Is it possible to connect mobile phone bluetooth / USB bluetooth to Arduino so that I don't have to buy bluetooth shield?
Or if I connect IR emitter to TX and IR receiver diode to RX then is there any prgrams to communicate with Arduino using IR ?
Any other ideas to make cheap wireless connection?
I may connect receiver to Arduino, but how do I connect the transmitter to PC / laptop? Do I need another microprocessor or Arduino to make the transmitter work?
As I am a newbie, I'd like to make something simple. Is it possible to make data connection to Arduino using IR transmitter/receiver diodes? There is IR transmitter/receiver diode in my cellphone, so maybe i can send commands using my phone?
I found from Sparkfun:
And plain receiver diode
Why there is circuit board? Can't I use just the receiver diode?