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PI - 16ADC I2C detects all addresses

prithd

Purchased a PI-16ADC hat for my raspberry pi 3 to measure data from pressure sensors. However, when I connect it to the raspberry pi and run the i2cdetect code on terminal it detects all the addresses instead of the default 76 of the converter. 

I2C is enabled and I checked all my gpio pins as well, it all works fine. I have been using a MCC 134 DAQ HAT to measure temperature which does not work on I2C but is functioning fine. Maybe that creates an issue making I2C unusable? 

Any help would be appreciated. 

Thanks! 

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  • Hi,

    You could probe the wires (with a 'scope - could even be a really cheap oscilloscope since the required bandwidth is so low). There are only two wires to examine, you'll quickly see if the I2C lines are at the correct levels, and if there is a real response, or if (say) the wires are being pulled low for some other reason. You could probe both with and without the HAT board attached.

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  • Hi,

    You could probe the wires (with a 'scope - could even be a really cheap oscilloscope since the required bandwidth is so low). There are only two wires to examine, you'll quickly see if the I2C lines are at the correct levels, and if there is a real response, or if (say) the wires are being pulled low for some other reason. You could probe both with and without the HAT board attached.

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