python/lvmcam/assets/test/20211214/lvm.lvm.sci.agw.cam-00000005.fits",
"2": "/home/mgjeon/lvmcam/python/lvmcam/assets/test/20211214/lvm.lvm.sci.agw.cam-00000006.fits"
}
}
If you start lvmcam with --debug option, you can see verbosity.
$ poetry run container_start --debug --kill --virtual --name=lvm.cam.virtual
[DEBUG]: [SKYCAMERASYSTEM]: read configuration file from /home/mgjeon/lvmcam/python/lvmcam/etc/cameras.yaml
[DEBUG]: [0.033 s]: find_all_available_cameras
[DEBUG]: [SKYCAMERASYSTEM]: adding camera 'lvm.sci.agw.cam' with parameters {'type': 'skymakercam', 'uid': 'lvm.sci.agw.cam',
'descr': 'Guider Camera Science', 'default': {'gain': 5.0, 'binning': [4, 4]}, 'instpar': 'lvm_sci_agw_cam',
'focus_stage': 'lvm.sci.foc', 'kmirror': 'lvm.sci.km', 'tcs': 'lvm.sci.pwi', 'catalog_path': '$HOME/data/catalog/gaia',
'pixsize': 9.0, 'pixscal': 8.92, 'connection': {'uid': '19283193', 'gain': 1.0, 'binning': [1, 1], 'autoconnect': True,
'bool': {'ReverseY': True, 'ReverseX': False, 'BlackLevelClampingEnable': False, 'GammaEnable': False},
'int': {'BinningHorizontalMode': 1, 'BinningVerticalMode': 1}, 'float': None, 'string': None}, 'shutter': False,
'extrahdr': [['TEST1', 9999, 'Extra header test 1'], ['TEST2', 999, 'Extra header test 2'], ['TESTHDR3', -1, 'Extra header test 3'],
['TESTHDR4', -2, 'Extra header test 4']], 'path': {'basename': 'lvm.{camera.name}-{num:08d}.fits',
'dirname': "test/{date.strftime('%Y%m%d')}", 'filepath': 'python/lvmcam/assets'}}
[DEBUG]: [LVM.SCI.AGW.CAM]: [1600, 1100]
[DEBUG]: [LVM.SCI.AGW.CAM]: connecting ...
[DEBUG]: [LVM.SCI.AGW.CAM]: camera connected.
[DEBUG]: [0.048 s]: async connect_available_camera
[DEBUG]: [LVM.SCI.AGW.CAM]: defocus 0.0
[DEBUG]: [LVM.SCI.AGW.CAM]: kmirror angle (deg): 0.0
[DEBUG]: [LVM.SCI.AGW.CAM]: separation 6.068631324108885
Gaia query: SELECT source_id, ra,dec,phot_g_mean_mag FROM gaiaedr3.gaia_source WHERE phot_g_mean_mag <= 17 AND 1=CONTAINS(POINT('ICRS',ra,dec),
CIRCLE('ICRS',48.198614693649,-58.535399463189, 0.692887394120578))
INFO: Query finished. [astroquery.utils.tap.core]
1163 stars found within 0.692887394120578 deg
[DEBUG]: [LVM.SCI.AGW.CAM]: defocus 0.0
[DEBUG]: [LVM.SCI.AGW.CAM]: kmirror angle (deg): 0.0
[DEBUG]: [LVM.SCI.AGW.CAM]: separation 1.5447622919059536
[DEBUG]: [LVM.SCI.AGW.CAM]: defocus 0.0
[DEBUG]: [LVM.SCI.AGW.CAM]: kmirror angle (deg): 0.0
[DEBUG]: [LVM.SCI.AGW.CAM]: separation 1.6575005324400047
[DEBUG]: [5.046 s]: async expose_cam
[DEBUG]: [LVM.SCI.AGW.CAM]: defocus 0.0
[DEBUG]: [LVM.SCI.AGW.CAM]: kmirror angle (deg): 0.0
[DEBUG]: [LVM.SCI.AGW.CAM]: separation 3.82851967502365
[DEBUG]: [LVM.SCI.AGW.CAM]: defocus 0.0
[DEBUG]: [LVM.SCI.AGW.CAM]: kmirror angle (deg): 0.0
[DEBUG]: [LVM.SCI.AGW.CAM]: separation 3.9465993299925985
[DEBUG]: [LVM.SCI.AGW.CAM]: defocus 0.0
[DEBUG]: [LVM.SCI.AGW.CAM]: kmirror angle (deg): 0.0
[DEBUG]: [LVM.SCI.AGW.CAM]: separation 4.062583024766025
[DEBUG]: [0.954 s]: async expose_cam
Test shot#
The --testshot or -t option in expose command makes one testshot.fits file that is always overwritten.
The NUM argument of expose is ignored.
$ clu
lvmcam connect
10:14:07.696 lvmcam >
10:14:08.828 lvmcam i {
"CAMERA": {
"name": "lvm.sci.agw.cam",
"uid": "lvm.sci.agw.cam"
}
}
10:14:08.842 lvmcam :
lvmcam expose -t 0.1 3 lvm.sci.agw.cam
10:14:15.496 lvmcam >
10:14:19.892 lvmcam : {
"PATH": {
"0": "/home/mgjeon/lvmcam/python/lvmcam/assets/testshot.fits"
}
}
lvmcam connect
10:14:26.887 lvmcam >
10:14:26.888 lvmcam e {
"error": "Cameras are already connected"
}
10:14:26.890 lvmcam f
lvmcam disconnect
10:14:29.898 lvmcam >
10:14:29.899 lvmcam i {
"text": "Cameras have been removed"
}
10:14:29.901 lvmcam :
Show commands#
The ‘Available’ means that the camera can be connected.
$ clu
lvmcam show all
10:14:55.454 lvmcam >
10:14:55.491 lvmcam i {
"ALL": {
"lvm.sci.agw.cam": "Available | uid: lvm.sci.agw.cam",
"sci.agw": "Unavailable | uid: 19283193",
"sci.age": "Unavailable | uid: 19283182",
"sci.agc": "Unavailable | uid: -100",
"skyw.agw": "Unavailable | uid: -2",
"skyw.age": "Unavailable | uid: -3",
"skyw.agc": "Unavailable | uid: -101",
"skye.agw": "Unavailable | uid: -4",
"skye.age": "Unavailable | uid: -5",
"skye.agc": "Unavailable | uid: -102",
"spec.agw": "Unavailable | uid: -6",
"spec.age": "Unavailable | uid: -7",
"spec.agc": "Unavailable | uid: -103"
}
}
10:14:55.507 lvmcam :
lvmcam show connection shows all connected cameras. This reply is similar to that of lvmcam connect.
$ clu
lvmcam show connection
10:15:19.205 lvmcam >
10:15:19.206 lvmcam e {
"error": "There are no connected cameras"
}
10:15:19.207 lvmcam f
lvmcam connect
10:15:24.475 lvmcam >
10:15:25.614 lvmcam i {
"CAMERA": {
"name": "lvm.sci.agw.cam",
"uid": "lvm.sci.agw.cam"
}
}
10:15:25.624 lvmcam :
lvmcam show connection
10:15:28.656 lvmcam >
10:15:28.657 lvmcam i {
"CONNECTED": {
"name": "lvm.sci.agw.cam",
"uid": "lvm.sci.agw.cam"
}
}
10:15:28.658 lvmcam :
Status command#
$ clu
lvmcam status
00:30:46.707 lvmcam >
00:30:48.080 lvmcam i {
"STATUS": {
"Camera model": "Blackfly S BFS-PGE-16S7M",
"Camera vendor": "FLIR",
"Camera id": "19283193",
"Pixel format": "Mono16",
"Available Formats": "['Mono8', 'Mono16', 'Mono10Packed', 'Mono12Packed', 'Mono10p', 'Mono12p']",
"Full Frame": "1608x1104",
"ROI": "1600x1100 at 0,0",
"Frame size": "3520000 Bytes",
"Frame rate": "3.392067663337556 Hz",
"Exposure time": "0.999999 seconds",
"Gain Conv.": "LCG",
"Gamma Enable": "False",
"Gamma Value": "0.800048828125",
"Acquisition mode": "SingleFrame",
"Framerate bounds": "(min=1.0, max=3.3953648380635064)",
"Exp. time bounds": "(min=14.0, max=30000003.0)",
"Gain bounds": "(min=0.0, max=47.994294033026364)",
"Power Supply Voltage": "9.76171875 V",
"Power Supply Current": "0.28369140625 A",
"Total Dissiapted Power": "2.716955542564392 W",
"Camera Temperature": "33.5 C"
}
}
00:30:48.088 lvmcam :
Extra header#
You can add an extra header in result fits file.
1. Using --header or -h option#
The --header option is passed ‘JSON header’ similar to archon. The rule for ‘JSON header’ is {Header1: (Value1, Comment1), Header2: (Value2, Comment2) ...}.
$ clu
lvmcam expose 0.1 1 sci.agw --header '{"HDRTEST1": (8888, "extra hdr TEST 1"), "HDRTEST2": ("test value", "test comment"), "HDRTEST3": (-8, "extra hdr test 3")}'
04:55:22.919 lvmcam >
04:55:23.617 lvmcam : {
"PATH": {
"0": "/home/mgjeon/lvmcam/python/lvmcam/assets/lvm/sci/agw/20211212/lvm.sci.agw-00000001.fits"
}
SIMPLE = T / conforms to FITS standard
BITPIX = 16 / array data type
NAXIS = 3 / number of array dimensions
NAXIS1 = 1600
NAXIS2 = 1100
NAXIS3 = 1
EXTEND = T
BSCALE = 1
BZERO = 32768
CAMNAME = 'sci.agw ' / Camera name
CAMUID = 19283193 / Camera UID
IMAGETYP= 'object ' / The image type of the file
EXPTIME = 0.1 / Exposure time of single integration [s]
DATE-OBS= '2021-12-12T04:55:59.912' / Date (in TIMESYS) the exposure started
PXFORMAT= 'Mono16 ' / Pixel format
FULLFRAM= '1608x1104' / Full Frame
ROI = '1600x1100 at 0,0' / ROI
FRAMSIZE= 3520000 / Frame size (Bytes)
FRAMRATE= 3.392067663337556 / Frame rate (Hz)
EXPTIME = 0.099996 / Exposure time (seconds)
GAINCONV= 'LCG ' / Gain Conv.
GAMMAENA= F / Gamma Enable
GAMMAVAL= 0.800048828125 / Gamma Value
ACQUIMOD= 'SingleFrame' / Acquisition mode
FRMRATBD= '(min=1.0, max=3.3953648380635064)' / Framerate bounds
EXPTIMBD= '(min=14.0, max=30000003.0)' / Exp. time bounds
GAINBD = '(min=0.0, max=47.994294033026364)' / Gain bounds
VOLTAGE = 9.7451171875 / Power Supply Voltage (V)
CURRENT = 0.18115234375 / Power Supply Current (A)
POWER = 1.23955225944519 / Total Dissiapted Power (W)
CAMTEMP = 38.5 / Camera Temperature (C)
HDRTEST1= 8888 / extra hdr TEST 1
HDRTEST2= 'test value' / test comment
HDRTEST3= -8 / extra hdr test 3
CHECKSUM= 'ZXnDcUl9ZUlCbUl9' / HDU checksum updated 2021-12-12T13:55:23
DATASUM = '2816880889' / data unit checksum updated 2021-12-12T13:55:23
END
2. Using --extraheader or -eh option#
The --extraheader option allows extrahdr in cameras.yaml to be added.
# cameras.yaml
cameras:
sci.agw:
name: "sci.agw"
...
extrahdr: [
['TEST1', 9999, "Extra header test 1"],
['TEST2', 999, "Extra header test 2"],
['TESTHDR3', -1, "Extra header test 3"],
['TESTHDR4', -2, "Extra header test 4"]
]
$ clu
lvmcam expose 0.1 1 sci.agw --extraheader
04:57:15.148 lvmcam >
04:57:15.850 lvmcam : {
"PATH": {
"0": "/home/mgjeon/lvmcam/python/lvmcam/assets/lvm/sci/agw/20211212/lvm.sci.agw-00000002.fits"
}
SIMPLE = T / conforms to FITS standard
BITPIX = 16 / array data type
NAXIS = 3 / number of array dimensions
NAXIS1 = 1600
NAXIS2 = 1100
NAXIS3 = 1
EXTEND = T
BSCALE = 1
BZERO = 32768
CAMNAME = 'sci.agw ' / Camera name
CAMUID = 19283193 / Camera UID
IMAGETYP= 'object ' / The image type of the file
EXPTIME = 0.1 / Exposure time of single integration [s]
DATE-OBS= '2021-12-12T04:57:52.146' / Date (in TIMESYS) the exposure started
PXFORMAT= 'Mono16 ' / Pixel format
FULLFRAM= '1608x1104' / Full Frame
ROI = '1600x1100 at 0,0' / ROI
FRAMSIZE= 3520000 / Frame size (Bytes)
FRAMRATE= 3.392067663337556 / Frame rate (Hz)
EXPTIME = 0.099996 / Exposure time (seconds)
GAINCONV= 'LCG ' / Gain Conv.
GAMMAENA= F / Gamma Enable
GAMMAVAL= 0.800048828125 / Gamma Value
ACQUIMOD= 'SingleFrame' / Acquisition mode
FRMRATBD= '(min=1.0, max=3.3953648380635064)' / Framerate bounds
EXPTIMBD= '(min=14.0, max=30000003.0)' / Exp. time bounds
GAINBD = '(min=0.0, max=47.994294033026364)' / Gain bounds
VOLTAGE = 9.7451171875 / Power Supply Voltage (V)
CURRENT = 0.264404296875 / Power Supply Current (A)
POWER = 2.065127372741699 / Total Dissiapted Power (W)
CAMTEMP = 38.625 / Camera Temperature (C)
TEST1 = 9999 / Extra header test 1
TEST2 = 999 / Extra header test 2
TESTHDR3= -1 / Extra header test 3
TESTHDR4= -2 / Extra header test 4
CHECKSUM= 'ReALSZ4LRb9LRZ9L' / HDU checksum updated 2021-12-12T13:57:15
DATASUM = '1576855900' / data unit checksum updated 2021-12-12T13:57:15
END
Compression#
The -c or --compress option is to choose one of the compression algorithms.
You can choose one of [‘NO’, ‘R1’, ‘RO’, ‘P1’, ‘G1’, ‘G2’, ‘H1’] that respectively represent [‘None’, ‘RICE_1’, ‘RICE_ONE’, ‘PLIO_1’, ‘GZIP_1’, ‘GZIP_2’, ‘HCOMPRESS_1’].
$ lvmcam start --debug
[DEBUG]: [0.997 s]: async _expose_internal
[DEBUG]: [1.101 s]: async expose_real_cam
[DEBUG]: [0.995 s]: async _expose_internal
[DEBUG]: [1.183 s]: async expose_real_cam
[DEBUG]: [0.996 s]: async _expose_internal
[DEBUG]: [1.170 s]: async expose_real_cam
[DEBUG]: [0.996 s]: async _expose_internal
[DEBUG]: [1.092 s]: async expose_real_cam
[DEBUG]: [0.996 s]: async _expose_internal
[DEBUG]: [1.225 s]: async expose_real_cam
[DEBUG]: [0.995 s]: async _expose_internal
[DEBUG]: [1.217 s]: async expose_real_cam
[DEBUG]: [0.995 s]: async _expose_internal
[DEBUG]: [1.178 s]: async expose_real_cam
$ clu
lvmcam connect
05:28:26.621 lvmcam >
05:28:30.889 lvmcam i {
"CAMERA": {
"name": "sci.agw",
"uid": "19283193"
}
}
lvmcam expose -v -c NO 0.5 1 sci.agw
05:28:59.416 lvmcam >
05:29:00.515 lvmcam : {
"PATH": {
"0": "/home/mgjeon/lvmcam/python/lvmcam/assets/lvm/sci/agw/20211212/lvm.sci.agw-00000001.fits"
}
}
lvmcam expose -v -c R1 0.5 1 sci.agw
05:29:06.219 lvmcam >
05:29:07.404 lvmcam : {
"PATH": {
"0": "/home/mgjeon/lvmcam/python/lvmcam/assets/lvm/sci/agw/20211212/lvm.sci.agw-00000002.fits"
}
}
lvmcam expose -v -c RO 0.5 1 sci.agw
05:29:11.742 lvmcam >
05:29:12.912 lvmcam : {
"PATH": {
"0": "/home/mgjeon/lvmcam/python/lvmcam/assets/lvm/sci/agw/20211212/lvm.sci.agw-00000003.fits"
}
}
lvmcam expose -v -c P1 0.5 1 sci.agw
05:29:17.297 lvmcam >
05:29:18.389 lvmcam : {
"PATH": {
"0": "data out of range for PLIO compression (0 - 2**24)"
}
}
lvmcam expose -v -c G1 0.5 1 sci.agw
05:29:24.555 lvmcam >
05:29:25.778 lvmcam : {
"PATH": {
"0": "/home/mgjeon/lvmcam/python/lvmcam/assets/lvm/sci/agw/20211212/lvm.sci.agw-00000004.fits"
}
}
lvmcam expose -v -c G2 0.5 1 sci.agw
05:29:29.583 lvmcam >
05:29:30.801 lvmcam : {
"PATH": {
"0": "/home/mgjeon/lvmcam/python/lvmcam/assets/lvm/sci/agw/20211212/lvm.sci.agw-00000005.fits"
}
}
lvmcam expose -v -c H1 0.5 1 sci.agw
05:29:35.534 lvmcam >
05:29:36.712 lvmcam : {
"PATH": {
"0": "/home/mgjeon/lvmcam/python/lvmcam/assets/lvm/sci/agw/20211212/lvm.sci.agw-00000006.fits"
}
}
$ ls -alh
total 14M
drwxrwxr-x 2 mgjeon mgjeon 4.0K Dec 12 14:29 .
drwxrwxr-x 5 mgjeon mgjeon 4.0K Dec 12 14:26 ..
-rw-rw-r-- 1 mgjeon mgjeon 3.4M Dec 12 14:29 lvm.sci.agw-00000001.fits
-rw-rw-r-- 1 mgjeon mgjeon 2.3M Dec 12 14:29 lvm.sci.agw-00000002.fits
-rw-rw-r-- 1 mgjeon mgjeon 2.3M Dec 12 14:29 lvm.sci.agw-00000003.fits
-rw-rw-r-- 1 mgjeon mgjeon 1.9M Dec 12 14:29 lvm.sci.agw-00000004.fits
-rw-rw-r-- 1 mgjeon mgjeon 1.8M Dec 12 14:29 lvm.sci.agw-00000005.fits
-rw-rw-r-- 1 mgjeon mgjeon 1.7M Dec 12 14:29 lvm.sci.agw-00000006.fits
Docker#
Clone the lvmcam repository.
$ git clone https://github.com/sdss/lvmcam
$ cd lvmcam
$ poetry install
Run container.
$ poetry run container_start
Run container with killing current instance.
$ poetry run container_start --kill
Run container with custom name (default name = lvm.cam).
$ poetry run container_start --name=lvm.cam.sci.agw
Run container with lvmcam debug mode.
$ poetry run container_start --debug
Run container with virtual camera (skymakercam) mode.
$ poetry run container_start --virtual
Run multiple containers.
$ poetry run container_start --name=lvm.cam.sci.agw
$ poetry run container_start --name=lvm.cam.sci.age
$ poetry run container_start --name=lvm.cam.sci.agc
Build.
$ poetry run container_build
Build from scratch.
$ poetry run container_build --no-cache
cluplus#
from clu.client import AMQPClient
from cluplus.proxy import Proxy
amqpc = AMQPClient(name="my_client")
_foc = Proxy(amqpc, "lvm.cam.virtual")
_foc.start()
# print(_foc.ping())
# print(_foc.help())
# print(_foc.version())
print(_foc.show("all"))
print(_foc.connect(name="lvm.sci.agw.cam"))
print(_foc.expose(0.5, 3, "lvm.sci.agw.cam", verbose="", compress="R1"))
print(_foc.show("connection"))
print(_foc.disconnect())