Sparkfun 30101 sensor with nodemcu ESP8266 status 16?

[pbnair]

Hello We are using SparkFun Pulse Oximeter and Heart Rate Sensor - MAX30101 & MAX32664 (Qwiic) with nodemcu esp8266 and getting the error Status: 16. Attached pictures shows the diagram and the error code.
Please let me know if this digarm is correct . When we use Arduino instead of nodemcu the sensor is working fine and we can read the heart rate and oxygen.

[ruilviana]

Hi

To facilitate help, post your code.
But when posting the code, don't forget to put it between tags </>.

RV mineirin

[pbnair]

#include <SparkFun_Bio_Sensor_Hub_Library.h>
#include <Wire.h>

// Reset pin, MFIO pin
int resPin = 4;
int mfioPin = 5;

// Takes address, reset pin, and MFIO pin.
SparkFun_Bio_Sensor_Hub bioHub(resPin, mfioPin); 

bioData body;  
// ^^^^^^^^^
// What's this!? This is a type (like int, byte, long) unique to the SparkFun
// Pulse Oximeter and Heart Rate Monitor. Unlike those other types it holds
// specific information on your heartrate and blood oxygen levels. BioData is
// actually a specific kind of type, known as a "struct". 
// You can choose another variable name other than "body", like "blood", or
// "readings", but I chose "body". Using this "body" varible in the 
// following way gives us access to the following data: 
// body.heartrate  - Heartrate
// body.confidence - Confidence in the heartrate value
// body.oxygen     - Blood oxygen level
// body.status     - Has a finger been sensed?


void setup(){

  Serial.begin(115200);

  Wire.begin();
  int result = bioHub.begin();
  if (result == 0) // Zero errors!
    Serial.println("Sensor started!");
  else
    Serial.println("Could not communicate with the sensor!!!");
 
  Serial.println("Configuring Sensor...."); 
  int error = bioHub.configBpm(MODE_ONE); // Configuring just the BPM settings. 
  if(error == 0){ // Zero errors!
    Serial.println("Sensor configured.");
  }
  else {
    Serial.println("Error configuring sensor.");
    Serial.print("Error: "); 
    Serial.println(error); 
  }

  // Data lags a bit behind the sensor, if you're finger is on the sensor when
  // it's being configured this delay will give some time for the data to catch
  // up. 
  Serial.println("Loading up the buffer with data....");
  delay(4000); 
  
}

void loop(){

    // Information from the readBpm function will be saved to our "body"
    // variable.  
    body = bioHub.readBpm();
    Serial.print("Heartrate: ");
    Serial.println(body.heartRate); 
    Serial.print("Confidence: ");
    Serial.println(body.confidence); 
    Serial.print("Oxygen: ");
    Serial.println(body.oxygen); 
    Serial.print("Status: ");
    Serial.println(body.status); 
    // Slow it down or your heart rate will go up trying to keep up
    // with the flow of numbers
    delay(250); 
}

[pbnair]

Just posted the code. Thanks

[ruilviana]

Hi

When does this code 16 error appear?
During compilation/upload of code or during execution.
As I don't have this module, (SparkFun Pulse Oximeter and Heart Rate Sensor), I could only compile its code and no error occurred.

BTW where is this?

@pbnair

Attached pictures shows the diagram and the -->> error code. <<<--------

RV mineirin

[pbnair]

The code burns to the nodemcu correctly. When we open the serial com windows we see this message.See the attached image. Thanks.

[ruilviana]

Hi
Examining the SparkFun_Bio_Sensor_Hub_Library.cpp file from the SparkFun_Bio_Sensor_Hub_Library.h library I found the following lines below.

  
    198       bioData SparkFun_Bio_Sensor_Hub::readBpm(){ <---- readBpm

    231       //"Machine State" - has a finger been detected?
    232       libBpm.status = bpmArr[5]; <<--- status

So it appears that status 16 appears to be a sensor fault detection.

RV mineirin

[pbnair]

Thanks, Could you please clarify whether a sensor fault detection means faulty sensor ?
The same sensor works fine when used with Arduino.

[leandro_jesus_eng]

I have the same problem. Did you manage to solve it?

[horace]

have a look at Example1_config_BPM_Mode1.ino
where the connections are specified as

SDA -> SDA
 SCL -> SCL
 RESET -> PIN 4
 MFIO -> PIN 5

however, looking at NodeMCU 8266 pinout etc GPIO5 is SCL and GPIO4 SDA so you have to use other pins for RESET and MFIO

Edit: looking at some code for a BMP280 I implemented some time ago there is a comment

 // ESP32 SDA to D21 SCL to D22
 // ESP8266 SDA to D2 (GPIO4) SCL to D1 (GPIO5)

[leandro_jesus_eng]

Many thanks for the reply. It worked here!

[horace]

what pins did you use for for RESET and MFIO?