That said, the purpose of this project is of course to share your heart rate. My heart rate URL for example is http://try.yaler.net/tamberg-polar (Note: you'll get a "504 Gateway Timeout" error or an empty page if my heart is not online.)
What you need:
- T31 coded Polar transmitter (http://www.polar.fi/en/products/accessories/T31_coded_transmitter )
- Polar HRMI board from SparkFun (http://www.sparkfun.com/products/8661 )
- Mini USB cable (e.g. http://www.sparkfun.com/products/598 )
- Windows computer (.NET, not sure Mono works) connected to the Internet
So let's get started...
(Note: This project has been waiting in my Instructables drafts folder since March 2011. The setup was extended using a BlueSmirf Bluetooth module to increase range during the legendary 24 hour Pachube IoT Hackathon in April 2011, but I fear I'll never manage to document that part. So, here's the basic desktop version at least.)
Step 1: Putting on the Sensor
Step 2: Connecting and Testing the Polar Board
If you are close enough to the transceiver (about 80cm max.) a greenish LED on the sensor board starts blinking. That means, your board and sensor both work.
If the LED does not blink, try moistening the sensor contact area and pressing the sensor tightly to your chest for a short moment.
For details on the transciever board and how to talk to it from Windows, see http://danjuliodesigns.com/sparkfun/hrmi_assets/hrmi.pdf