SparkFun Forums

[milazz]

I have some questions about the Bluetooth devices
I have a senior project for my final year at university and I need to
control a machine via a Bluetooth enabled cellular phone (via a Java application)
I would like to ask which devices can achieve a long time connection with a cellular phone so I can control the machine
(The machine takes easy and small controls, like on, off, step up, step down...)
So the received data is very small (a byte or 2 per action)
I saw the Bluetooth v2.0 DIP Module and the “easyâ€

[DarioG]

In my opinion, Bluetooth is kind of complicated, even for simplest tasks. Its Stack can do almost everything, that's why.

I'd suggest you get a Bluetooth dongle for PC, or rather a Bluetooth to Serial (like Merlin 's or Sena ) , and to some tests making the Mobile phone talking to PC. Then, go on with DIP module and PIC.

[stevech]

there are some bluetooth to RS232 serial devices that can talk to one another. But really, a module like Maxstream XBee is far easier and not tangled up with driver issues.

[wiml]

You ought to be able to connect to the bluesmirf over RFCOMM from a MIDP device (like a cell phone) by calling javax.microedition.io.Connector.open("btspp://XXXXXXXXXXXX:0"); where the XXXXXXXXXXXX is the hexadecimal bluetooth address of the bluesmirf. (btspp: is the Bluetooth Serial Port Profile recognized by the J2ME generic connection framework). Read up on MIDP, CLDC, and maybe JSR-082 if you want to do something fancier than a serial connection.

I just tried to do this, but I'm having a hard time getting a development environment set up that produces applets my phone will accept. Oh well.