MasterCard's "Restroom For All" promoting the message of acceptance for all was named Best of Show at the Association of National Advertisers' Multicultural Excellence Awards on Sunday night, after also winning the LGBT category. The ANA is holding its annual multicultural conference in Miami this week.

McCann XBC, McCann Worldgroup's dedicated agency for MasterCard, debuted a restroom open to any human being at last year's NYC Pride parade. The idea was to turn around North Carolina's then-in-the-news "bathroom bill," requiring people to use public restrooms corresponding to the sex on their birth certificate, and make a dramatic gesture in favor of equality.

How it works: McCann XBC developed a custom API for a Bluetooth-controlled lock, combined with a pulse sensor and an Arduino Yun micro controller that wirelessly communicated with the restroom lock. As an extra touch meant to signal love and acceptance, the technology came in the form of a heart-shaped design. Parade-goers touched the fingerprint sensor to prove they were human, and that caused LED lights to light up the heart to the rhythm of their heartbeat. It also wirelessly unlocked the door to the restroom.