> For the complete documentation index, see [llms.txt](https://angelica.gitbook.io/hacktricks/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://angelica.gitbook.io/hacktricks/todo/radio-hacking/flipper-zero/fz-ibutton.md).

# FZ - iButton

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## Intro

For more info about what is an iButton check:

{% content-ref url="/pages/Woc1ZIjcYznBGdrB4R7L" %}
[iButton](/hacktricks/todo/radio-hacking/ibutton.md)
{% endcontent-ref %}

## Design

The **blue** part of the following imageis how you would need to **put the real iButton** so the Flipper can **read it.** The **green** part is how you need to **touch the reader** with the Flipper zero to **correctly emulate an iButton**.

<figure><img src="/files/UIStnLCRs4o0aIOCXKcw" alt=""><figcaption></figcaption></figure>

## Actions

### Read

In Read Mode Flipper is waiting for the iButton key to touch and is able to digest any of three types of keys: **Dallas, Cyfral, and Metakom**. Flipper will **figure out the type of the key itself**. The name of the key protocol will be displayed on the screen above the ID number.

### Add manually

It's possible to **add manually** an iButton of type: **Dallas, Cyfral, and Metakom**

### **Emulate**

It's possible to **emulate** saved iButtons (read or manually added).

{% hint style="info" %}
If you cannot make the expected contacts of the Flipper Zero touch the reader you can **use the external GPIO:**
{% endhint %}

<figure><img src="/files/4VYPE1TZfq7MWYzW0xpB" alt=""><figcaption></figcaption></figure>

## References

* <https://blog.flipperzero.one/taming-ibutton/>

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