Variable and Sensing Values Monitoring in VEXcode 123

Variable and sensor monitoring available in the VEXcode 123 Monitor Console provides important visual cues that allow the user to see what is happening in a VEXcode 123 project in real time. The Monitor Console allows users to make a visual connection between the project and the actions of the 123 Robot. Monitoring sensor and variable values in the Monitor Console allows the user to view real-time reports of a specific value (or multiple values) in a project.

The following article will cover:


How to Use the Monitor Console

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To open the Monitor Window and view the Monitor Console, select the Monitor icon next to the Help.

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The Monitor Console reports Sensor and Variable values.

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Blocks from the Sensing category in the Toolbox can be added and removed from the Monitor Console by selecting and deselecting the corresponding check box.

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Variables can be added and removed from the Monitor Console by selecting and deselecting the corresponding box. VEXcode123 contains the ‘myVariable’ variable by default in the Toolbox. For information about adding a new variable and variable naming in VEXcode 123, view this article from the Knowledge Base here.

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Lists can also be added to the Monitor Console. Before being added to the Monitor Console, lists and 2D lists must be created. This can be done by selecting ‘Make a List’ or ‘Make a 2D List’ from the Toolbox.

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To add an existing list or 2D list, select the ‘Add Lists’ button.

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Existing lists can be added and removed from the Monitor Console by selecting the corresponding check box.

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The selected list will then appear in the Monitor Console.

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To remove a list from the Monitor Console, select the ‘Add Lists’ button again and uncheck the list you want to remove.


Monitoring Sensor Values

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Monitoring sensor values in the Monitor Console allows the user to view sensor data in real-time.

In the following example, the <Detects color> block is being monitored in the Monitor Console. The project directs the 123 Robot to drive until it detects an object. Once it detects an object, if that object is blue, the 123 Robot will turn right. If the 123 Robot does not detect blue, it will turn left. Watch as the value of the <Detects color> block in the Monitor Console changes from false to true when your 123 Robot detects the color blue.

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The Monitor Console can also be used to help the user visualize the flow of the project by showing blocks that may not be explicitly reported, such as the timer value in seconds.

In the following example, the (Timer value) block is being reported in the Monitor Console. The 123 Robot will drive forward for 1 step, and then wait until the (Timer value) block reports back a value greater than 5 seconds. The 123 Robot will then turn right 90 degrees. Without the Monitor Console, the user would be unable to visualize the exact timing of the 123 Robot turning right 90 degrees.


Monitoring Variable Values

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The Monitor Console can also be used to monitor variable values. The Monitor Console can provide real-time reports of a specific variable in a project.

In the following example, the ‘repeat’ variable is used to monitor the number of times the 123 Robot repeats a certain behavior. The variable monitoring on the Monitor Console can help to provide real-time feedback to understand the flow of the project.