I have two general questions. I have to connect an ATMega16 with and Android phone using bluetooth. The most used bluetooth module (and cheapest) seems to be the HC-05.
1.Is it necessary to configure the bluetooth module (with the AT commands) or can I just use it with it's default settings?
2. After settings and wirings are done, how does the communication between ATMega and Android phone works?
(for example: If I send a byte through USART, does the Android phone receive it without doing anything else?)