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Motionsensor.py

@@ -0,0 +1,54 @@
+from machine import Pin, PWM
+import utime
+
+buzz = PWM(Pin(15))
+buzz.freq(50)
+red = Pin(13, Pin.OUT)
+trigger = Pin(3, Pin.OUT)
+echo = Pin(2, Pin.IN)
+led = Pin(25, Pin.OUT)
+global t, diff, distance
+distance = 0
+t = 0
+diff = 0
+
+def ultra():
+
+   global t, diff, distance
+   trigger.low()
+   utime.sleep_us(2)
+   trigger.high()
+   utime.sleep_us(5)
+   trigger.low()
+   while echo.value() == 0:
+       signaloff = utime.ticks_us()
+   while echo.value() == 1:
+       signalon = utime.ticks_us()
+   timepassed = signalon - signaloff
+
+   distance = (timepassed * 0.0343) / 2
+   diff = (t - distance) ** 2
+   t = distance
+   print('difference is: ',diff)
+   if distance<200:
+       if diff<30:
+           led.value(1)
+           buzz.duty_u16(0)
+           red.value(0)
+
+       else:
+           led.value(0)
+           buzz.duty_u16(5000)
+           red.value(1)
+           print('DANGER')
+           utime.sleep(0.5)
+   else:
+        led.value(1)
+        buzz.duty_u16(0)
+        red.value(0)
+
+   print("The distance from object is ",distance,"cm")
+
+while True:
+   ultra()
+   utime.sleep(1)