Thanks, I got the I2C to "work" using A4/A5. Not sure why SDA/SCL on the digital pin jumper doesn't work. I can read the I2C address of the sensor most of the time, but often it still reports no I2C device. In those cases where the Edison can read the I2C addresses of the sensors, I am not getting any data from the sensors. Maybe there is too high (or low?) a pullup resistance. How can I set the internal pullups (or turn them off) on the Arduino breakout board?
I would suggest that a sample Edison sketch showing use of I2C (and SPI, for that matter) on the Arduino breakout board might be useful to a lot of people struggling as I am. Or maybe it's just me!
