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  • 怎么给arduino传16进制的数字1,2,3,4,5,,,,



    • # Measure the distance
      #
      # This example shows off how to measure the distance through the size in imgage
      # This example in particular looks for yellow pingpong ball.
      
      import sensor, image, time
      import json
      # For color tracking to work really well you should ideally be in a very, very,
      # very, controlled enviroment where the lighting is constant...
      yellow_threshold   = (27, 61, 36, 127, -128, 127)
      # You may need to tweak the above settings for tracking green things...
      # Select an area in the Framebuffer to copy the color settings.
      from pyb import UART
      sensor.reset() # Initialize the camera sensor.
      sensor.set_pixformat(sensor.RGB565) # use RGB565.
      sensor.set_framesize(sensor.QQVGA) # use QQVGA for speed.
      sensor.skip_frames(10) # Let new settings take affect.
      sensor.set_auto_whitebal(False) # turn this off.
      clock = time.clock() # Tracks FPS.
      uart = UART(3, 9600)
      K=640#the value should be measured
      
      while(True):
          clock.tick() # Track elapsed milliseconds between snapshots().
          img = sensor.snapshot() # Take a picture and return the image.
      
          blobs = img.find_blobs([yellow_threshold])
          if len(blobs) == 1:
              # Draw a rect around the blob.
              b = blobs[0]
              img.draw_rectangle(b[0:4]) # rect
              img.draw_cross(b[5], b[6]) # cx, cy
              if 0<b[5]<160/3 and 0<b[6]<40:
                  uart.write('0x01')
                  #print(b[5],b[6])
              if b[5]<320/3 and b[6]<40:
                  uart.write('2')
                  #print(b[5],b[6])
              if 320/3<b[5]<160 and 0<b[6]<40:
                  uart.write('3')
                  #print(b[5],b[6])
              if 0<b[5]<160/3 and 40<b[6]<80:
                  uart.write('4')
                  #print(b[5],b[6])
              if 160/3<b[5]<320/3 and 40<b[6]<80:
                  uart.write('5')
                  #print(b[5],b[6])
              if 320/3<b[5]<160 and 40<b[6]<80:
                  uart.write('6')
                  #print(b[5],b[6])
              if 0<b[5]<160/3 and 80<b[6]<120:
                  uart.write('7')
                  #print(b[5],b[6])
              if 160/3<b[5]<320/3 and 80<b[6]<120:
                  uart.write('8')
                  #print(b[5],b[6])
              if 320/3<b[5]<160 and 80<b[6]<120:
                  uart.write('9')
                  #print(b[5],b[6])
          #print(clock.fps()) # Note: Your OpenMV Cam runs about half as fast while
          # connected to your computer. The FPS should increase once disconnected.
      

      怎么给arduino传16进制的数字1,2,3,4,5,,,,



    • uart.write(bytes([1]))
      uart.write(bytes([2]))
      uart.write(bytes([3]))
      uart.write(bytes([4]))
      uart.write(bytes([5]))