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I'm trying to connect Max3012 to Raspberry PI. I actually tested:

  • two Max30102 versions (?): one with 7 holes on one side and another one with 4 holes on one side and 4 holes on another AND,
  • trying to connect it to 4B and ZeroW.

Connecting them as explained here:

3.3V (pin1)             VIN
I2C_SDA1 (pin3; GPIO 2) SDA
I2C_SCL1 (pin5; GPIO 3) SCL
- (pin7; GPIO 4)        INT
GND (pin9)              GND

Obviously, enabled I2C via raspi-config, rebooted but when I run sudo i2cdetect -y 1 all I get is:

     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- --

I searched this forum and couldn't find a solution (already tried writing a totally fresh system to SD card, using/not using prototype board, using different wires, nothing helps). What am I missing?

Photos:

Pi

Max30102

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12
  • 1
    You have not connected the devices to the bus properly. Don't ask us to guess what you have done wrong, show us,
    – joan
    Commented Nov 28, 2020 at 23:08
  • 1
    @joan do you mean photos of the pi + max30102?
    – bbb
    Commented Nov 28, 2020 at 23:14
  • 1
    Yes, we need to be able to clearly see the connections pin to pin so we can be sure the correct pins are securely connected.
    – joan
    Commented Nov 28, 2020 at 23:17
  • 1
    @joan added photos.
    – bbb
    Commented Nov 28, 2020 at 23:35
  • 2
    Pics do not help - too many red and black wires to identify any cable errors...
    – user115418
    Commented Nov 29, 2020 at 0:37

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