Heart rate sensor MAX30102

[astanapane]

Changed to input both portc.1 and portc.2

This is the module.

https://reedpaper.wordpress.com/2018...x-wrong-board/

I have also following the "fix". Well module is 3.3V but i have never seen in all of the Arduino connections any note.

I have changed the connections and used the 3.3V output from the Display to power the rest of the circuit.

I dont beleive that i have burned the module as this is the result before i change the voltage supply from 5V to 3.3V.

i2cwrite sda,scl,$AE,$04
pause 100

This is the proof of ACK in 9th bit. As from the data sheet if the Id is the right one, the module pulls down the SDA during 9th bit to acknowledge receipt of data.