Hello,
I would like to connect a max30102 to the nicla.
I am using the 2 pins intended for the I2C. However, what about the pull-up resistor? I don't see a 3.3v output?
Do you think using GPIO pins 1,2 or 3 would solve my problem?
Interesting question, almost the same as, what is my neighbor putting in the trash can? No idea where you are looking. Why not start with a Schematic, not a frizzy picture as how you intended to wire it. Hand Drawn would work. I would rather help others then chase this because there is no information. With the schematic I think your problem will become very visible to you, if not we will help.
Hi It's me again!
Arduino has recently changed the pin indication which makes everything much easier to understand <3
I connected a max30102 in I2C using pins 1 ,2,6,7 of the J2 header, in other words, gnd, vddio_ext, sda and scl.
Then you launch the I2C scan of the examples provided by arduino.
No need to add a pull-up resistor for me.
/!\ However Vddio_ext supply 100mA, so it's often to much for the components.
I am dealing with this issue.
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