In our view, the only thing the Raspberry Pi is truly lacking is an I2C port. (Of course you may have guessed by looking at our product offerings, we are admittedly a little biased. No worries.)
The OUTPI is a non-invasive I2C adapter complete with level shifter providing you with a 5V I2C port for use with ANY of our I2C devices. The I2C port points outward toward the outside edge of the board and may interfere with some enclosures without modifications. The OUTPI does NOT consume the 26-pin expansion port, as it is equipped with a pass-through connector, freeing the 26-pin connector for other purposes, making it a truly non-invasive design.