This python script can download both live data and recorded data from a Contec CMS50D+ pulse oximeter into a standard CSV file for further analysis.
In live data mode the device will sample at 60 Hz. Each sample is saved to CSV along with the current wallclock time (in UTC). For recorded data you'll have to provide a start time as the device doesn't provide any historic timestamps at all. In this mode we assume a sample rate of 1 Hz.
For more details, see my blog post at http://www.atbrask.dk/?p=244
1.0 (2015-03-24) Uploaded initial version to GitHub 1.1 (2015-03-26) Added support for downloading recorded data 1.2 (2015-09-28) Added time column to output CSV for both modes
usage: cms50dplus.py [-h] [-s STARTTIME] {LIVE,RECORDED} serialport output
cms50dplus.py v1.2 - Contec CMS50D+ Data Downloader (c) 2015 atbrask
positional arguments: {LIVE,RECORDED} Specify LIVE for live data or RECORDED for recorded data. serialport The device's virtual serial port. output Output CSV file.
optional arguments: -h, --help show this help message and exit -s STARTTIME, --starttime STARTTIME The start time for RECORDED mode data.
If you have the device connected as /dev/ttyUSB0 and want live data saved as foo.csv, then the program can be run like this:
./cms50dplus.py LIVE /dev/ttyUSB0 foo.csv
Likewise for recorded data:
./cms50dplus.py RECORDED /dev/ttyUSB0 foo.csv -s "2015-01-01 12:34:56"