This article describes the implementation of durable and stable system for building firmware updates for embedded systems based on \textit{ESP8266}\cite{ESP8266} microcontrollers. This includes the mechanisms used to build the updates, distribute and install them on the device.
Over the last years, a rapidly growing number of IoT devices is found on the market, especially in the area of the so-called smart home.
These devices, which are deployed in vast numbers and frequently in use over many years, pose a risk to the internet as a whole if not provided regularly with security patches.
Hence, a fully automated process for large-scale software updates of such embedded devices must be considered.
In this article, we present an implementation of a durable and stable system for building and publishing cryptographically secure firmware updates for embedded devices based on \textit{ESP8266} microcontrollers.
This includes mechanisms to build the updates from source and automatically sign, distribute and install them on the target devices.
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Sven Reissmann
7 years ago