Part Number:AFE4404
Hello,
Actually, I use the AFE4404 in one LED mode to read heartrate at wrist, so with a green LED only. I use the supplied library and all is good.
I want to read SPO2, so I will have a sensor with green/IR and red LED.
My first question is about the supplied library of the AFE4404, for SPO2 I will use 2 LED. I have the feeling that the library is designed for calibrate one LED, is it true ? (because I see the variable LED_Sel selects only one LED and all the code is a "if"..."else if" check on the variable).
how can I use the library for 2 LED calibration ? I see there is the initialize calibration anda periodic calibration, do I need to call them 2 times ?
- Initialize calibration is "OFFSET_DAC_Code_Est()" function, need to call it 2 times ?
- Periodic calibration is "CalibrateAFE4404()" function, need to call it 2 times too ?
Second question is about SPO2 LED, I need to take it at wrist, can I use the green LED ? or red LED is mandatory ? no problem with IR LED at wrist ?
Best Regards,
Sam,