AWS IoT Core, a managed cloud service that lets customers connect billions of IoT devices and routes trillions of messages to AWS services, and AWS IoT Core Device Advisor, a cloud-based fully-managed test capability to help developers validate their IoT devices for reliable and secure connectivity with AWS IoT Core, announces the General Availability of an upgraded message broker service that includes support for the MQTT version 5 protocol. MQTT5 is an updated device-to-device messaging communication standard that includes significant feature improvements over the previous MQTT version 3.1.1.