An automated smart irrigation system uses the subroutines shown in Figure 1 to process sensor readings.

Figure 1

SUBROUTINE needsWatering(moistureLevel)
  IF moistureLevel < 35 THEN
    RETURN True
  ELSE
    RETURN False
  ENDIF
ENDSUBROUTINE

SUBROUTINE calculateDeficit(moistureLevel, temperature)
  adjusted ← moistureLevel - (temperature * 0.15)
  IF adjusted < 0 THEN
    adjusted ← 0
  ENDIF
  RETURN adjusted
ENDSUBROUTINE

SUBROUTINE monitorSensor(moistureLevel, temperature)
  currentLevel ← calculateDeficit(moistureLevel, temperature)
  OUTPUT currentLevel
  IF needsWatering(currentLevel) = True THEN
    OUTPUT "Activate irrigation"
  ELSE
    OUTPUT "Irrigation idle"
  ENDIF
ENDSUBROUTINE