Microsoft built its own custom Linux kernel for its new IoT service

[TechCrunch ]

At a small press event in San Francisco, Microsoft  today announced the launch of a secure end-to-end IoT product that focuses on microcontroller-based devices — the kind of devices that use tiny and relatively low-powered microcontrollers (MCUs) for basic control or connectivity features. Typically, these kinds of devices, which could be anything from a toy to a household gadget or an industrial application, don’t often get updated and hence, security often suffers.

Why use Linux? “With Azure Sphere, Microsoft is addressing an entirely new class of IoT devices, the MCU,” Rob Lefferts, Microsoft’s partner director for Windows enterprise and security told me at the event.” Windows IoT runs on microprocessor units (MPUs) which have at least 100x the power of the MCU. The Microsoft-secured Linux kernel used in the Azure Sphere IoT OS is shared under an OSS license so that silicon partners can rapidly enable new silicon innovations.” And those partners are also very comfortable with taking an open-source release and integrating that with their products.

To get the process started, MediaTek is producing the first set of these new MCUs. These are low-powered, single-core ARM-A7 systems that run at 500MHz and include WiFi connectivity as well as a number of other I/O options.

As far as the open ecosystem goes, Smith also stressed that the devices can be used with services that run on any other cloud, no matter whether that’s AWS or the Alibaba Cloud.