Collection of programs (written mostly in Python2) I've made for collecting live heart beat signal and processing it, suitable for prototyping heart rate variability training applications.
Biofeedback is the process of gaining greater awareness of physiological functions primarily using instruments that provide information on the activity of those same systems, with a goal of being able to manipulate them at will.
The hardware setup consists of:
- Arduino Duemilanove microcontroller connected to Linux server with USB cord
- Pulse Sensor Amped running off 5V and connected to Analog In 0 pin
- Pulse Sensor clipped to ear lobe
The Arduino is loaded with modified Pulse Sensor firmware.
The core of the server side data uplink is done with heart.py module depending on:
- pySerial
- NumPy
After installing the module:
import heart
monitor = heart.Heartbeat_Monitor("/dev/ttyUSB0")
monitor.start()
Or
$ python2 -m heart
To read your serial stream:
$ stty -F /dev/ttyUSB0 cs7 cstopb -ixon raw speed 115200
$ cat /dev/ttyUSB0Permission denied opening serial connection device /dev/ttyUSB0:
# usermod -a -G uucp yourregusername
$ logout and login for group permissions to update