What Does iButton Mean?
An iButton is a device with a microchip that is encased in a durable stainless steel enclosure measuring 16 mm thick and meant to resemble a button, hence the name. It is designed to be durable and mountable anywhere so that it can be used to carry up-to-date information, even in harsh outdoor environments. It is very small and portable, and can be attached to a ring, watch, key fob or other personal items to be used as access control for devices, computers and buildings, and then carry out data logging and data management tasks.
Techopedia Explains iButton
The iButton uses its “can” housing as the communications interface with the lid being the data contact and the base (formed by the sides and bottom) acting as the ground, which are all connected to the microchip inside. Both leads are separated by a polypropylene grommet through which a perfect seal is made that prevents dust and water from getting through to the microchip.
