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Why MAX30101 signal bad in wrist ?

Thread Summary

The user is unable to get a proper signal from the wrist area using a MAX30101 sensor connected to an STM32 microcontroller, despite achieving good results from the fingertip. The final answer directs the user to Analog Devices' technical support pages for further assistance, without providing a specific solution.
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Category: Hardware
Product Number: MAX30101

I have connected a MAX30101 sensor to an STM32 microcontroller.
The settings are as follows
:

  • 100 samples per second
  • 1 sample average
  • 411 sample width
  • 4096 ADC average.

I have controlled the LED current from 0 to 50 mA by increasing the current by 1mA each time. The MAX30101 is powered with a 3.3V logic level, and all LEDs are turned on simultaneously. However, I am unable to get a proper signal from the wrist area, but I can get a good signal from the fingertip.
Is there any specific position that needs to be considered
, or can anyone guide me on this issue?

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