Sensors are grouped in the sensors group
and all hardware devices (sensors + motors + battery
+ beeper) are grouped in
the hardware group.
The switch device in front of the robot is
called bumper. Its value is 1 if it is pressed, 0
otherwise.
The ultrasonic sensor is called sonar.
Its value is the distance measured by the sensor in centimeters between 0 and 255. When the read operation fails, 255 is returned.
The sound sensor is called decibel.
Its value relates the level of ambient sound. It is between 0 and 1.
Two different modes can be used by changing
the .mode attribute
to "DB" or "DBA".
"DBA" is a mode measuring only frequencies between 200 and 14000Hz.
"DB" measures a wider band.
Default value is "DBA".
The light sensor is called light.
The value returned is between 0 an 1 representing the amount of light measured.
Three different modes are available by changing the .mode attribute.
"Reflector" means the sensor lights on its led and measures the light reflected.
"Ambiant" lights off the led and measures the ambiant light.
"Normal" lights off the led too and return the raw value measured.
Default value is "Reflector".