Hi Juanjo

I have succeeded in getting the ST-7 recognized by INDI SBIG Librally by installing the SBIG Parport Driver.

SBIG Parallel Port cameras
github.com/worlickwerx/pi-parport/wiki/S...arallel-Port-cameras

To use sbig-parport repo
github.com/worlickwerx/sbig-parport
clone the udev rule installation instructions

$ cd . /Downloads/sbig-parport-master/driver
$ make
$ sudo make install
Just in case "depmod" seems to be skipped during installation
$ sudo depmod -a

and then load the sbig-parport (and parport-gpio) module.

$ sudo insmod /usr/lib/modules/x.xx.x-xx-generic/extra/sbiglpt.ko
( sudo find / -name sbiglpt* → x.xx.x-xx )

When sbiglpt gets the parallel port, Kernel Modules on HardInfo will be told

sbiglpt

appears in Kernel Modules on HardInfo, and SBIG-enabled applications based on the SBIG SDK will detect the LPT1 camera.

Conflicts with other modules
Check HardInfo to make sure that the lp and ppdev drivers are not loaded at the same time as sbiglpt.
( $ sudo apt install hardinfo )
You may want to add the module to the blacklist in advance.
Edit blacklist.conf.

$ sudo nano /etc/modprobe.d/blacklist.conf

Add the contents of "blacklist-lp.conf" in the /modprobe directory of the repository as a reference.

# sbiglpt cannod load if lp device driver claims the only parallel port
blacklist lp
blacklist ppdev

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