I2C woes at 2.5VDC
I'm having trouble speaking to an I2C device that I know works.
I have the I2C device powered from the 2.5V on the expansion doc -- my device can run from 1.8-3.3VDC. I've tried both 1K and 10K pull-up resistors, but still can't get a response in i2cdetect.
Any ideas as to what might be wrong? My multimeter and logic analyzer aren't currently available.
@Marc-Nicholas I should point out this is an original Onion and not the 2.
You may not need pullup resistors on the I2C lines; in this I2C LCD tutorial, we've been able to detect and control the display by hooking the lines straight up to each other on both Omega1 and Omega2: https://wiki.onion.io/Tutorials/Python-I2C-LCD-Display