What circuitry for heart rate monitor example and UART Bluefruit BLE?

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jdkatodc
 
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What circuitry for heart rate monitor example and UART Bluefruit BLE?

Post by jdkatodc »

Hi. I connected the Bluefruit LE UART to an Arduino Nano and loaded the heartratemonitor example. The main page of the Adafruit online tutorial says "you just need to add the pulse-detection circuitry" but then when you click to the specific page for the HeartRateMonitor tutorial, it never mentions this circuitry again. The Nano prints seemingly random heart rate numbers, ranging from 50 to 95, without me having any sensor or circuitry, so I think the BLE module, my wiring and sketch are working. Can you show me an example of this circuitry? Can I use a chest strap from a Polar monitor, if so which model? Thanks.


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