Gamepad Input

Introduction: The gamepad is the driver’s control device. Your code reads sticks, triggers, and buttons each loop.

Basic theory: Joystick values are analog (-1.0 to 1.0) and button values are digital (true/false). Read inputs first, then apply logic, then send telemetry.

        import com.qualcomm.robotcore.eventloop.opmode.LinearOpMode;
        import com.qualcomm.robotcore.eventloop.opmode.TeleOp;
        
        /**
         * This OpMode demonstrates how to read basic gamepad inputs.
         * It follows the same structure as the Telemetry Demo.
         */
        @TeleOp(name="Gamepad Demo", group="Training")
        public class GamepadDemo extends LinearOpMode {
        
            @Override
            public void runOpMode() {
                // --- Initialization Phase ---
                telemetry.addData("Status", "Initialized. Press Play to start.");
                telemetry.update();
        
                // Essential: wait for the driver to press the "PLAY" button.
                waitForStart();
        
                // --- Run Phase ---
                while (opModeIsActive()) {
        
                    // Read the vertical position of the left stick.
                    double drive = -gamepad1.left_stick_y;
        
                    // Send the stick value to the Driver Hub.
                    telemetry.addData("Drive Power", "%.2f", drive);
        
                    // Check if the 'A' button is being pressed.
                    if (gamepad1.a) {
                        telemetry.addData("Button", "A Pressed");
                    }
        
                    // Essential: send the accumulated data to the Driver Hub.
                    telemetry.update();
                }
            }
        }