Hello,
I would like to build a heart rate chest strap receiver. I have a Sigma PC 3.11 chest strap + watch-like receiver. I noticed in the documentation that chest belt emit a signal on 5.4kHz frequency. Sigma PC 3.11 docs
Does anybody know how I can receive this signal in Arduino? On Sparkfun, I saw an RMCM01 module to receive data from Polar chest straps but is not available.
klimeck:
Hello,I would like to build a heart rate chest strap receiver. I have a Sigma PC 3.11 chest strap + watch-like receiver. I noticed in the documentation that chest belt emit a signal on 5.4kHz frequency. Sigma PC 3.11 docs
Does anybody know how I can receive this signal in Arduino? On Sparkfun, I saw an RMCM01 module to receive data from Polar chest straps but is not available.
I see this in the documentation:
Transmitter
Transmission frequency: 5.4 kHz
Transmission power: < 11,37 dBm
which is in the audio range and since they give a power as 11.37 dBm, it is not a square wave. You will have to look at the signal on an oscilloscope to see what information is on the signal and if it is encoded in someway, or just a signal modulated by the heart beating.
Paul