- What is a fast but easy way to send different pieces of information simultaneously between two arduinos. What about if it is a one-way transfer?
- What are the benefits of using bluetooth to communicate between arduinos?
I think the most robust and easy to implement method will be UART.
- Simplex or duplex communication (one-direction or two)
- easy to implement
- Maximum baud is ~115200
You can think of bluetooth as UART over the air. Bluetooth modules can serve as a transparent, wireless bridge - so the benefit they bring to the table is wireless UART.