I was looking for some way to make communicate a master arduino with 2 or multiple slave arduino by bluetooth.
The chipper solution could be HC-05? If so how can i set up the master and how i can set up the slaves?
One more thing: Can I install the master arduino within my house wall and "close" the hole using a 4D System monitor? Still it will communicate with the slaves that are at 3-6 meters far? Could closed doors stop the communications?
Thank you.
I was looking for some way to make communicate a master arduino with 2 or multiple slave arduino by bluetooth.
Theoretically this is possible but the usual Arduino modules don't support it.
The chipper solution could be HC-05?
As far as I know the HC-05 can only be a slave device. Even with the HC-06 (some of them, but only some, are able to be a Bluetooth master) you won't be able to communicate with multiple slave devices without reconfiguring them completely between the communications.
Can I install the master arduino within my house wall and "close" the hole using a 4D System monitor?
What's a "4d System monitor"? Link?
Still it will communicate with the slaves that are at 3-6 meters far?
In my experience Bluetooth communications work more or less reliably up to about 6 meters with clear line of sight. With a wall or door in between you're lucky if you get 3 meters. I guess you should take a look at alternative radio modules. Have you looked at ZigBee? Do you need two-way communication? Otherwise some 433MHz modules might be a good alternative for you. Or some RF24 modules (although I never used them yet).
does ZigBee work in the way i need?
HC-05 is a master HC-06 is slave only.
I think you could do this with a Mega, as it has four serial ports, but I don't think it is such a good idea. Bluetooth is fundamentally unsuited, and a proper solution with something like NRF24 is probably cheaper as they can work as a network i.e. you only need one at the base station. Doing it with Bluetooth means a paired HC-05 on each serial port, which Arduino can address separately.
I think two pieces of ZigBee 2 Pro should be fine. One as master and one as slave. Can you confirm me?