Function quick reference

Sensor functions

Some sensors generate events when the sensors change. It is always possible to query the state of a sensor through a set of query functions.

Sensor events

• sensors_event_button_down - the button has been pressed
• sensors_event_button_up - the button has been depressed
• sensors_event_humidity - a change in humidity has been detected
• sensors_event_light - a change in light has been detected
• sensors_event_motion - motion has been detected
• sensors_event_sound - sound has been detected
• sensors_event_temperature - temperature has changed
• sensors_event_vibration - vibration has been detected

Sensor query functions

• sensors_battery() - query the battery voltage level
• sensors_button() - query the on-board button
• sensors_mic() - query the microphone
• sensors_pir() - query the passive IR sensor (motion detector)
• sensors_radiosignal() - query the radio signal strength
• sensors_temp() - query the temperature sensor
• sensors_vib() - query the vibration sensor

LED functions

• leds_on() - turn LEDs on
• leds_off() - turn LEDs off
• leds_invert() - invert LEDs
• leds_blink() - blink all LEDs

Beeper functions

• beep() - click the beeper
• beep_beep() - beep
• beep_down() - pitchbend down beep
• beep_quick() - a number of quick beeps
• beep_spinup() - pitchbend up beep

Timer functions

Contiki supports two types of timers: event timers and simple timers. Event timers generates an event when the timer expires, whereas the simple timer has to be actively queried to check when it has expired.

Event timers

• etimer_expired() - check if an event timer has expired
• etimer_set() - set an event timer
• etimer_reset() - set an expired event timer to the next interval
• etimer_restart() - restart an event timer from the current point in time

Simple timers

• timer_expired() - check if a simple timer has expired
• timer_set() - set a simple timer
• timer_reset() - set a simple event timer to the next interval
• timer_restart() - restart a simple timer from the current point in time

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