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Universal infrared adapter for air conditioners
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology.
2015 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This thesis explores how a phone app and an infrared remote control can be used at the same time in order to control air conditioners. It introduces the concept of a universal adapter able to recognize a command from an air conditioner's remote control in order to update the phone app. This project extends prior work on universal devices focusing on infrared communication by examining the relationship between the different infrared protocols used for air conditioners from different manufacturers. This thesis proposes a model of a universal infrared adapter. This adapter is able to recognize a command from an air conditioner's remote control if this one is registered in the database. If not, the adapter can also learn the different commands of the new remote control and save it in the database. A sample of 4 air conditioners from 4 different manufacturers has been tested for this thesis. With a comparative case analysis, this research explored the role of the position and the size of a setting in the infrared message. The findings from the research illustrate how the different manufacturers are encoding infrared commands. It also show that the impact of the size of the message and the amount of data on the analysis of the data is more complex than previously thought. As predicted, similarities has been found between protocols, allowing the adapter to look for information in specific parts of an infrared message or learn the information from an unknown remote control. The findings provide support for the key arguments and support the prediction that there are similarities between the infrared protocols for air conditioners, allowing the creation of a universal adapter.

Place, publisher, year, edition, pages
2015. , 39 p.
IT, 15080
National Category
Engineering and Technology
URN: urn:nbn:se:uu:diva-280481OAI: oai:DiVA.org:uu-280481DiVA: diva2:910960
Educational program
Masters Programme in Embedded Systems
Available from: 2016-03-10 Created: 2016-03-10 Last updated: 2016-03-10Bibliographically approved

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