PI3 won't detect any i2c sensor

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)

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Reply to
adrew9000
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Did you enable i2c in the setup/preferences? It's disabled by default.

Reply to
ray carter

Reply to
adrew9000

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

Reply to
Gordon Henderson

It may also be that the necessary pull-up resistors are missing from SDA, SCL or both.

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-TV
Reply to
Tauno Voipio

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

Reply to
edijsedija

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

Reply to
adrew9000

Il giorno domenica 18 febbraio 2018 22:12:39 UTC+1, Andrew ha scritto:

have you tried with i2cdetect -y 0 ?

the only other thing to try is to get an oscilloscope and check the signals...

Bye Jack

Reply to
jack4747

They are fitted to the Pi as standard.

Gordon

Reply to
Gordon Henderson

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