Measure Heart Rate/BPM and SpO2 with MAX30102 + Arduino 

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Use a rolling average filter

@@kugelblitz9137 what is rolling average filter? I have the same problem, max30102 gives me non stable data

what is SPO2

Hello, I can't remember if I tried it or not to tell you if it works first. You can try, first you install the OLED library, do the declarations like in the code I provided, then instead of showing the value on the serial monitor, display it on the OLED.

Sorry, no idea for the moment.

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When there is nothing in front of the sensor you'll get values 0, maybe 100, but when you put finger (not even touching) you are guaranteed to get like 15000, 7000 is a safe value to assume the finger is away

On Uno only pins 2/3 can be used as interrupt's I suggest adding a button to launch the measuring function that will do multiple readings before displaying the result and continue other things...

Same with my project. I think you need to filter the output first with a digital filter.

Hello, wire your module only and upload the i²c scanner code, playground.arduino.cc/Main/I2cScanner/ and check if a device is detected or not... if you soldered the module yourself check if it's good

Did you solve the problem? Because I have the same problem.

Hi, I had a lot of trouble uploading the SpO2 code to the Arduino too, it's due to memory space, and the OLED kept freezing unfortunately so I ended only with the BPM part

@@SurtrTech The 30105 has more functions, so maybe this library uses more resources. Isn't there a specific one for 30102? ,, Or could it work with the 30100? ,,, I imagine you tried to reduce the buffers [100] to [50 ] or [25] ,,? ,,, / only show the "hr" and "spo2" in the oled, without the other unnecessary data / make captures of "spo2" and "hr" using different blocks { },,with local variables within each block or call a function, outside the void loop to spo every so often(not at the same time) and show the average of them during a certain time, for example take data 3 seconds of hr, then average them and show them held in oled, then take 3 seconds of spo2 and do the same This way you would show averages that every 6sec. were updated in the OLED ... or stop for a second every minute to take spo2 since this data does not change much or very fast / in a more extreme case take 8-bit data (uint8_t) in the chain but before catching them, get a rule ratio of 3, so that they do not exceed 255 (8 bit arduinos like (at328/168/2560) use a lot of memory, when using variables of 16 or more bits, because they are native to 8 bits) ../ do not use or show anything that is float / do not show logos or animations while showing the data / use only the smallest font (size 1, "6x8pix") / show on one part of the screen a "hr" data during 1 print in oled and in another print spo2, (the eye does not I would notice it) / use a board with 32u4 (2.5kb ram) or mega2560 (8kb) (but the device would grow) / modify the libraries ... Manage another lighter library of oled like this ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-XYBcr1KpN3Y.html perhaps it would avoid all the above, this supposes using less sram & flash..I could not check all this because my provider will bring me 30102 in 1 week..I will try it in promini 328p, although I already ordered a teensy lc, since I want to add module m.sd (or Eeprom) + accelerometer + display graph in 128x64..I suppose this could do the task (8sram@32bit)..

@@angelruiz825 This library is standard for them all... the problem is that the parameters for BPM are not the same as the SpO2 code, so you have to add all of them... you can maybe modify the libraries or reduce the codes further. The main problem was also the use of the OLED, didn't start at all. Only trying will get you to results.

Well better get one of those module that sticks to the body (ear or finger clip) + GSM module to send a text, you can go furhter if you're using IoT

wow nice, but I need support.

Do you have other tabs in your sketch?

Or do you have two "Setup" functions in your code?

Hello, Never used it with Proteus before, and I couldn't fit both codes in the Arduino as I said in the video, flash memory space problem.

Hello there! Did you succeed ?

@@apocaylips33 No!!

You can try to combine them (two codes from examples). Wanted to do that with my OLED wired... it didn't work.

Hello, yes those are examples from the library, you can find the library in the link below the video, there's one for the serial plotter, and one that prints the IR, BPM and Average BPM, if you want to plot the BPM, you can try the "Example5_HeartRate" and in the serial.print functions leave only "beatsPerMinute" and start the serial plotter instead of monitor, I think you may see the BPM values as a graph

SurtrTech So I’m looking through the libraries and I am having trouble finding it, I’m a beginner and I really don’t know my terms, do u mind naming off the libraries/codes that I would need?

@@mayankgudi5919 Well first download the library "SparkFun_MAX3010x_Sensor_Library" from the link or from here: github.com/sparkfun/SparkFun_MAX3010x_Sensor_Library Once downloaded go to Arduino IDE -> Sketch -> Include library -> Add .ZIP library -> Select the .ZIP library you've downloaded Then Arduino IDE -> File -> Examples -> "SparkFun MAX3010x Pulse and ..." -> Go there and you'll find all examples I used and some other ones just select and you'll aready have a code to upload. For your case: Example 4 will display raw values on the serial plotter, and also shows you peaks when you place your finger. Example 5 will display the IR values (Raw), the current BPM and Avg BPM on the serial monitor but you can remove the IR and Avg BPM to show only the BPM then display it on the serial plotter if you want...

SurtrTech Thank you so much, I finally found it. The video was amazing and thank you for guiding me. I am looking forward to trying this project out myself. Thank you again!

Hello, you can remove all the functions related to the buzzer (Tone and noTone with some delays between them), do you want to remove the "hear beat animation"?

@@SurtrTech i have a private message on your Facebook. Can you see it?

@@user-uy8hq8oz5m Yes, we'll talk there :)

@@SurtrTech hey how can the animation be removed?

Well the SpO2 code sets the module to other parameters than those used in BPM measuring... but you can give it a try and combine the functions and check if ther results are okay. N.B: I tried this using OLED and it didn't work...

@@SurtrTech for lack of flash ?, or ram? ,, throw junk data? ,, or what happened ?, because I use to get the 2 data...

@@angelruiz825 I had flash space problems, I tried in many ways and used less global variables but I failed... and it didn't work with the OLED

Since there is so much data from spo2 you will need to implement can we use fifo to store data temporarily for flow control?

I have no idea, it probably creates a display distortion, if you can start from scratch without animations or anything and test it, first just print the BPM and then re create the bmp images

Hola, ¿Lograste resolver ese problema?, y de ser asi ¿Seria mucha molestia explicarme como lo hizo? o en el mejor de los casos ¿Pasarme las modificaciones que hizo al codigo?

Hello, sorry I don't know what you meant but the values given are actually a percentage, 95% 98%... or do you want them like 0.95 0.98...? Just a simple divison can do the work.

Well you have BPM, little math you'll get IBI, but for precise calculation you can calculate the millis() every beat and store them on a array

Yes

@@SurtrTech thanks for the Swift feedback!

Make sure it's well soldered and try different examples.

Hello the Spo2 code is just an example from the library, you'll find everything in the link below the video

Hi, you can find it here after download this library. Let find it in examples. github.com/sparkfun/SparkFun_MAX3010x_Sensor_Library

You can check the link it's where you'll find the library and within there's the SpO2 in examples

The code I used with the animation doesn't include the SpO2, as I said there was a memory problem, but in the examples there is one that measures the SpO2, you can adapt it to the OLED

@@SurtrTech Thank you very much !!!

Hello, well the library is called MAX3010x and it includes the MAX30101 too, it should be good.

@@SurtrTech SO do I follow the exact similar process as in the video for MAX3010x as well, including codes and libraries ??

@@sandeshtayde1516 Yes.

ETC Official . did you manage it with MAX30101 because i cant do this.

Hi, is that you who contacted me on Hackster?

Hi, unfortunately not. I saw the project there but i don’t have an account on hackster and i thought would be better if i leave you a comment here. Do you think you could help me?

@@alexandranistor6605 Well I want to help but the problem that was just a picture of the module, it's not a fully functionnal Fritzing part, I wanted to create the part but it's not working, I could send you the image I used + SVG file if you want

@@SurtrTech It's more than enough. I just need it for the fritzing scheme, to wiring it with my other components. It doesn't have to actually work.

@@alexandranistor6605 How do I send them to you? You can contact me on FB page if you want or send a mail here surtrtech1366@gmail.com

Selfish? Well all the schematics, libraries and codes are already on the link for anyone to use... The SpO2 code is on the library example it's made by SparkFun... As mentionned in the video I couldn't upload a code that measures both BPM and SpO2 while operating the OLED, the code was too big and the OLED keeps freezing, so I ended up with BPM only. You can give it a try, first upload the SpO2 code from examples and then adapt it to the OLED as I did, all you have to do is add OLED libraries, replace functions and here you go.

Hello, it's in the library examples as well