Flipper Zero has a built-in 1-Wire pad to read iButton (DS1990A) keys, also known as TouchMemory or Dallas keys. This technology is quite old but still widely used around the world. It's based on 1-Wire protocol and doesn't have any authentication, so Flipper can easily read these keys, save IDs into the memory, write IDs to blank keys, and emulate the key itself. * **Reading & Writing & Emulating** * **Protocol detection**: юзер может определить тип ключа поднося ключ к флипперу и тип считывателя поднося флиппер к домофону (цифрал, даллас и т.д.)  ## Reading `iButton(1-Wire) -> Reading` Flipper will wait for iButton tag. While waiting red LED is blinking. Lean tag on iButton reader in the back side of Flipper Zero: **Video demo** [](https://www.youtube.com/watch?v=QE7Nb5r5m_Q)   # UI ## Main menu * Read * Saved Keys * Enter manually