distanceLux.py

   1 from machine import Pin, I2C, time_pulse_us
   2 import veml7700, time
   3
   4 i2c = I2C(0, scl=Pin(1), sda=Pin(0), freq=10000) # connected on i2c0
   5
   6 veml = veml7700.VEML7700(address=0x10, i2c=i2c, it=100, gain=1/8)
   7
   8 def measure():
   9     lux_val = veml.read_lux()
  10     print(lux_val)
  11     return(lux_val)
  12
  13 SOUND_SPEED=340
  14 TRIG_PULSE_DURATION=10
  15
  16 trig_pin=Pin(3, Pin.OUT)
  17 echo_pin=Pin(2,Pin.IN)
  18
  19 def distance():
  20     trig_pin.value(0)
  21     time.sleep_us(5)
  22     trig_pin.value(1)
  23     time.sleep_us(TRIG_PULSE_DURATION)
  24     trig_pin.value(0)
  25
  26     ultransonic_duration=time_pulse_us(echo_pin,1,30000)
  27     distance_cm=SOUND_SPEED*ultransonic_duration/20000
  28     print(distance_cm)
  29     return(distance_cm)
  30
  31 while True:
  32     measure()
  33     distance()
  34