As seamless as smart-home technology is becoming, the devices still tend to sit in isolated ecosystems. Zigbee-based gadgets don't normally know how to use Nest's Thread protocol, for example. That's where the Zigbee Alliance wants to help. It's launching Dotdot, a "universal language" for Internet of Things devices. The open platform lets hardware makers use Zigbee's software layer across virtually any other IoT network, increasing the chances that the devices you want to use can speak to each other.