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oxullo / Arduino-MAX30100

Arduino library for MAX30100, integrated oximeter and heart rate sensor
GNU General Public License v3.0
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Stuck at "Initializing pulse oximeter" #56

Closed RinoHandarta closed 5 years ago

RinoHandarta commented 5 years ago

Troubleshooting checklist [OK] I read the README (on master) thoroughly [OK] I ran the MAX30100_Tester and I'm going to paste the output down below [OK] I filled in all the details of my setup down below Description of the issue Hello, I just run MAX30100_Tester and get stuck in the serial monitor at "Initializing pulse oximeter.." Why did that happen? My MAX30100 - Arduino Wiring: VIN -> 3.3V GND -> GND SDA -> SDA SCL -> SCL INT -> D2 snipaste20190204_153956

Regards, Rino max30100 stuck

The output from MAX30100_Tester example Initializing MAX30100

Details of my setup Arduino hardware: Arduino Uno R3 Arduino framework version: Arduino IDE 1.8.4 MAX30100 library version: v1.1.0

oxullo commented 5 years ago

@RinoHandarta this is likely to be an I2C communication issue. Please doublecheck the README for some hints about the troubleshooting. Watch out also for the breakout board you're using, some are badly designed, in particular, check for the pullups resistors to SCL and SDA. Plus, it's likely that you're running an atmega328p at 5V with the I2C lines pulled up to 3V3: this might work but it's usually not recommended.

oxullo commented 5 years ago

Closing due to inactivity. Feel free to reopen

Sv443 commented 4 years ago

I'm having the same issue and I'm currently looking for a solution.
I found this answer in issue #27 but I want to know if there's another way except buying an I²C level shifter module and waiting for it to ship.
Any other ideas why this may be caused? I've already checked the wires' resistance, which is completely fine.