Dart is a client-optimized language for developing fast apps on any platform. Its goal is to offer the most productive programming language for multi-platform development, paired with a flexible execution runtime platform for app frameworks.
MQTT is a lightweight IoT messaging protocol based on publish/subscribe model, which can provide real-time and reliable messaging services for connected devices with minimal code and bandwidth. It is widely used in industries, such as IoT, mobile Internet, smart hardware, Internet of vehicles, and power and energy.