I know how to connect one single Arduino to one HC-06 Bluetooth Module but can I connect it to two or more HC-06 Bluetooth modules? Thanks
Which Arduino board?
Essentially, you can connect one more Bluetooth than you have hardware serial ports, by way of using software serial. This presupposes that you don't need hardware serial for the monitor. A Uno can carry two, a Mega five, and some odballs in between. For all that, the more HC-0x you have on board, the more pertinent it might be to think of other forms of communication, like NRF24.