I stopped porting hs_main to raspberry Pi.
The reason: i never really felt in love with the HS Visu, because the old HTML Visu with 1996 look sucks. Quadclient had no real Visu with floorplan. A custom Ajax Visu was a lot of work. The only solution is HSclient.exe which i had to host on a terminal server to use it from an iPad. Nothing ideal here.
Now i found a solution which i am happy with: SmartVisu
And you can host it on a raspberry pi which uses only 2W power.
now i am happy and my 2 VIA mainboards are for sale ;-)