Bluetooth

I have ordered 5 HC-05 Bluetooth serial module, got it paired with windows
pc, can't figure out how to run 1-master and 4-slave together. 
Is it even possible to have active connection to 1 master from 4 slave ?
Thx

Hi, I know that usb bluetooth devices can cope with multiple devices across
different profiles, however, I don't think these are built for that, I
think they're single connection devices, although I could be wrong.  there
was an article on hackaday where a guy had managed to hack these hc- units
with profiles from a 3rd party vendor, you might get better mileage that
way.

Thanks for the info. 
Would anyone know that Zigbee or a simple 433mhz radio link can talk to
multiple device incase I can't make my Bluetooth running.