Bluetooth Strain Gauge

Notes for setting up the Bluetooth strain gauge (RN42-0452) with e.g. MATLAB:

In terminal (you may have to manually switch on your bluetooth connection)

• Scan for devices:

 hcitool scan

Look for the MAC-ADDRESS and copy it into the following <MAC> This will bind the device to the name /dev/rfcomm1:

(sudo) rfcomm bind /dev/rfcomm1 <MAC>

Afterwards, check if it has been bound:

rfcomm -a

It now appears as a serial connection, and you can use the 'cat' command to view the output:

cat /dev/rfcomm1

To pipe the data into a file (directory is where you are standing):

cat /dev/rfcomm1 > datafile.dat

You can also use fopen() and fscanf() to read in data into MATLAB: example:

instrreset;
s = serial('/dev/rfcomm1', 'BaudRate', 115200);
fopen(s);
data = fscanf(s); %read data into array
disp(data);
fclose(s);

To remove the binding:

rfcomm release /dev/rfcomm1