Difference between revisions of "Bluetooth Strain Gauge"
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In terminal | In terminal | ||
(you may have to manually switch on your bluetooth connection) | (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 | ||
Latest revision as of 12:27, 22 November 2017
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
