Collect images or sensor data in 3 minutes

This quickstart is the final part of a series. If you haven’t read through Learn Viam, driven a rover, controlled a motor, and detected people we recommend you do so before continuing.

In this guide you’ll capture and sync sensor or image data from a machine.

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Requirements

You don’t need to buy or own any hardware to complete this tutorial. If you have the following components, you can follow along on your own hardware:

  • A Linux, macOS or WSL computer which can run viam-server or an ESP32 which can run viam-micro-server.
  • A sensor or a webcam: this could be the webcam on your laptop or any other webcam you can connect to your computer.
No computer, camera, or sensor at hand?

No problem. If you don’t have a development machine or other computer that can run viam-server, use Try Viam to borrow a rover free of cost online. The rover already has viam-server installed and is configured with some components to test with, including a webcam.

Once you have borrowed a rover, go to the CONFIGURE tab of the machine, find the cameras and click on the Test panel at the bottom of each camera’s configuration panel to test the camera stream. You should have a front-facing camera and an overhead view of your rover. Now you know what the rover can perveive.

If your rover is facing a wall, find the base configuration panel and click on its Test panel. Use the controls to drive your rover to a different location.

Now that you have seen that the cameras on your Try Viam rover work, continue with Step 4.

If you have a computer that can run viam-server but no physical sensor, you can use the viam:viam-sensor:telegrafsensor model which measures computer performance metrics.

Instructions

Select a tab below to collect images from a camera or readings from a sensor:

Step 1: Create a machine

Go to the Viam app and add a new machine.

The ‘First Location’ page on the Viam app with a new machine name in the New machine field and the Add machine button next to the field highlighted.

Step 2: Install viam-server or viam-micro-server

Navigate to the CONFIGURE tab of your machine’s page in the Viam app. Follow the setup instructions that appear on your new machine’s CONFIGURE page. If you are using a microcontroller, install viam-micro-server. Otherwise, install viam-server. Wait for your device to connect to the Viam app.

The Viam app DATA page showing sensor data from an air quality sensor.

Step 3: Configure a camera

  1. From the CONFIGURE tab on your machine’s page in the Viam app, click the + icon next to your machine part and select Component. Select the camera type and add the webcam model.

  2. Click the Save button in the top right corner of the page to save your config.

  3. Click on the Test panel at the bottom of the camera configuration panel to test the camera stream. If you don’t see an image stream, configure the video_path attribute. By default your camera stream refreshes once every second. You can change the refresh frequency to Live in the dropdown menu at the top of the Test panel.

For more detailed information, including optional attribute configuration, see the webcam docs.

Step 4: Configure data capture on the camera

  1. Click the Add method button in the camera’s configuration card. When the Create data management service prompt appears, click to add the service to your machine. Leave the default settings.

  2. Scroll back up to your camera config card. In the Data capture section:

    • Click the Method dropdown and select ReadImage.

    • Set the frequency to 0.1 to capture an image every 10 seconds.

    • Set the MIME type to image/jpeg.

  3. Click the Save button in the top right corner of the page to save your config.

For more detailed information on data capture, see Configure Data Capture.

Step 5: View the captured image data

Click on the … menu of the camera component and click on View captured data. This takes you to the data tab.

View captured data option in the component menu

If you do not see images from your camera, try waiting a minute and refreshing the page to allow time for the images to be captured and then synced to the app at the interval you configured.

Step 6: Stop data capture

If this is a test project, make sure you stop data capture to avoid charges for a large amount of unwanted data.

In the Data capture section of your camera’s configuration, toggle the switch to Off.

Click the Save button in the top right corner of the page to save your config.

Step 1: Create a machine

Go to the Viam app and add a new machine.

The ‘First Location’ page on the Viam app with a new machine name in the New machine field and the Add machine button next to the field highlighted.

Step 2: Install viam-server or viam-micro-server

Navigate to the CONFIGURE tab of your machine’s page in the Viam app. Follow the setup instructions that appear on your new machine’s CONFIGURE page. If you are using a microcontroller, install viam-micro-server. Otherwise, install viam-server. Wait for your device to connect to the Viam app.

The Viam app with the setup button.

Step 3: Configure a board

Most sensors need to be wired to the pins of a SBC such as a Raspberry Pi.

If you are not using a single-board computer (SBC), move on to step 4.

If you are using a SBC, make sure you have installed viam-server on the SBC. Then add a board component to your config for your SBC.

An example board configuration in the app builder UI. The name (local), type (board) and model (pi) are shown. No other attributes are configured.

Step 4: Configure a sensor

Search the sensor models for a model of sensor that is compatible with your sensor hardware. For example, if you have a Sensirion SHT3x-DIS temperature and humidity sensor, you should use the sensirion-sht3xd model of sensor.

If you don’t have a physical sensor that can be wired to the pins of a SBC, you can use the viam:viam-sensor:telegrafsensor model which measures computer performance metrics.

Once you determine which model to use, add it to your machine’s configuration:

  1. From the CONFIGURE tab on your machine’s page in the Viam app, click the + icon next to your machine part and select Component. Select the sensor type and add your sensor model.

    The dropdown showing all sensor models.

  2. Add required attributes, such as information about how the sensor is connected to the board. You can find information on these attributes by clicking the name of your sensor model in the available models list.

  3. Click the Save button in the upper right corner of the page to save your configuration.

  4. Click on the Test panel at the bottom of the configuration panel of the sensor to confirm you are getting readings. If you don’t see the latest reading from the sensor, check that your sensor is properly wired to the board, and that the type of communication the sensor uses is enabled on the board (if applicable).

Step 5: Configure data capture on the sensor

  1. On the sensor’s configuration card, find the Data capture area and click the Add method button. When the Data management service missing alert appears, click Create data management service to add the service to your machine. Keep the default settings.

  2. Scroll back up to your sensor configuration card. In the Data capture section:

    • Click the Method dropdown and select Readings.

    • Set the frequency to 0.05 to capture a sensor reading once every 20 seconds.

  3. Click the Save button in the top right corner of the page to save your config.

For more detailed information on data capture, see Configure Data Capture.

Step 6: View the captured sensor data

Click on the … menu of the sensor component and click on View captured data. This takes you to the data tab.

View captured data option in the component menu

If you do not see data from your sensor, try waiting a minute and refreshing the page to allow time for the readings to be captured and then synced to the app at the interval you configured.

Step 7: Stop data capture

If this is a test project, make sure you stop data capture to avoid charges for a large amount of unwanted data.

In the Data capture section of your sensor’s configuration, toggle the switch to Off.

Click the Save button in the top right corner of the page to save your config.

Next steps

Now that you have captured data, you could use this data to train your own Machine Learning model with the Viam platform.

This concludes our guided path for getting to know the Viam platform.

To learn more about the Viam platform, dive into the How-to Guides which provide instructions for common tasks and workflows, check out Tutorials for projects, or learn more in the Platform Reference documentation:

How-to Guides
How-to Guides

Follow instructions for common tasks and workflows.

Tutorials

Build a machine yourself by following along with a tutorial.

Platform Reference
Platform Reference

Use Viam to configure, program, operate, manage, and collect data from your smart machines.