Comments: SparkFun Pulse Oximeter and Heart Rate Monitor Hookup Guide

Hi the code in examples on the learn.sparkfun.com page: Example 1:Config BPM Mode 1 SparkFun_Bio_Sensor_Hub bioHub(DEF_ADDR, resPin, mfioPin);

Doesn't match the call in github library to the driver SparkFun_Bio_Sensor_Hub::SparkFun_Bio_Sensor_Hub(uint16_t resetPin, uint16_t mfioPin, uint8_t address) {

Couldn't get anything to work until I changed example to SparkFun_Bio_Sensor_Hub bioHub(resPin, mfioPin);

The examples in github are correct

ken

I noticed that the data sheet for the MAX32664 has absolute maximum ratings for SCL SDA RESET and MFIO of VDD+0.3V. On this board the MAX32664 is powered from 1.8V but the Host I2C lines are pulled up to 3.3V, Why is this ok? Presumably, RESET and MFIO are also seeing 3.3V levels as well.

Unable to communication with the MAX32664 using SparcFun Pulse Oximiter Board with Red Board. Running Arduino 2.3.2 with master branch of SparkFun_Bio_Sensor_Hub_Library (https://github.com/sparkfun/SparkFun_Bio_Sensor_Hub_Library). In the src folder of the library, I see the I2C address is set in MAX30105.h and is incorrect: 0x57 rather than 0x55. Yet, even with that corrected, the MAX32664 is unresponsive because the command sequence is not correct. On startup of the example program, I decode on I2C: 0xAA, 0xFF (and no index byte) followed by a read request. That command sequence cannot work because the index byte is missing.

What am I missing here? Is the repo in disrepair? Do I need to use a branch of the repo other than master?

Hi, I am trying to run this library on stm32duino for the blue pill, but it has problems, can you help me?

Hi, I am trying to use MAX32664 to interface with MAX30102 instead. However, using the provided Sparkfun _Bio_Sensor_Hub, I am unable to retrieve any data from it. However, I am able to interface with MAX32664. Even though the library is catered for MAX30101 sensor. I would like some assistance in interfacing MAX30102 with MAX32664 while using the same library. Your help is much appreciated.

Hi Sparkfun Team,

I noticed that the documentation introduces contradictory information regarding the relationship between the possible value of sample and pulse width. Comments in the example code and BioHub library suggest there is a configuration that will allow 3200 samples per second (sps). However, the highest sample value I could achieve was 1600 with a pulse width of 69. Can you clarify if it is possible to achieve 3200 sps on this system?

Hi, Thank you for this very helpful library and clear examples! However, as a beginner in arduino i still have trouble to understand exactly the code behind, that is how you obtain the oxygen level for example. Did you realize a calibration step? And do you have a file explaining a bit the theory behind the code? Thank you in advance :)

Hello,

I am trying to get example 1 to work with a Arduino Nano 33 BLE sense with Nordic nRF52840 architecture. I have used a solder and checked and rechecked all my joints. When I run the example, it compiles, and gives no errors at any point, but outputs 0 for every metric. Is this architecture not supported, if so, would I need to port the library to fit the nRF52840 architecture in order to make this hardware work?

Thank you in advance for your help.

Hi! I need pure PPG signal, but there is no way I can get it. Can you help me?

Can this work on raspberry pi 4? and if yes can I make it work using python?

Hello, I am trying to use this sensor on Arduino Nano Every. But i am getting this error

Could not communicate with the sensor!!! Configuring Sensor.... Error configuring sensor. Error: 1

The reset pin and Mfio pin are connected to pin 4 and 5 respectively. I am using the latest version of the library. Could you atleast hint what could be the problem?