Issues With I2C and Beagle Board Black?

[George Faraj]

Both with the BBB and the BBBW I have been unable to detect any I2C devices. both have Debian 8.6 images (the most recent one I believe). 

My device is properly wired with the CL going to P9_19 and DA going to P9_20 and I used a multimeter to ensure its powered properly.

I've tried all the I2C pins on the BBB and whenever I run i2cdetect -y -r #  (my i2xdetect-tools is the most recent) all I get is either a blank matrix with a couple of UUs or a completely blank matrix. 

I am a beginner and I get the feeling that what I am missing is something very basic, if anyone else has been having this issue please let me know how you solved it!

The i2c devices Ive tried are: HTU21D temp and humidity sensor, and an ADS1015.

[Gerald Coley]

What is the value of your pull up resistors on SCL and SDA?

Gerald

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Gerald

 

ger...@beagleboard.org

http://beagleboard.org/

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[William Hermans]

George, how about you give us  step by step of exactly what you're doing to try to get this working. Assuming Gerald's suggestion does not work out for you.

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