Hmm definitely not expected behavior!
jaredwolff it looks to me as if SDA is just permanently stuck on HIGH.
Back to this, the SCL line is toggling though? If you put the particle board on a breadboard, do both (SDA & SCL pins) toggle?
What version of Device OS are you using?
Back to this, the SCL line is toggling though?
I recall seeing that, yes (edit: though now I’m questioning myself after you asked).
If you put the particle board on a breadboard, do both (SDA & SCL pins) toggle?
Yes. I am now testing this with 3 different Argons and 2 different Xenons. I also dug out a breakout board for the HPMA and another I2C temp/humidity sensor (though not an Si7021) and together with the CCS811 breakout board I mentioned above I recreated the AQW on a breadboard. This works, including the code for listing I2C devices from above.
There is definitely something wrong with the AQW board.
On a sidenote, I use 2.2k or 4.7k resistors as pullups for the I2C lines, usually. Isn’t 20k a little high, especially if someone were to power the Argon off a battery?
Hey Jared,
i had some time over the weekend so I checked again. Neither SCL nor SDA are triggering when the Argon is plugged into the AQW. Is it possible that the Si7021 is also defective and is causing this?
Hi again Jared. I’m at my wits’ end here.
Would you be able to replace the AQW?
otherguy since you bought it through GroupGets, you’ll have to contact them to get a replacement/refund. Unfortunately, I personally have no stock of this board left otherwise I would have had one in the mail to you already. Sorry 
Unfortunately, neither does GroupGets 
I’ve seen that your code references an updated version. Are you planning to release one in the future?
otherguy maybe in the future.
@otherguy send me an email with your info hello@jaredwolff.com. I’ll keep you in the loop on this issue further.
otherguy sent you an email.
