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Electronic devices have been dabbled into houses to perform automatic tasks and fulfill different needs such as illumination, cooking, air conditioning, surveillance, among others. Furthermore, those elements can collect data from the environment in order to be processed and give better products and services, so, Internet of Things capabilities arises to home, highly cohesive with domotics. However, for developing countries, smart appliances are expensive, and old fridges, washing machines, etc., are still operative, so they must not to be discarded. Other very used appliances are stoves, which work with heating methods like electrical resistances, electrical induction or natural gas. The last one is the most used in a plenty of countries, due to its advantages regarding cost, for instance. Nonetheless, bad manipulation can cause gas leakages, and furthermore, injuries to people and conflagrations, affecting human lives and assets. Thus, a need has been identified regarding gas safety of gas stoves, conserving the installed base. This work shows the results of the main research and design considerations of a new cutting-edge technology that protects people of bad manipulation of already installed or new gas stoves, including the Internet of Things in order to monitor in real-time possible gas leakages and take actions. [ABSTRACT FROM AUTHOR]

Cold chain is a term related to the equipment and processes used to keep the correct temperature, in which the products, such as food, vaccines, blood, tissues, amongst others, should be stable to be preserved. Any change in temperature can cause a damage in the specific properties in products. Because of that, it is mandatory to constantly monitor temperature and log it to offer traceability. Furthermore, if products must be transported, the position coordinates should be taken into account as well, due to the possibility of making mistakes in logistics personnel, taking non-optimal routes to arrive to the destination, and increasing transportation time. Thus, logistics managers need tools to measure, save and analyze temperature and position in real time to make the most optimal decisions. The implementation of systems meeting Ubiquitous Computing can fulfill the challenge, because the generated information is available to be read, modified and stored everywhere and every time. Besides, messengers can be warned about anomalies regarding change of temperatures or coordinates, adding context awareness to the system. This work aims to show a novel architecture to monitor cold chains by using Ubiquitous Computing paradigm, by means of Single Board Computers. The system includes instrumentation, embedded processing with Single Board Computers, real time databases, Human Computer Interfaces, remote management and support to deploy a complete solution. By using this system, companies ensure traceability and integrity of data in cold chains. A study case is presented to validate the approach. [ABSTRACT FROM AUTHOR]