no red light Arduino Uno + MAX30100

[jskim096]

Troubleshooting checklist

• [ check ] I read the README (on master) thoroughly
• [ check ] I ran the MAX30100_Tester and I'm going to paste the output down below
• [ check ] I filled in all the details of my setup down below

Description of the issue

Output from MAX30100_Tester example

Details of my setup

• Arduino hardware: Arduino UNO
• MAX30100 breakout: Green Board
• Arduino framework version: Arduino 1.8.5
• MAX30100 library version: 1.2.1

my connection :

arduino UNO <--------> MAX30100 3.3v Vin A5 SCL (4.7kohm pull up) A4 SDA (4.7kohm pull up)
D2 INT (4.7kohm pull up) GND GND

the code is MAX30100_Minimal

and I removed three register solder and connect external 4.7k ohm register.

3days ago my MAX30100 sensor work well like below picture.

but now it doesn't work same in spite of the same circumstances.

I don't know why my MAX30100 sensor red light isn't on.

Apparently, it worked well until three days ago.

I read all past issue and try that (change register, bread board, convert 3.3v to 5v) but doesn't work :(

and When it is 3.3v, it outputs 'Initializing pulse oximeter..FAILED' and when it is 5v it prints 'Initializing pulse oximeter..'.

and when it is 5v the MAX30100 sensor red light comes in for about half a second very short.

Is there anyone who can help me?

sorry for my english.

[zelalem2]

Can some one comment on this, the same thing happend to me too.

[electricmaster9]

This may help you: https://reedpaper.wordpress.com/2018/08/22/pulse-oximeter-max30100-max30102-how-to-fix-wrong-board/

[allenchak]

I have same issue, but after some google and tries. Its work fine with ProMini 3.3v and without changing the PCB.