SparkFun_MAX3010x_Sensor_Library
SparkFun_MAX3010x_Sensor_Library copied to clipboard
sparkfun
HR betweem 150 to 250
Did you follow the hookup guide? I'm hoping you used a rubber band or other positive pressure device to hold the sensor against your finger?
Thanks for your prompt reply. I did everything as the guide explains, the spo2 looks great, however the hr is always high. 150 and above, that doesn't seem to be right. I am quite relaxed and alive.....
Let's check the basics.
What platform are you connected to? What voltage are you running at? Do you have a link to the board you purchased?
On Thu, Aug 9, 2018, 9:30 PM talal44 [email protected] wrote:
Thanks for your prompt reply. I did everything as the guide explains, the spo2 looks great, however the hr is always high. 150 and above, that doesn't seem to be right. I am quite relaxed and alive.....
— You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/sparkfun/SparkFun_MAX3010x_Sensor_Library/issues/17#issuecomment-411964930, or mute the thread https://github.com/notifications/unsubscribe-auth/AAHJbuLs2Isb4S5VlnOV6n5fl-1urX3Bks5uPP43gaJpZM4V3goW .
I have two boards, arduino uno and elegoo mega2560 r3. It doesn't make any difference whether I connect my sparkfun max30105 to 5v or 3.3v. I got almost same reading both ways.
And just to be clear, are you using the SparkFun board?
Looks like you're running example 8. Do you see different output when you run example 5_HeartRate? The IC is configured differently in Example 5.
I am using the red Sparkfun max30105 board. I get better better sensible and logical hr numbers with example 5.
Ah, ok. Sounds like the hardware is functioning. Both examples depend on Maxim's algorithms. We can support the library but you'll need to talk to Maxim for support on the algorithms.
A quick search turned up some other options. This example might get you started down a better Sp02 detection.
Thanks a lot for your guidance. However, I still didn't got it, am I the only one who has this problem with the HR numbers in example_8? even when I use my new Sparkfun esp8266 thing board I get the same results. When I opened this issue I was hoping that there is someone who had the same issue and found a solution somehow.
I have run across the exact same problem. I'm running a MAX30102 on a DIYmall breakout board. http://a.co/d/d31zetS On an ESP8266 (AI-Thinker) - (Adafruit Feather Huzzah equivalent).
All of the examples work as expected except the SPO2 example 8. I get readings like this: red=105481, ir=121830 red=105500, ir=121889 red=105502, ir=121942 red=105521, ir=122030, HR=166, HRvalid=1, SPO2=100, SPO2Valid=1 red=105529, ir=122088, HR=166, HRvalid=1, SPO2=100, SPO2Valid=1 red=105498, ir=121597, HR=166, HRvalid=1, SPO2=100, SPO2Valid=1 red=105229, ir=121368, HR=166, HRvalid=1, SPO2=100, SPO2Valid=1
The calculated values do fluctuate but they seem like complete garbage.
My heart rate during the above measurement was between 50 and 60 bpm with a tight finger strap (velcro) and clean red/ir signals (seen if I switch to plotting them like this): Serial.print(redBuffer[i], DEC); Serial.print(F(",")); Serial.println(irBuffer[i] - 17000, DEC);
The - 17000 on the ir was to move it closer to the red so the plotter is zoomed in better. (I hate you Arduino serial plotter, but you're convenient.)
I was hoping for a quick on chip solution to this so I could move on but looks like I'll have to dig in a bit more. I haven't dug into the yet but I'll share my results when I do.
I'm curious, has ANYONE seen this example work properly?
UPDATE: Tired again on an Adafruit Feather M0, same results.
Having the same issue, same board as ThingEngineer. Anyone find another board/code example that works for SpO2?
Same issue. It is not about the board, it is about the code, or specifically the algorithm. The code from Maxim can work sometimes, but it doesn't work well at the most time ,especially under the external light interference. I had checked the waveform of raw data and found it worse when I turned on the table lamp next to me. So you can use some black item to cover the sensor board and try it again. But I still think the code from Maxim is too sensitive to the interference and we need to improved it.
Hi, couple of years later still finding the same issue with HR with using code from example 8, based on spo2_algorithm.h library. But, I get reasonable good data with example 5, based on "heartRate.h" lib. So, has anyone solved this questions. Is it possible to combine HR calculated from example 5 and spo2 from example 8? BTW both seems to work fin in MAX30100. I hope there is still someone interested in this.
thanks
I am also having the same issue. Heart Rate is just all over the place the Oxygen reading seems good. When i combine 5 and 8 the heart rate is still all over the place. Soluna1 I will keep report back with any additional information.
I am also struggling with this issue! Example 5 works like a charm for HR. Example 8 shows SPO correctly, but HR is completely messed up. I've been trying to combine them, but apparently the issue is when you call setup() with different values. Setup() conf for example 5 doesn't work with spo and setup parameters from example 8 doesn't get correct HR.
I have a new algorithm that seems to work fairly well. I will reply to this email in a little bit.
On Mon, Jun 15, 2020 at 3:51 AM lfssp [email protected] wrote:
I am also struggling with this issue! Example 5 works like a charm for HR. Example 8 shows SPO correctly, but HR is completely messed up. I've been trying to combine them, but apparently the issue is when you call setup() with different values. Setup() conf for example 5 doesn't work with spo and setup parameters from example 8 doesn't get correct HR.
— You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/sparkfun/SparkFun_MAX3010x_Sensor_Library/issues/17#issuecomment-643964972, or unsubscribe https://github.com/notifications/unsubscribe-auth/AA65HNPQOO5XIE5Q4SXPTLDRWXHJTANCNFSM4FO6BILA .
I did not strip anything out so please use what you like. The program send the SPO2 and HBM via bluetooth. The device that I am using is an Arduino feather.
/************************************ *
- This includes are bluetooth
***********************************/ #include <Arduino.h> #include <SPI.h> #include "Adafruit_BluefruitLE_SPI.h" #include "Adafruit_BluefruitLE_UART.h"
#include "BluefruitConfig.h"
// BlueTooth #if SOFTWARE_SERIAL_AVAILABLE #include <SoftwareSerial.h> #endif
Adafruit_BluefruitLE_SPI ble(BLUEFRUIT_SPI_CS, BLUEFRUIT_SPI_IRQ, BLUEFRUIT_SPI_RST);
#include <Wire.h> #include "MAX30105.h" //sparkfun MAX3010X library MAX30105 particleSensor;
//#define MAX30105 //if you have Sparkfun's MAX30105 breakout board , try #define MAX30105
/* BlueTooth service information */
int32_t ServiceId; int32_t hrmMeasureCharId; int32_t hrmLocationCharId; int32_t spoMeasureCharId;
/****************** heart rate *********************/ static double fbpmrate = 0.95; // low pass filter coefficient for HRM in bpm static uint32_t crosstime = 0; //falling edge , zero crossing time in msec static uint32_t crosstime_prev = 0;//previous falling edge , zero crossing time in msec static double bpm = 40.0; static double ebpm = 40.0; static double eir = 0.0; //estimated lowpass filtered IR signal to find falling edge without notch static double firrate = 0.85; //IR filter coefficient to remove notch , should be smaller than frate static double eir_prev = 0.0;
#define TIMETOBOOT 3000 // wait for this time(msec) to output SpO2 #define SCALE 88.0 //adjust to display heart beat and SpO2 in the same scale #define SAMPLING 5 //if you want to see heart beat more precisely , set SAMPLING to 1 #define FINGER_ON 30000 // if red signal is lower than this , it indicates your finger is not on the sensor #define MINIMUM_SPO2 80.0
#define FINGER_ON 50000 // if ir signal is lower than this , it indicates your finger is not on the sensor #define LED_PERIOD 100 // light up LED for this period in msec when zero crossing is found for filtered IR signal #define MAX_BPS 180 #define MIN_BPS 45
// A small helper void error(const __FlashStringHelper*err) { Serial.println(err); while (1); }
#define USEFIFO void setup() {
boolean success; Serial.begin(115200); Serial.println("Initializing...");
Serial.println(F("Adafruit Bluefruit Heart Rate Monitor (HRM) Example")); Serial.println(F("---------------------------------------------------"));
/* Initialise the module */ Serial.print(F("Initialising the Bluefruit LE module: "));
if ( !ble.begin(VERBOSE_MODE) ) { error(F("Couldn't find Bluefruit, make sure it's in CoMmanD mode & check wiring?")); } Serial.println( F("OK!") );
/* Perform a factory reset to make sure everything is in a known state */ Serial.println(F("Performing a factory reset: ")); if (! ble.factoryReset() ){ error(F("Couldn't factory reset")); }
/* Disable command echo from Bluefruit */ ble.echo(false); ble.info();
// this line is particularly required for Flora, but is a good idea // anyways for the super long lines ahead! // ble.setInterCharWriteDelay(5); // 5 ms
/* Change the device name to make it easier to find */ Serial.println(F("Setting device name to 'Bluefruit HRM': "));
if (! ble.sendCommandCheckOK(F("AT+GAPDEVNAME=HMHS Health Monitor")) ) { error(F("Could not set device name?")); }
/* Add the Heart Rate Service definition / / Service ID should be 1 */ Serial.println(F("Adding the Heart Rate Service definition (UUID = 0x180D): ")); success = ble.sendCommandWithIntReply( F("AT+GATTADDSERVICE=UUID=0x180D"), &ServiceId); if (! success) { error(F("Could not add HRM service")); }
/* Add the Heart Rate Measurement characteristic / / Chars ID for Measurement should be 1 */ Serial.println(F("Adding the Heart Rate Measurement characteristic (UUID = 0x2A37): ")); success = ble.sendCommandWithIntReply( F("AT+GATTADDCHAR=UUID=0x2A37, PROPERTIES=0x10, MIN_LEN=2, MAX_LEN=2, VALUE=00-40"), &hrmMeasureCharId); if (! success) { error(F("Could not add HRM characteristic")); }
/* Add the Body Sensor Location characteristic / / Chars ID for Body should be 2 */ // Serial.println(F("Adding SPO2 Sensor characteristic (UUID = 0x2A29): ")); // success = ble.sendCommandWithIntReply( F("AT+GATTADDCHAR=UUID=0x2901, PROPERTIES=0x10, MIN_LEN=2, MIN_LEN=2, VALUE=00-41"), &spoMeasureCharId); // if (! success) { // error(F("Could not add BSL characteristic")); // }
/* Add the Heart Rate Service to the advertising data (needed for Nordic apps to detect the service) */ Serial.print(F("Adding Heart Rate Service UUID to the advertising payload: ")); ble.sendCommandCheckOK( F("AT+GAPSETADVDATA=02-01-06-05-02-0d-18-0a-18") );
/* Reset the device for the new service setting changes to take effect */ Serial.print(F("Performing a SW reset (service changes require a reset): ")); ble.reset();
Serial.println();
// Initialize sensor if (!particleSensor.begin(Wire, I2C_SPEED_FAST)) //Use default I2C port, 400kHz speed { Serial.println("MAX30102 was not found. Please check wiring/power/solder jumper at MH-ET LIVE MAX30102 board. "); while (1); }
//Setup MAX30102 byte ledBrightness =70; //Options: 0=Off to 255=50mA byte sampleAverage = 2; //Options: 1, 2, 4, 8, 16, 32 byte ledMode = 2; //Options: 1 = Red only, 2 = Red + IR, 3 = Red + IR + Green //Options: 1 = IR only, 2 = Red + IR on MH-ET LIVE MAX30102 board int sampleRate = 400; //Options: 50, 100, 200, 400, 800, 1000, 1600, 3200 int pulseWidth = 411; //Options: 69, 118, 215, 411 int adcRange = 4096; //Options: 2048, 4096, 8192, 16384 // Set up the wanted parameters particleSensor.setup(ledBrightness, sampleAverage, ledMode, sampleRate, pulseWidth, adcRange); //Configure sensor with these settings
}
double avered = 0; double aveir = 0; double sumirrms = 0; double sumredrms = 0; int i = 0; int Num = 100;//calculate SpO2 by this sampling interval
double ESpO2 = 95.0;//initial value of estimated SpO2 double FSpO2 = 0.7; //filter factor for estimated SpO2 double frate = 0.95; // .95 default low pass filter for IR/red LED value to eliminate AC component
void loop() {
uint32_t ir, red , green; double fred, fir; double SpO2 = 0; //raw SpO2 before low pass filtered int idx=0;
#ifdef USEFIFO
particleSensor.check(); //Check the sensor, read up to 3 samples
int Ebpm = 60;
while (1) {//do we have new data
#ifdef MAX30105 red = particleSensor.getRed(); //Sparkfun's MAX30105 ir = particleSensor.getIR(); //Sparkfun's MAX30105 #else red = particleSensor.getRed(); //why getFOFOIR outputs Red data by MAX30102 on MH-ET LIVE breakout board ir = particleSensor.getIR(); //why getFIFORed outputs IR data by MAX30102 on MH-ET LIVE breakout board #endif i++; fred = (double)red; fir = (double)ir; avered = avered * frate + (double)red * (1.0 - frate);//average red level by low pass filter aveir = aveir * frate + (double)ir * (1.0 - frate); //average IR level by low pass filter sumredrms += (fred - avered) * (fred - avered); //square sum of alternate component of red level sumirrms += (fir - aveir) * (fir - aveir);//square sum of alternate component of IR level
Ebpm = (int) HRM_estimator(fir, aveir); //Ebpm is estimated BPM
if (ir < FINGER_ON)
ESpO2 = MINIMUM_SPO2; //indicator for finger detached
if ((i % Num) == 0) {
double R = (sqrt(sumredrms) / avered) / (sqrt(sumirrms) / aveir);
SpO2 = -23.3 * (R - 0.4) + 100;
ESpO2 = FSpO2 * ESpO2 + (1.0 - FSpO2) * SpO2;
Serial.print(SpO2);Serial.print(",");Serial.print(ESpO2);
Serial.print(" BPM : "); Serial.print(Ebpm);Serial.print(", R :");Serial.println(R); sumredrms = 0.0; sumirrms = 0.0; i = 0;
Serial.print("Heart Rate: ");
Serial.println(Ebpm);
sendHRData(Ebpm, ESpO2);
//sendSPOData(ESpO2);
break;
}
particleSensor.nextSample(); //We're finished with this sample so move
to next sample
// Serial.println(SpO2); } #endif }
void sendHRData(int heartRate, int spo2) {
Serial.print("HR : "); Serial.print(heartRate); Serial.print(" SPo2 :"); Serial.println(spo2);
ble.print( F("AT+GATTCHAR=") );
ble.print( hrmMeasureCharId );
ble.print( F(",") );
ble.print(spo2, HEX);
ble.print("-");
ble.println(heartRate, HEX);
if ( !ble.waitForOK() ) {
Serial.println(F("Failed to get response HeartRate ....."));
}
} // end sendData
double HRM_estimator( double fir , double aveir) {
int CTdiff;
// Heart Rate Monitor by finding falling edge eir = eir * firrate + fir * (1.0 - firrate); //estimated IR : low pass filtered IR signal
if ( ((eir - aveir) * (eir_prev - aveir) < 0 ) && ((eir - aveir) < 0.0)) { //find zero cross at falling edge crosstime = millis();//system time in msec of falling edge //Serial.print(crosstime); Serial.print(",CRT,"); Serial.println(crosstime_prev);
//Serial.print("Cross Time :");
CTdiff = crosstime-crosstime_prev;
//Serial.println(CTdiff);
//if ( ((crosstime - crosstime_prev ) > (60 * 1000 / MAX_BPS)) &&
((crosstime - crosstime_prev ) < (60 * 1000 / MIN_BPS)) ) {
if ( ( CTdiff > 333 ) && ( CTdiff < 1333 ) ) {
bpm = 60.0 * 1000.0 / (double)(crosstime - crosstime_prev) ; //get bpm
// Serial.println("crossed");
ebpm = ebpm * fbpmrate + (1.0 - fbpmrate) * bpm;//estimated bpm by
low pass filtered #ifdef LED_SOUND_INDICATOR if (aveir > FINGER_ON) { digitalWrite(LEDPORT, HIGH); tone(BLIPSOUND-(100.0-ESpO2)*10.0);//when SpO2=80% BLIPSOUND drops 200Hz to indicate anormaly } #endif } else { //Serial.println("faild to find falling edge"); } crosstime_prev = crosstime; } eir_prev = eir; return (ebpm); }
On Mon, Jun 15, 2020 at 3:32 PM lfssp [email protected] wrote:
That's a good news @caferrick https://github.com/caferrick . Waiting to see your progress.
— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/sparkfun/SparkFun_MAX3010x_Sensor_Library/issues/17#issuecomment-644334118, or unsubscribe https://github.com/notifications/unsubscribe-auth/AA65HNKBGG27YFY7APVZD5LRWZZMNANCNFSM4FO6BILA .
Hi @caferrick , thank you for the updated code!! I'll let you know asap how it works. Sure it's great!
@caferrick Nice job up there! (using MAX30102 + ESP8266) I Eliminated the Bluetooth relevant code, I can see drastic improvement in HR but SpO2 is pretty unstable in for me here (spanning 60-110 randomly)
(using MAX30102 + ESP8266) Example_08 for HR+SpO2 is giving my random values, not even being close to accurate, with SpO2 being -999, invalid for the most part
I noticed with the sensor that I am using my finger has to be fairly stable on the device. Also the 20 seconds or the numbers are all over the place
On Tue, Jun 16, 2020 at 6:04 AM Adeel ahmad [email protected] wrote:
@caferrick https://github.com/caferrick Nice job up there! (using MAX30102 + ESP8266) I Eliminated the Bluetooth relevant code, I can see drastic improvement in HR but SpO2 is pretty unstable in for me here (spanning 60-110 randomly)
— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/sparkfun/SparkFun_MAX3010x_Sensor_Library/issues/17#issuecomment-644667399, or unsubscribe https://github.com/notifications/unsubscribe-auth/AA65HNJFEMMXRCDJN3D4M4DRW47UHANCNFSM4FO6BILA .
@caferrick can you share any supporting research/study based on which, you have come up with your algortihm? I'd like to tweak FSpO2 or something there to make SpO2 consistent, a top threshold of 100 is also required.
I found the original Algorithm on the Web and modified it slightly based on the MAX3012 data sheet. I will try to tweak the code a little more and if you have any luck please let me know.
On Tue, Jun 16, 2020 at 7:34 AM Adeel ahmad [email protected] wrote:
@caferrick https://github.com/caferrick can you share any supporting research/study based on which, you have come up with your algortihm? I'd like to tweak FSpO2 or something there to make SpO2 consistent, a top threshold of 100 is also required.
— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/sparkfun/SparkFun_MAX3010x_Sensor_Library/issues/17#issuecomment-644707421, or unsubscribe https://github.com/notifications/unsubscribe-auth/AA65HNNMQNKZI6SZ6G5C7JTRW5KENANCNFSM4FO6BILA .
@caferrick Can you share the literature/link? That'd help me to better understand various other aspects/factors and i may be able to effectively tweak the code.
here is just on site
https://pdfserv.maximintegrated.com/en/an/AN6409.pdf You can search for spec sheets for MAX30102
On Tue, Jun 16, 2020 at 8:00 AM Adeel ahmad [email protected] wrote:
@caferrick https://github.com/caferrick Can you share the literature/link? That'd help me to better understand various other aspects/factors and i may be able to effectively tweak the code.
— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/sparkfun/SparkFun_MAX3010x_Sensor_Library/issues/17#issuecomment-644718765, or unsubscribe https://github.com/notifications/unsubscribe-auth/AA65HNOE53SYAXQQSIITZ5DRW5NHNANCNFSM4FO6BILA .
I see, i have the specs sheet, was trying various MAX30101 algorithms to run on MAX30102 by updating registers mapping, didn't get any success yet.
@caferrick which sensor are you using? is it Maxim's 30102 or some other vendor?
30102 5 connector pins on one side the other just had the LED and two mounting holes
On Tue, Jun 16, 2020 at 11:52 AM Adeel ahmad [email protected] wrote:
@caferrick https://github.com/caferrick which sensor are you using? is it Maxim's 30102 or some other vendor?
— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/sparkfun/SparkFun_MAX3010x_Sensor_Library/issues/17#issuecomment-644851451, or unsubscribe https://github.com/notifications/unsubscribe-auth/AA65HNPMOCV45QXFDYCQ2YTRW6IK3ANCNFSM4FO6BILA .
this is the unit that i am using HiLetgo MAX30102 Low Power Heart Rate Click Sensor Breakout Board Module for Arduino Pulse Oximetry Solution SpO2 Replace MAX30100 https://www.amazon.com/gp/product/B07QC67KMQ/ref=ppx_yo_dt_b_asin_title_o09_s01?ie=UTF8&psc=1
On Tue, Jun 16, 2020 at 8:26 PM Charles Ferrick [email protected] wrote:
30102 5 connector pins on one side the other just had the LED and two mounting holes
On Tue, Jun 16, 2020 at 11:52 AM Adeel ahmad [email protected] wrote:
@caferrick https://github.com/caferrick which sensor are you using? is it Maxim's 30102 or some other vendor?
— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/sparkfun/SparkFun_MAX3010x_Sensor_Library/issues/17#issuecomment-644851451, or unsubscribe https://github.com/notifications/unsubscribe-auth/AA65HNPMOCV45QXFDYCQ2YTRW6IK3ANCNFSM4FO6BILA .
Hello, I just want to confirm the same thing about the examples for the SparkFun library. The heart Rate Plotter and Normal example seems to work nice. But the SPO2 example seems to show very unstable values.
I tried to run different drivers with other algorithms, that I found on instructables and the web, but most algorithms use the interrupt line from the sensor. I found 2 sources that have a very good documentation for the algorithms, I will post them here. I am using the driver on a MAX30102 board that I bought from eBay, the pullups for the I2C signals where wrongly connected to 1.8V so I had to cut the track and solder them to 3.3V. The code is running on a TTGO ESP32 board that has also an OLED display, I hope that I can display the graphic for the heart rate on the display like in the Plotter and make some nice menus for other options, but first I need some reliable algorithms.
