Changes

* [https://www.maximintegrated.com/en/design/technical-documents/app-notes/5/5917.html Linux]

* [https://www.maximintegrated.com/en/design/technical-documents/app-notes/5/5917.html Linux]

== circadiaware's description from [https://circadiaware.github.io/VLiDACMel-entrainment-therapy-non24/SleepNon24VLiDACMel.html] ==

== Description & Tips ==

 

Description taken from circadiaware<ref>https://circadiaware.github.io/VLiDACMel-entrainment-therapy-non24/SleepNon24VLiDACMel.html</ref>

Wrist skin temperature sensor for circadian rhythm phase assessment: Maxim Thermocron iButton [https://www.maximintegrated.com/en/products/ibutton-one-wire/data-loggers/DS1925EVKIT.html DS1925EVKIT] (Starter kit including one [https://www.maximintegrated.com/en/products/ibutton-one-wire/data-loggers/DS1925.html DS1925L iButton] and the DS9490R and DS1402D-DR8+ connectors to retrieve the iButton's data on computers via USB as a CSV file). Cost: about ~$100. If DS1925L is unavailable, can also use DS1922L but the internal memory and battery are much shorter (4 years for DS1925L with 5min sampling rate (setup 300s in the config), 6 months for DS1922L for 2min sampling rate). The iButton does not need to be recharged, but unfortunately once it runs out of battery, it cannot be replaced (although there is [https://www.researchgate.net/publication/270579725_Replacing_the_batteries_on_ibutton_Thermochron_Hygrochron_data_loggers one academic paper which shows how to replace an iButton's battery], but this is not an official instruction, do it at your own risk, and of course the device will be much less airtight after).

Wrist skin temperature sensor for circadian rhythm phase assessment: Maxim Thermocron iButton [https://www.maximintegrated.com/en/products/ibutton-one-wire/data-loggers/DS1925EVKIT.html DS1925EVKIT] (Starter kit including one [https://www.maximintegrated.com/en/products/ibutton-one-wire/data-loggers/DS1925.html DS1925L iButton] and the DS9490R and DS1402D-DR8+ connectors to retrieve the iButton's data on computers via USB as a CSV file). Cost: about ~$100. If DS1925L is unavailable, can also use DS1922L but the internal memory and battery are much shorter (4 years for DS1925L with 5min sampling rate (setup 300s in the config), 6 months for DS1922L for 2min sampling rate). The iButton does not need to be recharged, but unfortunately once it runs out of battery, it cannot be replaced (although there is [https://www.researchgate.net/publication/270579725_Replacing_the_batteries_on_ibutton_Thermochron_Hygrochron_data_loggers one academic paper which shows how to replace an iButton's battery], but this is not an official instruction, do it at your own risk, and of course the device will be much less airtight after).

** This setup provides true 24/7 skin temperature monitoring setup, as the iButton DS1925L can last 4 years with its integrated battery (then need to buy another one or can try to manually [https://www.researchgate.net/profile/Sean_Haughian/publication/270579725_Replacing_the_batteries_on_ibutton_Thermochron_Hygrochron_data_loggers/links/54aeabbf0cf29661a3d3a42e/Replacing-the-batteries-on-ibutton-Thermochron-Hygrochron-data-loggers.pdf replace the battery] as some researchers have done).

** This setup provides true 24/7 skin temperature monitoring setup, as the iButton DS1925L can last 4 years with its integrated battery (then need to buy another one or can try to manually [https://www.researchgate.net/profile/Sean_Haughian/publication/270579725_Replacing_the_batteries_on_ibutton_Thermochron_Hygrochron_data_loggers/links/54aeabbf0cf29661a3d3a42e/Replacing-the-batteries-on-ibutton-Thermochron-Hygrochron-data-loggers.pdf replace the battery] as some researchers have done).

** Data need to be transferred to a computer every 6 months (for the DS1925L, the interval is much smaller with DS1922L, about 10 days), and the device memory (mission) needs to be reset, otherwise it will stop recording new records.

** Data need to be transferred to a computer every 6 months (for the DS1925L, the interval is much smaller with DS1922L, about 10 days), and the device memory (mission) needs to be reset, otherwise it will stop recording new records.