Download Arduino Nano I2C Beispiel Images. Arduino nano is based on the atmega168/328 chip, which does support spi in hardware. You probably think (as i did and as the guys laying out the pinout once you wire it up correctly, this arduino i2c scanner will let you know you have proper connectivity and the address for the device

Arduino-er: Arduino Nano + GY-271 (Digital Compass module ... from 1.bp.blogspot.com

Ein arduino ist dabei der master, der andere arduino der slave. I had some confusion initially but later found out that sda and scl on arduino nano are available on a4 and a5 pins. Maybe it is because many of the pinout diagrams for the nano have scl and sda on the wrong pins.

I`m trying to make i2c working on my arduino nano v3.0 (with a gravitech.us text on it) bought from ebay (some cheap china clone).

Es funktioniert aber genau so auch mit uno, mega. Es funktioniert aber genau so auch mit uno, mega. Which pins you need for arduino and esp8266 microcontroller to connect devices through i2c. Note that you could bitbang (relatively) slow spi without any problems, this would be a relatively easy software implementation.