Resolved! I'm trying to use the I2C multiplexer TCA9548A and I can't seem to get any output from the output ports.
I'm using the Nucleo32L031 board connected to a Adafruit TCA9548A 1:8 multiplexer board. I have the board setup properly, Vcc = 3.3, GND, SCA and SCL pins double checked. I have a Sparkfun TMP102 temp sensor board connected to the TCA9548A's port0.I ...