Optimizing power consumption of Wi-Fi inbuild IoT device : an MSP430 processor and an ESP-03 chip provide a power-efficient solution

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Thomas, Darshana and McPherson, Ross and Paul, Greig and Irvine, James (2016) Optimizing power consumption of Wi-Fi inbuild IoT device : an MSP430 processor and an ESP-03 chip provide a power-efficient solution. IEEE Consumer Electronics Magazine, 5 (4). pp. 92-100. ISSN 2162-2248 (https://doi.org/10.1109/MCE.2016.2590148)

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Abstract

The Internet of Things (IoT) -- connection of small smart sensors, actuators and other devices to the Internet -- is a key concept within the smart home. To ease deployment, such devices are often wireless and battery powered. An important question is the wireless interface used. The ubiquity of Wi-Fi in homes today makes this an attractive option, but the relatively high power requirements of Wi-Fi conflict with the requirement for long battery life and low maintenance. Lower power alternatives, such as Bluetooth and Zigbee, have been proposed, but these have a much smaller installed base. In addition, many Smart Home products are currently available using 433MHz technology. This paper considers whether it is possible to reduce Wi-Fi power usage to the point where cheap Wi-Fi based products can be used instead of other protocols. The paper undertakes power analysis of a wireless sensor with an SoC Wi-Fi module, with and without a separate microcontroller optimised for low power usage which can be used to switch the Wi-Fi module on and off. This paper is an extension of previous work comparing Wi-Fi and 433MHz devices, and so we compare 433MHz to the optimised Wi-Fi sensor. Finally, the paper considers the energy usage of DHCP, demonstrating that further energy savings can be made if the application handles IP addressing and presents a static IP address to the Wi-Fi module.

ORCID iDs

Thomas, Darshana ORCID logoORCID: https://orcid.org/0000-0002-2647-5544, McPherson, Ross, Paul, Greig ORCID logoORCID: https://orcid.org/0000-0002-6070-3192 and Irvine, James ORCID logoORCID: https://orcid.org/0000-0003-2078-6517;
  • Item type:Article
    ID code:57719
    Dates:
    Date
    Event
    1 October 2016
    Published
    29 June 2016
    Accepted
    Notes:(c) 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
    Subjects:Technology > Electrical engineering. Electronics Nuclear engineering
    Department:Faculty of Engineering > Electronic and Electrical Engineering
    Depositing user: Pure Administrator
    Date deposited:07 Sep 2016 15:58
    Last modified:12 Dec 2024 04:21
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/57719
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