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The Nest Learning Thermostat (or Nest Thermostat) is a smart thermostat developed by Nest Labs and designed by Tony Fadell, Ben Filson, and Fred Bould. It is an electronic, programmable, and self-learning Wi-Fi-enabled thermostat that optimizes heating and cooling of homes and businesses to conserve energy. The device is based on a machine learning algorithm: for the first weeks users have to regulate the thermostat in order to provide the reference data set. The thermostat can then learn people's schedule, at which temperature they are used to and when. Using built-in sensors and phones' locations, it can shift into energy saving mode when it realizes nobody is at home.

machine learning self-learning smart thermostat
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Entry Collection: HandWiki
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Update Time: 07 Oct 2022
Table of Contents

    1. Specifications - North American Versions

    Device
    Photo
    Generation Version Released Screen Size Wi-Fi 802.15.4 24 V 120–
    240 V
    Multiple
    Zones
    1 – 2
    Stage
    Cooling
    1 – 3
    Stage
    Heating
    Forced
    Air
    Radiant Heat
    Pump
    Oil Gas Electric Hybrid
    Systems
    Humidistat
    1st 1.10 Q4
    2011
    2.75" Yes Yes Yes No Yes 1
    stage
    only
    1–2
    stage
    only
    Yes Yes Yes Yes Yes Yes No No
    1st 1.12 Q1
    2012
    2.75" Yes Yes Yes No Yes 1
    stage
    only
    1–2
    stage
    only
    Yes Yes Yes Yes Yes Yes No No
    2nd 2.6 Q3
    2012
    2.75" Yes Yes Yes No Yes Both All Yes Yes Yes Yes Yes Yes Yes Yes
    2nd 2.8 Q3
    2013
    2.75" Yes Yes Yes No Yes Both All Yes Yes Yes Yes Yes Yes Yes Yes
    3rd 3.4 Q4
    2015
    3.25" Yes Yes Yes No Yes Both All Yes Yes Yes Yes Yes Yes Yes Yes
    E 4.x Q3
    2017
    1.8" Yes Yes Yes No Yes Both 1–2
    stage
    only
    Yes Yes Yes Yes Yes Yes Yes hygrometer
    • Note: Generation E supports 2 stage cooling OR 2 stage heating OR heatpump due to a shared multi-use terminal.
    Generation Release Date
    1st October 25, 2011 [1]
    2nd October 2, 2012 [1]
    3rd September 1, 2015 [1]
    E August 31, 2017

    2. Hardware

    Nest is compatible with most standard HVAC systems that use central heating and cooling and uses industry standard connections to facilitate the control of these appliances.[2]

    Nest is not compatible with communicating HVAC systems. Communicating systems are used with some two-stage and all variable-capacity HVAC systems. These systems require just four wires – two power wires for heating and cooling and two for communication between components (see photo). [3]

     
    Existing thermostat wires for communicating systems. This system is not compatible with Nest. By Bree888 - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=68772534

    Nest consists of two primary pieces of hardware. The display contains the main printed circuit board (PCB) and rotating ring, and the base (pictured) houses the connection terminals, bubble level, and holes for wall anchors. Neither can function independently; if separated, the display becomes inactive until reconnected to the base.[4]

    A special version of Nest is available in Europe, which is capable of controlling 230 volt heating systems. The Nest is paired with a "Heat Link" device, which contains the circuitry required for controlling the mains-voltage heating system.[5] The first release was the 2nd Generation Nest thermostat which the Heat Link controlled the central heating boiler.[6] The 3rd Generation added support for OpenTherm and for controlling domestic hot water.[7] The Nest E was made available to the UK in October of 2018.[8] It has several major changes as the thermostat is stand mounted only, the Heat Link is grey and battery powered, the Heat Link loses the domestic hot water support, and lastly designed to be installed on the wall where the old thermostat was located.[9]

    As the Nest Thermostat can not be battery operated, it must either be installed with a wire connecting directly to the "Heatlink" which supplies 12v DC, or mounted on a Stand and powered via a USB cable.[10]

    The Nest Temperature Sensor was added in March, 2018. Available in google store only for United States and Canada[11]. Up to six of these battery operated devices can be added to a single thermostat to provide remote temperature monitoring. Nest will then use the appropriate sensor based on schedule. Since they use Bluetooth Low Energy they are only compatible with the E and 3rd generation thermostats.[12]

    3. Software


     
    Nest Learning Thermostat showing weather's impact on energy usage

    The Nest Thermostat is built around an operating system that allows interaction with the thermostat via spinning and clicking of its control wheel, which brings up option menus for switching from heating to cooling, access to device settings, energy history, and scheduling. Users can control Nest without a touch screen or other input device[13] . As the thermostat is connected to the Internet, the company can push updates to fix bugs, improve performance and add additional features. For updates to occur automatically, the thermostat must be connected to Wi‑Fi and the battery must have at least a 3.7 V charge to give enough power to complete the download and installation of the update.[14]

    The Nest Thermostat has had a number of software updates.[15] A 2017 security update enables two factor authentication.[16]

    Many have commented on the company's "Nest Community" regarding the lack of prominent display of the current temperature.[14]

    The operating system itself is based on Linux 2.6.37 and many other free software components.[17] To comply with the terms of the GPLv3 license under which some components are available, Nest Labs also provides a special firmware image which will unlock the system so that it will accept arbitrary code sent to it.

    While the thermostat software by Nest Labs itself remains proprietary, a third party has reimplemented the basic logic in an open source replacement called FreeAbode.

    Nest devices interconnect with each other using a protocol called Weave, which is based on IEEE 802.15.4 and Wi-Fi 802.11 b/g/n.[18]

    4. Availability

    Nest is available for sale in the United States, Canada, Mexico, the United Kingdom, Belgium, France, Ireland, the Netherlands, Germany, Austria, Italy, and Spain.[19] It is, however, compatible with many heating and cooling automation systems in other countries.[20] Nest Labs have surveyed existing users known to be outside the areas where it is officially available. Use of the thermostat outside the United States and Canada is complicated by the software setting time and other functions based on the ZIP code. For international users this means they must either disable Wi‑Fi to set the time correctly or use the nearest U.S. zipcode which may result in erratic behavior as the thermostat makes faulty assumptions about inactivity corresponding with either sleep or the home's occupants being away.[21]

    In 2013 a man-in-the-middle hack potentially allowed worldwide users to set up their time zone and local weather.[22]

    5. Marketing

    In an effort to increase the number of homes using their learning thermostats, Nest began to partner with energy companies. In February 2014, Direct Energy and Nest laboratories launched their Comfort and Control plan. The plan allowed Canadian customers in Alberta to receive a learning thermostat when they signed up for a five-year electricity contract.[23] In April 2014, Nest announced a partnership with the United Kingdom energy supplier nPower. The partnership offers customers a cut on the Nest installation price and locked energy prices for 5 years, when customers receive both gas and electricity from nPower and paying with direct debit.[24]

    In June 2014, Direct Energy and Nest Laboratories expanded the package to Direct Energy's United States market.[25]

    6. SKUs / Model Numbers

    • T100577 is 1st Generation, released only in the US
    • T200377 is 2nd Generation, UK release
    • T200477 is 2nd Generation, Canada release
    • T200577 is 2nd Generation, US release
    • T200677 is 2nd Generation, France, Netherlands, and Belgium release
    • T3007EF is 3rd Generation, Canada release
    • T3007ES is 3rd Generation, US release[26][27]
    • T3008US is 3rd Generation, US release, pro packaged
    • T3010FD is 3rd Generation, France release[28]
    • T3010GB is 3rd Generation, UK release[29][30]
    • T3016US is 3rd Generation - black ring, US release[31]
    • T3017US is 3rd Generation - white ring, US release
    • T3018US is 3rd Generation - mirror black ring, US release
    • T3019US is 3rd Generation - polished steel ring, US release
    • T3021US is 3rd Generation - copper ring, US release
    • T3032US is 3rd Generation - brass ring, US release
    • T4000ES is Thermostat E, US release[32][33]
    • T4000EF is Thermostat E, Canada release
    • HF001235-GB is Thermostat E, UK release
    • T5000SF is Temperature Sensor - white, US and Canada release

    T200477 and T200577 are technically the same[34]
    T200377 and T200677 are technically the same, except for the power plug used for the USB charger[35]

    References

    1. https://nest.com/support/article/Nest-Learning-Thermostat-software-update-history
    2. "Power Specifications for the Nest Learning Thermostat". Support.nest.com. http://support.nest.com/article/Power-Specifications-for-the-Nest-Learning-Thermostat. Retrieved 2013-10-17. 
    3. "Pick HVAC Cooling and Heating Guide". http://www.pickhvac.com/faq/communicating-vs-non-communicating/. Retrieved 3 May 2018. 
    4. "The Nest Learning Thermostat will not turn on after installation". Support.nest.com. http://support.nest.com/article/Nest-will-not-turn-on-after-installation. Retrieved 2013-10-17. 
    5. "Nest Learning Thermostat and Heat Link on UK Website". store.nest.com. https://store.nest.com/uk/product/thermostat/. Retrieved 2015-01-11. 
    6. https://nest.com/press/nest-learning-thermostat-now-available-in-the-united-kingdom/
    7. https://nest.com/uk/support/article/What-s-new-in-the-3rd-generation-Nest-Learning-Thermostat
    8. https://www.engadget.com/2018/10/01/nest-thermostat-e-uk-release/
    9. https://nest.com/uk/thermostats/nest-thermostat-e/tech-specs/#nest-heat-link-heading
    10. https://boilerboffin.com/services/smart-thermostats/
    11. https://support.google.com/store/answer/2462844?hl=en
    12. https://nest.com/thermostats/nest-temperature-sensor/overview/
    13. "Nest 2nd vs 3rd Generation". Leads Rating. http://www.leadsrating.com/smart-thermostats/smart-thermostat-comparisons/nest-2nd-vs-3rd-generation/. Retrieved July 9, 2017. 
    14. "How do I update the software on my Nest Learning Thermostat?". Support.nest.com. http://support.nest.com/article/How-do-I-update-the-software-on-my-Nest-Learning-Thermostat. Retrieved 2013-10-17. 
    15. "Nest Learning Thermostat software update history". Support.nest.com. http://support.nest.com/article/Nest-Learning-Thermostat-software-update-history. Retrieved November 4, 2012. 
    16. King, Rachel. "Nest Is Turning Up the Security on Its Thermostats". http://fortune.com/2017/03/07/nest-thermostat-security/. 
    17. "Nest Learning Thermostat open source compliance". Nest.com. https://nest.com/legal/compliance/. Retrieved August 9, 2014. 
    18. How does Nest Protect connect wirelessly? November 4, 2014. Retrieved June 15, 2015 https://nest.com/support/article/How-does-Nest-Protect-connect-wirelessly
    19. "Nest Thermostat, Nest Protect and Nest Cam support". https://nest.com/support/article/In-which-countries-are-Nest-Products-available. 
    20. "What's new in the Nest Thermostat's 4.0 software update?". Nest.com. http://support.nest.com/article/What-s-new-in-the-Nest-Thermostat-s-4-0-software-update. Retrieved 2014-06-25. 
    21. "Nest's smart Thermostat is now available to buy in the UK, priced from £179". thenextweb.com. https://thenextweb.com/gadgets/2014/04/02/nests-smart-thermostat-now-available-buy-uk-priced-179/. Retrieved 2014-04-02. 
    22. "Nest thermostat in Europe Hacks". Motote.blogspot.com.es. http://motote.blogspot.com.es/2012/09/nest-thermostat-in-europe-hacks-ii.html. Retrieved 2013-10-17. 
    23. "Direct Energy to offer Nest thermostats to new Ohio customers". bizjournals.com. http://www.bizjournals.com/columbus/blog/2014/05/direct-energy-to-offer-nest-thermostats-to-new.html?page=all. Retrieved 2014-06-25. 
    24. "Nest smart thermostat comes to nPower, cools your energy bill". cnet.com. http://www.cnet.com/uk/news/nest-smart-thermostat-now-on-npower-turns-up-the-heat-on-your-energy-bill/. Retrieved 2014-06-25. 
    25. "Nest Partners With Direct Energy to Offer Smart Home Utility Service Package". mashable.com. http://mashable.com/2014/05/15/nest-partners-with-direct-energy-to-offer-energy-saving-deal/. Retrieved 2014-06-25. 
    26. "3rd Generation Nest Learning Thermostat Introduces High-Resolution Screen, Slimmer Profile". nest.com. September 1, 2015. https://nest.com/ie/press/3rd-generation-nest-learning-thermostat-introduces-high-resolution-screen-slimmer-profile. Retrieved 2015-11-22. 
    27. "Nest Learning Thermostat, 3rd Generation". amazon.com. September 1, 2015. https://www.amazon.com/dp/B0131RG6VK. Retrieved 2015-11-22. 
    28. "Nest Learning Thermostat Troisième Génération". amazon.fr. November 16, 2015. https://www.amazon.fr/dp/B0182JP94W. Retrieved 2015-11-22. 
    29. "3rd Generation Nest Learning Thermostat Now Available in Europe". nest.com. November 17, 2015. https://nest.com/ie/press/3rd-generation-nest-learning-thermostat-now-available-in-europe. Retrieved 2015-11-22. 
    30. "Nest Learning Thermostat, 3rd Generation". amazon.co.uk. November 17, 2015. https://www.amazon.co.uk/dp/B016PW3JSG. Retrieved 2015-11-22. 
    31. https://nest.com/blog/2016/09/08/saving-energy-never-goes-out-of-style/
    32. "Nest Expands Thermostat Line to Bring Energy Savings to More Homes with Nest Thermostat E". nest.com. August 30, 2017. https://nest.com/press/nest-expands-thermostat-line-to-bring-energy-savings-to-more-homes-with-nest-thermostat-e. Retrieved 2017-09-05. 
    33. "Nest Thermostat E". amazon.com. September 1, 2017. https://www.amazon.com/Nest-A0063-Thermostat-E/dp/B074NBTCY7. Retrieved 2017-09-05. 
    34. "T200477 (Canadian) vs T200577 (US)?". community.nest.com. https://community.nest.com/message/8880. Retrieved 2013-07-15. 
    35. "T200377 vs T200677?". community.nest.com. https://community.nest.com/message/46670. Retrieved 2015-03-05. 
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