# 8. Group Control

## 8.1 Project Introduction

In this section, we will discuss how to control multiple MechDog robots using a mobile phone.

## 8.2 Operation Steps

[Group Control APP](resources_download.md)

[Group Control Program](../_static/source_code/Group%20Control%20Program.zip)

(1) Open the Editor: Launch the `Hiwonder Python Editor` and open the `main.py` file for group control.

<img src="../_static/media/chapter_8/image2.png" class="common_img" />

(2) Modify the Wi-Fi name and password to match your router's settings.

<img src="../_static/media/chapter_8/image3.png" class="common_img" />

(3) Download the `main.py` file to each MechDog you wish to control (each MechDog requires this file).

<img class="common_img" src="../_static/media/chapter_4/section_7/05/image17.png"  />

(4) After downloading, power off and restart the MechDog. Once it connects to the `Wi-Fi`, it will stand up.

(5) Ensure your phone and the MechDog are connected to the same `Wi-Fi` network. Open the group control app and click the refresh button to see the MechDog devices on the same network.

<img src="../_static/media/chapter_8/image5.png" class="common_img" />

<img src="../_static/media/chapter_8/image6.png" class="common_img" />

(6) Click the `Send Action Group Command` button below to select and execute the default action group; all MechDogs will perform this action simultaneously.

<img src="../_static/media/chapter_8/image7.png" class="common_img" />

<img src="../_static/media/chapter_8/image8.jpeg" class="common_img" style="width:400px;"/>

(7) To run user-edited action groups, import the action groups to each MechDog using the upper computer interface. After this, all MechDogs will be able to execute the custom action group.