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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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    You have not connected the devices to the bus properly. Don't ask us to guess what you have done wrong, show us, – joan Nov 28 '20 at 23:08
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    @joan do you mean photos of the pi + max30102? – bbb Nov 28 '20 at 23:14
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    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 Nov 28 '20 at 23:17
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    @joan added photos. – bbb Nov 28 '20 at 23:35
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    Pics do not help - too many red and black wires to identify any cable errors... – user115418 Nov 29 '20 at 0:37

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