Connecting to Stollmann's BlueRS+

The Stollmann BlueRS+ is one of many Bluetooth Serial Port Adapters and it is also the first one that I have been able to get to work. No configuration software comes with the device, instead all commands and configurating can be done through a terminal program (i.e. hyperterminal). Thereis a manual as well as a quick install guide for this device, which are very useful for configuring the device. However, the manual does leave some key information out and lacks definitions for many of the terms and settings, which an unexperienced user may not know about. I've placed some of my configuration steps and useful commands below for those who encounter problems with setting up the device.

Configuring the Device

The device must be attached to a 5V power supply and connected to a TTL-DB-9 converter chip, which outputs to a serial connector (schematic of our setup). To communicate with your BlueRS+ you will need to connect the serial connector to your PC and run a terminal emulator such as hyperterminal, which can be found under your Start>Programs>Accesories>Communications.

To begin sending commands to the BlueRS+ set your terminal emulator to COM 1 set at the speed of the BlueRS+ (default 115200) 8-N-1. From here you can use all of the AT Commands in the manual, all commands begin with AT and capitalization is not important. There are two commands which you may want to run immediately:

1. "ATS0=1", this command sets the device to accept calls automatically.

2. "AT&D0", sets the device to ignore the DTR.

The manual provides the steps for entering the configurator on page 21, however this involves resetting the PC's COM Port and restarting the device. A less confusing way is to enter with the command "ATCONF". If the command works, a # sign will appear on the screen acting as the prompt. Here you can enter all the configuration commands listed in the manual starting on page 22. To get a listing of the categories that these commands fall into simply type ?, to get a listing of the commands in these categories type ?<category name>. Similarly, to find out what options there are for a certain setting type ?<setting name> and to find out what a certain setting is set to type the setting's name. For Example (BR is the baud rate setting):

# ?br

1-1200

2-2400

:

9-230400

# br

8-115200

# br=4

#br

4-9600

The "BR" setting is particularly important as it should match the speed of the device that the BlueRS+ is going to be connected to.

Make sure to save any changes you have made by typing "save" and type "exit" to return to the AT mode.

The inital Bluetooth Passkey is '0000', if you wish to change it you can use AT**bpin=0000,xxxx or without the AT if you're inside of the configurator.

Essentially, these are the only changes that will be needed to get your BlueRS+ to work with your other Bluetooth devices. There are many more commands and settings you can play with if you choose and you can always revert back to factory settings (including passkey) with the AT&F1.

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