Python tools for feedback experiments with biometric sensors.
(cc) 2014 Luis Rodil-Fernandez <[email protected]>

## Introduction

Set of python scripts to deal with real-time data coming from Nexus and HOLST biometric sensors. See libnexus and libholst respectively.

The experiment.py takes care of starting the external processes, monitoring them parsing the data coming from them and translating into a real-time stream in OSC (Open Sound Control) format. OSC is a UDP protocol that is widely used in the media arts and music technology for its low latency and simplicity.

The software only cares about parsing incoming data and repackaging it for use in realtime "stage systems", like MAX or PureData that drive actuators.

## Systems

The experimental system is composed of data gathering nodes, these nodes might be sensor boxes that can do radio transmission or IP-capable computers connected to sensorboxes. All systems communicate over a closed WiFi network for convenience. Another node (although not necessarily limited to one) receives all this data and closes the feedback loop by communicating with the actuators, in this case the stage systems or the HUE bulbs.

## Installation

Python dependencies *not* provided with this package:

psutil
twisted
txosc
pyOSC

to install them make sure you have python installed in your system and run:

$ sudo pip install <dependency name>

## Contents

denissen/     contains the toolkit provided by Ad Denissen including the
              tmsi_server and tools to process EDF data.
day*/         contains data of the experiments performed during the residence
holst/        contains the code of the HOLST message broker
libs/         contains dependencies
tests/        simple test scripts - ignore, for dev purposes only
README        this file
experiment    shell script that was used on the first day to run the experiments,
              doesn't do process control.
experiment.json this is the experiment definition file, the sensorbox
                configuration is here as well as the IPs to the machines that form the feedback system.
libholst.py   library to parse HOLST sensor data in realtime and transform it to OSC
libnexus.py   library to spawn tmsi_server processes and monitor them
tw.py         try-out code with the twisted framework

## Data format conversion

```
./tms_rd -i ~/Desktop/S5000000.SMP
```