(3) Tap the blinking Bluetooth icon in the top-right corner of the main interface. On the search screen, select the device labeled "**AiNova-**". As shown below:
(4) Once connected successfully, the Bluetooth icon will remain lit and display the battery level indicator.
| **Mode** | **Function** |
| :---------: | :--------------------------------------------------------: |
| Assembly | Provides tutorials for assembling the AiNova robot. |
| Control | Enables quick control and AI vision feature demo. |
| Programming | Allows block-based programming using built-in code blocks. |
## 4.2 APP User Guide
:::{Note}
Before using the APP to control AiNova, please ensure the factory program has been downloaded. Without it, the robot cannot be controlled.
:::
### 4.2.1 Robot Control
(1) Tap the corresponding icon 
on the main screen to enter the **"AiNova Control"** interface.
(2) Function descriptions for each icon are listed below:
| **Icon** | **Function** |
| :----------------------------------------------------------: | :----------------------------------------------------------: |
| 
| Control AiNova to move forward, backward, or turn. |
| 
| When enabled, AiNova can be moved using the phone's gravity sensing. |
| 
| When enabled, AiNova will perform obstacle avoidance using the ultrasonic sensor. |
| 
| Displays the distance between the ultrasonic sensor and the object in front of it. Only works when obstacle avoidance is enabled. |
| 
| Used to adjust the threshold for obstacle avoidance. Only works when obstacle avoidance is enabled. |
| 
| Turns the RGB lights on or off. |
| 
| Use the slider to change the RGB light color on AiNova. |
| 
| Tap to connect/disconnect the Bluetooth device. Once connected, it also displays the battery level. |
### 4.2.2 Line tracking
(1) Tap the corresponding icon 
on the main screen to enter the **"Line tracking"** interface.
:::{Note}
The robot may deviate when moving in a straight line. This is due to mechanical bias and is a normal phenomenon. You can reduce the deviation by adjusting the differential speed between the left and right motors. See the document in the same directory: Solution to Not Move Straight
:::
(2) Place the AiNova robot on the line-following map and tap the icon 
on the screen to start the function.
If the result is unsatisfactory, refer to "[**Debugging and Instructional Guidance**]()" for "[**Line-Following Sensor Sensitivity Adjustment**]()."
### 4.2.3 Draw to Follow
(1) Tap the corresponding icon 
on the main screen to enter the "**Draw to Follow**" interface.
(2) Select a shape you want the robot to follow, for example, Triangle. As shown in the image below. Then tap the icon 
to run the program.
:::{Note}
The robot may deviate when moving in a straight line. This is due to mechanical bias and is a normal phenomenon. You can reduce the deviation by adjusting the differential speed between the left and right motors. See the document in the same directory: Solution to Not Move Straight
:::
### 4.2.4 Intelligent Vision
Tap the corresponding icon 
on the main screen to enter the "**Intelligent Vision**" interface.
Games and function descriptions for each icon are listed below:
| Game | Function | Note |
| Color Tracking | Run to follow the color block trained in the WonderCam. |
Keep the card in the detect range. Do not move the card too fast. |
| Tag Recognition | Recognize the provided AprilTag to run the corresponding actions. ID1：Sway left and right ID2: Spin around ID3: RGB lights blink |
Ensure good lighting. Tags must be undamaged and unfolded. |
| Road Sign Recognition | Recognize road sign cards and performs specific responses. |
Keep the card still and within the robot's vision. Refer to the example below for correct card orientation. |
