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aromring / MAX30102_by_RF

Arduino C code for MAX30102 pulse oximetry sensor (MAXIM Integrated, Inc.)
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Can't Print SPO2 on OLED #41

Closed AustinTetteh closed 2 months ago

AustinTetteh commented 2 months ago

Thanks for your algorithm on spo2 which works better than the maxim's code. I'm trying to print the spo2 values on an OLED. For the OLED, I'm using ssd1306 asciiWire library which uses low memory. The spo2 algorithm works perfectly when I run it separately as I'm able to print the values on a serial monitor. The OLED also works perfectly when I display something on it.

However when I merged the codes and try to display the spo2 on the OLED, the code resets and the setup function starts again. The memory usage says sketch uses 40% of memory and dynamic memory uses 60%.

I've used the maxim's algorithm and I get the values being displayed on the OLED. With that it, sketch uses 60% and dynamic memory uses 88%

AustinTetteh commented 2 months ago

mod_spo2_090925.zip This is the merged code for the OLED and spo2 algorithm

aromring commented 2 months ago

Is this a bug in my code? If yes, then submit all the data and graphics as described in README. Other than that it could be some asciiWire conflict, but I'm wildly speculating. Good luck debugging your OLED code!

AustinTetteh commented 2 months ago

These are the files Red and IR values.xlsx Red and IR values By the way, I've also used the adafruit ssd1306 library for OLED and I had same problem. Hoping to hear from you soon. Regards.

AustinTetteh commented 2 months ago

I've fixed it. It was memory issue. I think the Arduino didn't have enough memory to store 200 32 bit data samples. So I changed the sampling time to 2 seconds hence the buffer size became 50 and I recalculated the sum_X2 variable. It's working now. Thanks

aromring commented 1 month ago

I am glad you've found the bug.