Build a cloud-ready temperature sensor with the Arduino Uno and the IBM Watson IoT Platform, Part 2: Write the sketch and connect to the IBM Watson IoT Platform

Learn about MQTT (formerly Message Queueing Telemetry Transport), the
protocol for the Internet of Things (IoT), and how you can implement MQTT on
the Arduino. Explore the tools and techniques for testing and debugging
problems with MQTT locally, and write an Arduino sketch that connects to the
IBM Watson IoT Platform for graphing custom data.


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