> For the complete documentation index, see [llms.txt](https://docs.petoi.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.petoi.com/extensible-modules/back-touch-sensor/bittle-x-v2-bittle-x+arm.md).

# Bittle X V2 / Bittle X+Arm

## Installation

<figure><img src="/files/aOu6d6xu7WValmWatfDe" alt=""><figcaption></figcaption></figure>

Here is the installation video:

{% embed url="<https://youtu.be/CLfEH9qIpLc>" %}

## **Touch Area Layout**

<figure><img src="/files/PsXLQCqgoHrFMBP1QplL" alt=""><figcaption></figcaption></figure>

Once the back touch mode is enabled, you can touch the sensitive area on Bittle's back (as marked by the <mark style="color:red;">red dashed box</mark> in the figure below), and Bittle will perform a corresponding feedback action.

Bittle X V2 Touch Areas & Responses：

* Left Area: Lightly touch to make the robot turn its head to the left and look back.
* Right Area: Lightly touch to make the robot turn its head to the right and look back.
* Center Area: Lightly touch to wake up the robot or trigger the skill Stretch .
* Touch near the tail to trigger the skill Butt up.

Bittle X+Arm Touch Areas & Responses：

* Left Area: Lightly touch to make the robot extend its robotic arm towards the front left.
* Right Area: Lightly touch to make the robot extend its robotic arm towards the front right.
* Center Area: Lightly touch to make the robot retract its robotic arm to the central position.
* Touch near the tail to make the robot extend its robotic arm straight forward and grasp an object.


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