Wireless sensor and actor networks are crucial elements of today's effort to support and implement \textit{Industry 4.0} architectures and modern manufacturing processes.
Small programmable logic controllers (PLC) and cloud computing are enabler but also drivers of these new manufacturing paradigms \cite{Nigappa:2016eb}.
Thus, the networked interconnection of everyday objects, the automation of home appliances and environmental metering and monitoring based on sensor and actor networks controlled by ESP-based chipsets are subject of current research.
Thus, the networked interconnection of everyday objects, the automation of home appliances and environmental metering and monitoring based on sensors and actors controlled by \textit{ESP8266} PLCs are subject of current research.
In \cite{DiNisio:2015fg} a low-cost multipurpose wireless sensor network using \textit{ESP8266} PLCs is introduced.
The usage of \textit{ESP8266} PLCs for sensor networks is discussed in \cite{Thaker:2016fi}.
The article \cite{Kodali:2016hc} presents a home automation solution based on a \textit{MQTT}message queue with \textit{ESP8266}-based sensors and actors.
The article \cite{Kodali:2016hc} presents a home automation solution based on \textit{MQTT} with \textit{ESP8266}-driven sensors and actors.
The control of smart bulbs with PLCs is summarized in \cite{Walia:2016bj}.
Unfortunately, software update mechanisms are not addressed in these publications.
Generic approaches of decentralized software updates in IoT environments are introduced in \cite{Weisbach:2016bs} and \cite{Ruckebusch:2016vo}.
