Parallax S2 ROBOT Startup Manual page 17

Step
2
While holding your finger on the left light sensor, press and release the
reset button.
Step
3
When you hear the beep, uncover the light sensor.
Step
4
+
Place the S2 on the paper, and move it
back and forth across the black line. If the
right sensor sees the line, the right green
LED will light up. If the left sensor sees
the line, the left green LED will light up. If
both sensors see the line, both green
LEDs light up. The LEDs will be red if no
line is detected.
extra
*
17
The S2 must be resting on
the paper to see the line.