Make the package instead of bare module.

linak_ctrl/__init__.py

@@ -111,6 +111,10 @@ class LinakDevice:
     def __init__(self):
         self._dev = usb.core.find(idVendor=LinakDevice.VEND,
                                   idProduct=LinakDevice.PROD)
+        if not self._dev:
+            raise ValueError(f'Device {LinakDevice.VEND}:'
+                             f'{LinakDevice.PROD:04d} '
+                             f'not found!')
 
         # detach kernel driver, if attached
         if self._dev.is_kernel_driver_active(0):
@@ -188,7 +192,11 @@ class LinakDevice:
 
 
 def main():
-    device = LinakDevice()
+    try:
+        device = LinakDevice()
+    except ValueError as ex:
+        sys.stderr.write(ex.args[0] + '\n')
+        sys.exit(1)
 
     parser = argparse.ArgumentParser('An utility to interact with USB2LIN06 '
                                      'device.')

setup.cfg

@@ -4,7 +4,7 @@ summary = Control Linak powered desks using USB2LIN06 cable.
 description-file = README.rst
 author = Roman Dobosz
 author-email = gryf73@gmail.com
-home-page = https://gihtub.com/gryf/linak-ctrl
+home-page = https://github.com/gryf/linak-ctrl
 license = BSD
 classifier =
     Development Status :: 5 - Production/Stable
@@ -27,6 +27,7 @@ console_scripts =
     linak-ctrl= linak_ctrl:main
 
 [options]
+packages = find:
 install_requires =
     pyusb