Every time an IoT developer starts thinking about choosing an operating system for a new device, there is a myriad of options available to muddy the waters. Many are from well-known providers, like FreeRTOS from Amazon and Azure RTOS from Microsoft, or Zephyr RTOS from Linux, and they each have several features that are aimed at helping IoT developers make the most of their IoT device designs. 

So how do you know which real-time operating system (RTOS) to choose? Let’s start by looking at the roles of RTOS within IoT. Then, we’ll discuss how FreeRTOS and Azure RTOS can each fulfill those roles in different ways. 

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