This demo presents a room-level localization solution built on top of the market leading SmartMesh IP industrial low-power wireless mesh network. Without any changes to the hardware or protocol stack of that product, we re-purpose Blink-a feature designed to allow for mobile nodes-for localization. We demonstrate how we can deploy the resulting localization solution throughout a building by installing an anchor node in each room, and locate the room a mobile tag is in. Initial results indicate that this solution offers over 90% room-level localization accuracy, and at worst adjacent room localization. The unique aspect of it is that the entire network of anchor nodes in battery powered and operates for years on a pair of AA batteries. There are countless applications looking for easily to install and fully battery powered room-level localization, for which our solution, which is production-ready, is ideal.