Blitzortung RED and BLUE systems only require an internet connection.... The GUI, that is settings, etc, is accessed from a PC or other device through either WAN or LAN, but is NOT necessary at all for the system to function once optimized, you'd access for setup, changes, local observation of operation, etc...
This is not your father's Blitzortung....
There are incredible difference between what you had,... I assume a Green???
PM me.Mike