More OpMode magic

Controlling a Servo

Limited Rotation Servo

A limited rotation servo can turn from 0 degrees to a certain amount of degrees. This range of rotation is represented by [0, 1], where 0 is 0 degrees and 1 is fully rotated.

To turn a servo, use the setPosition() method.

Servo myServo = hardwareMap.get(Servo.class, "servo);

Continuous Rotation Servo

Continuous rotation servos are like motors but they are servos. If you are using them for some reason, you must access then through the hardwareMap with the CRServo class.

Servo crServo = hardwareMap.get(CRServo.class, "cr-servo");

Continuous rotation servos work like motors in the sense that they receive a power that makes them go fast, slow, or reverse. You use the setPosition() method to power a continuous rotation servo.


Telemetry allows you to send and show data on the Driver Station app. This is typically used for debugging or troubleshooting. Telemetry is used through the telemetry variable available in the OpMode class and LinearOpMode class.


To add a line of data to the telemetry log, use the addLine method.

telemetry.addLine("Hello telemetry!");


The addData method works similarly to the addLine method. However, using the addData method formats the data like this: "CAPTION: VALUE".

telemetry.addData("CAPTION", "VALUE");


When the update method is called, the telemetry log data is cleared sent to the Driver Station app and appears on the screen. If you use the update method without adding more data to the telemetry log, then the telemetry on the Driver Station app will be empty.



The gamepad is available with the gamepad1 and gamepad2 variables in the OpMode and LinearOpMode classes.

Learn more about using the gamepad.