# Default control interface

The CONTROL tab provides a ready-made interface for testing and operating any configured machine. Every component and service on the machine gets a control card with relevant controls and readouts. No code required.

For a purpose-built operator interface with only the widgets you need, see [Teleop workspaces](https://docs.viam.com/monitor/teleop-workspaces/). For a fully custom app with SDK access, see [Build apps](https://docs.viam.com/build-apps/).

## Web UI

Navigate to your machine’s page in the Viam app and click the **CONTROL** tab.

Each configured component and service appears as a card. What you can do depends on the resource type:

| Resource type           | What you can do                                                       |
|------------------------|----------------------------------------------------------------------|
| Arm                    | Move joints, set joint positions, read current positions            |
| Base                   | Drive with an arrow pad, set speed with a power slider              |
| Board                  | Read and write GPIO pins, ADC/DAC values                            |
| Button                 | View button state, simulate press                                    |
| Camera                 | View live feed, capture frames                                       |
| Encoder                | Read position and ticks                                             |
| Gantry                 | Move axes, read positions                                           |
| Gripper                | Open, close, stop                                                  |
| Input controller       | View button and axis states                                         |
| Motor                  | Set power, set RPM, go to position, read position                  |
| Movement sensor        | Read position, orientation, velocity                                 |
| Power sensor           | Read voltage, current, power                                        |
| Sensor                 | Read current values                                                |
| Servo                  | Set angle, read current angle                                        |
| Switch                 | Toggle position                                                    |
| Generic component      | Send custom commands (DoCommand)                                    |
| Discovery service      | View discovery results                                              |
| ML model service       | Run inference                                                      |
| Navigation service     | View and set navigation goals                                       |
| SLAM service           | View map and pose                                                  |
| Vision service         | Run detections and classifications on camera feeds                  |
| Generic service        | Send custom commands (DoCommand)                                    |

You can switch between machine parts directly from the CONTROL tab using the part selector at the top.

## Viam mobile app

The Viam mobile app provides similar access from your phone:

- See which machines are online
- View machine details including OS, platform, network info, and IDs
- View live camera feeds
- Adjust component settings
- Switch between components
- Restart machines
- [View machine logs](https://docs.viam.com/monitor/troubleshoot/#check-logs)
- [Upload images from your phone to the cloud](https://docs.viam.com/data/capture-sync/upload-other-data/)

The mobile app is available on the [App Store](https://apps.apple.com/vn/app/viam-robotics/id6451424162) and [Google Play](https://play.google.com/store/apps/details?id=com.viam.viammobile&hl=en&gl=US).