Feather HUZZAH32 I2C pullup resistor placement (pic)

[icodegfx]

Hi guys, the HUZZAH32 overview states that the I2C data pins need a pullup resistor.

Note that the I2C pins do not have pullup resistors already! You must add them if you want to communicate with an I2C device

I'm planning on using an RGB color sensor and was hoping I could get a second set of eyes on this diagram. What I am not fully certain about is the placement of a 10k (10k?) resistor.

New Project.jpg (89.59 KiB) Viewed 114 times

Thanks.

[icodegfx]

I'm not really sure where to go from here.
- I checked my soldering and it looks solid.

huzzah32 tcs34725 RGB sensor (1).jpg (314.11 KiB) Viewed 102 times

- I shifted the boards on the breadboard to make sure it is not a faulty one
- I disconnected and reconnected all the cables to make sure they were making contact
- I tried using both M0 and M1 data pins on the HUZZAH32
- I tested the HUZZAH32 and it runs other sketches just fine
- I even tried resistor values ranging from 1.5k to 10k

New Project (1).jpg (99.51 KiB) Viewed 102 times

any suggestions would be most welcome

[icodegfx]

ok I found this suggestion on another post.

Try I2CScanner.jpg (34.25 KiB) Viewed 99 times

I tried the I2CScanner.ino sketch and I get this output:

I2CScanner output.jpg (33.18 KiB) Viewed 99 times

Adafruit please advise:)

[adafruit_support_carter]

Adafruit I2C breakouts include the required pull up resistors. So you don't need to add any additional external resistors.

Here's how to wire the sensor to a Feather:
https://learn.adafruit.com/adafruit-col ... -2976705-1

Looks like you're on the Feather's SPI pins, not the I2C pins. So just need to remove the external resistors and re-wire to SCL/SDA.

[icodegfx]

Looks like you're on the Feather's SPI pins, not the I2C pins. So just need to remove the external resistors and re-wire to SCL/SDA.

Egg on my face. Thank you Adafruit. It works beautifully.

Found RGB Sensor.jpg (83.08 KiB) Viewed 90 times

[adafruit_support_carter]

Yeah! No worries. Glad it was something easy and it's working now. Have fun!