The HLK-SW16 by Hi-Link is a simple networkable 16 port relay device.
Adding Hi-Link HLK-SW16 to your Home Assistant instance can be done via the user interface, by using this My button:
If the above My button doesn’t work, you can also perform the following steps manually:
Browse to your Home Assistant instance.
In the bottom right corner, select the Add Integration button.
From the list, select Hi-Link HLK-SW16.
Follow the instructions on screen to complete the setup.