We too are looking to develop a PMS interface for a MikroTik. The issue with Rad is it requires a FIAS (IP/XML) interface on the PMS system. the majority of limited service properties have a serial interface... I know how it needs to work, but dont have the coding skills to make it happen. We are willing to pay the 15,000.00 to Micros, and willing to either sell the interface for cheep or give it away for free, we haven't decided yet.. this will depend on weather or not we get free development help from this forum..
Something to think about:
cloud portal page > user sends last name room number > sent back to MikroTik to linux build on SD card (PMS Application) > out IP to Precidia iPocket232 > PMS system.
There are many ways to skin this cat, but if we want to get this interface certified by Micros we will need to follow their rules, which is why Rad didn't make the cut for certification.
Yours in wireless,