It is extremely important to calibrate the Ozobot robot every time you begin playing, when light conditions change and whenever you change your playing surface.
Ozobot’s infrared sensors (also known as its "eyes") are highly sensitive to surrounding light.
As a result, changing paper or moving closer to a window affects Ozobot’s ability to follow lines and read color codes.
Calibration orients Ozobot to the surrounding light and surface.

There are two methods to calibrate the Ozobot robot.

Calibrating Ozobot using a tablet or a smartphone digital screen
1. Set your screen brightness to 100% (maximum brightness) to ensure Ozobot’s optimal functionality.
Make sure tablets are not set to auto-dim. Remember to calibrate whenever screen brightness or external light conditions change
2. Turn on the Ozobot robot by pressing and holding the power button for 2 seconds. The Ozobot robot will blink white when ready.
3. Place the Ozobot robot on the screen against a white spot. Ozobot will begin flashing white.
4. When Ozobot blinks green, it means that it has successfully calibrated. Start over if Ozobot blinks red.

Calibrating Ozobot using a paper
1. Print a black circle on a paper the size of the robot or use a black marker to draw this circle.

2. Turn on the Ozobot robot by pressing and holding the power button for 2 seconds. The Ozobot robot will blink white when ready.
3. Place the Ozobot robot in the middle of the black circle.
4. When Ozobot moves forward and blinks green, it means that it has successfully calibrated. Start over if Ozobot blinks red.