Adafruit IO's MQTT API exposes feed data using special topics. Message Queue Telemetry Transport, is a protocol for device communication that Adafruit IO supports. Use a MQTT library or client to publish/subscribe to a feed and to send/receive feed data. Adafruit is a system that makes data useful by allowing simple data connections with little programming required. Adafruit Industries promotes teaching, sharing, engineering, DIY electronic kits, open source hardware and more.