C# - Graphing Sensor Data

In this project, you will learn how to graph your sensor data using C# and Visual Studio.


  • This project assumes you have a basic understanding of GUIs with C# and Visual Studio. If you do not, we recommend reviewing a tutorial from Microsoft such as Create a Windows Forms app in Visual Studio with C# or numerous video tutorials online.
  • This project assumes you have completed the Getting Started Kit Advanced Lessons on events.


All you need for this project is the Getting Started Kit.

Getting Started Kit

Create Project

Step 1

​Open Visual Studio and create a new Windows Form App (.NET Framework).

Step 2

Name the project Plotter and place it in the location of your choice

Step 3

Right-click on your project and select Manage NuGet Packages…

Step 4

Click on the Browse button in the top left corner and enter Phidget22 in the search bar. Click on the package and install the latest version.

Step 5

Drag a Chart object onto your form.

Step 6

Generate the Form Load event by double-clicking on your form.

Step 7

Rewrite the code below into your Form1.cs file. Hover over the comments below for more information about specific sections of the code.

using System;
using System.Drawing;
using System.Windows.Forms;
using Phidget22;

namespace Plotter
    public partial class Form1 : Form
        //Define | Define object here so it can be used throughout program
        TemperatureSensor temperature;

        public Form1()

        private void Form1_Load(object sender, EventArgs e)
            //Configure chart
            chart1.Series.Clear(); //remove default series
            chart1.Series.Add("Temperature"); //add series called Temperature
            chart1.Series.FindByName("Temperature").ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Line; //Change chart type to line
            chart1.Series.FindByName("Temperature").Color = Color.Red; //Change series color to red

            temperature = new TemperatureSensor();

            //Add event
            temperature.TemperatureChange += Temperature_TemperatureChange;

            //Open | Use open without a timeout value because GUIs are event driven and we do not want to wait on main thread.

        private void Temperature_TemperatureChange(object sender, Phidget22.Events.TemperatureSensorTemperatureChangeEventArgs e)
            //Add data point to series

Run Your Code

Try warming up your Humidity Phidget by holding it in your hands. You will see the graph value increase.


  1. Create a label on your form that displays the current temperature.
  2. Try adding a new series that displays the humidity on a line graph. Create a label on your form that displays the current humidity.
  3. Try adding functionality to your graph. For example, you could add a button that resets the graph or a slider that modifies the data interval of the Humidity Phidget.

What are Phidgets?

Phidgets are programmable USB sensors. Simply plug in your sensor, write code in your favorite language and go!

Phidgets have been used by STEM professionals for over 20 years and are now available to students.

Learn more

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