McDonald's has announced they’ve begun testing the power of beacons. At several franchise locations in Columbus, Georgia customers are being treated to deals via iBeacon technology. The rollout is done in partnership with Piper, a provider of low-energy beacon solutions, with plans for a wider rollout once the kinks are ironed out. If they've got Bluetooth on, customers may see special offers or coupons pushed to their handsets, which can be redeemed at purchase. According to Piper, it’s working well.