Usb-hub in OpenWrt
For this the following modules are to be added during the OpenWrt configuration:
Kernel modules:
USB Support:
<*> Kmod-usb2 
<*> Kmod-usb-core 
<*> Kmod-usb-ohci 
Network: 
Web: 
<*> Mini-httpd - A small web server (it is not needed for usb-hub but will be used later) 
After downloading by connecting of usb-hub to dmesg there should be the message:
| 
root @ OpenWrt: / # dmesg usb 1-1: new full speed USB device using ohci_hcd and address 3 hub 1-1:1.0: USB hub found hub 1-1:1.0: 4 ports detected  | 

Usb-Hub for 4 ports with external power
  

