I need to connect an esp32 cam board and HW-827 pulse heart rate sensor to it for a project. Tried for this but those efforts were not successful. Please help me to achieve this.
What exactly did you try ?
How is the sensor connected to the ESP32 ?
What sketch did you use ?
have a look at pulse-sensor-esp32-tutorial
1 Like
See this topic:
All my 3 sensors don't work. I bought it on the Aliexpress website and I think I was scammed, or even the original product doesn't work well.
have you an oscilloscope to have a look at the original signal?
if you do a web search for arduino pulse rate sensor you may get some help
connected a HW-827 pulse heart rate sensor to an ESP32 NodeMCU
loaded PulseSensorPlayground library an ran File>Examples>PulseSensorPlayground>PulseSensor_ESP32
the display is fairly random varying between 65 and 85, e.g.
a oximeter gives a pulse rate between 72 and 77bpm
@horace Yes, I have an oscilloscope, and the output signal from the 3 sensors observed on the oscilloscope are very small, not allowing direct use on the Arduino's logical input.
My sensors are of this type:
looks similar to the sensor I have which I connected directly to ESP32 GPIO36 in post 6
the oscilloscope signal looks like
measuring the time between two pulses of 800mSec gives a pulse rate of 75
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.