Hi Harshini,
You can connect eSSL devices to Lenvica HRMS right away.
1. Go to Time Registration -> Devices.
2. Add a new device.
3. Choose device type 'Direct' (Direct Communication with the attendance device)
4. Select device 'ZK'.
5. Enter the IP address of the device.
That's it. Lenvica HRMS will take care of the rest.
Hope this helps.
Biju.