I played around with the multimeter already and also tried different cables
(event swapping them around)

I also tried to add pull-up resistors from 3.3V

On Sunday, 18 February 2018 18:25:07 UTC, Tauno Voipio  wrote:
> On 18.2.18 20:07, Gordon Henderson wrote:
> > In article ,
> >    wrote:
> >> I have tried different tutorials and forums where people had same/similar
issues with i2c but still, I can't
> >> solve this problem.
> >>
> >> I tried two different BMP180 Digital Barometric Pressure Sensor modules
and even IIC/12C/TWI 1602 Serial LCD module
> >>
> >> None of them showed up on the i2c detect -y 1
> >>
> >> I have Raspberry PI 3 B and the following versions and Raspbian GNU/Linux
9 (stretch)
> >>
> >> https://forums.adafruit.com/download/file.php?id=55367
> >
> > Check power on the sensor board itself with your multimeter. Then
> > (assuming that's all OK at 3.3v) check the SCL and SDA wires - swap
> > them over - it won't hurt anything, but it's easy to get these the wrong
> > way round.
> >
> > Try one device at a time too.
> >
> > Gordon
> >
>
> It may also be that the necessary pull-up resistors are
> missing from SDA, SCL or both.
>
> --
>
> -TV

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