Data reader for CMS50E Pulse Oximeter

This module reads and outputs data from a Contec CMS50E pulse oximeter.

It has only been tested on Mac OS X Yosemite with Python 3.4. Consider this a work in progress.

If you try to upload recorded data from the device, the program will simply discard the data, but continue working.

Planned features:

• Saving of recorded data
• Live recording and saving
• Web based interface to view pulse waveform data

Usage

First, this driver must be installed.

Then:

python setup.py develop to install dependencies

python cms50e.py /path/to/usb-device to run the program

On the computer used for testing, the usb device was found at /dev/cu.SLAB_USBtoUART. The name of the USB device may be different. Running ls /dev/cu.* should provide some hints.

Make sure the device has the USB setting on, and is connected to the computer. If the program is not outputting any data, simply running cat /path/to/usb-device can kickstart it.

Example output

The output is updated 20 times per second.

Heartrate:		 62
Oxygen saturation:	 98
Pulse waveform:		 24

Hit Ctrl+C to exit.

Acknowledgements

Written by Christoffer Torris Olsen

Thanks to Alex Robinson for interface documentation.