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  • 我想给Arduino发送红色色块的一个坐标信息,在Arduino那边串口监视器显示的是乱码



    • import sensor, image, time
      import json
      from pyb import UART

      For color tracking to work really well you should ideally be in a very, very,

      very, controlled enviroment where the lighting is constant...

      red_threshold = (30, 100, 15, 127, 15, 127)

      You may need to tweak the above settings for tracking green things...

      Select an area in the Framebuffer to copy the color settings.

      sensor.reset() # Initialize the camera sensor.
      sensor.set_pixformat(sensor.RGB565) # use RGB565.
      sensor.set_framesize(sensor.QQVGA) # use QQVGA for speed.分辨率为120*160。
      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, 115200)

      def find_max(blobs):
      max_size=0
      for blob in blobs:
      if blob[2]*blob[3]>max_size:
      max_blob=blob
      max_size=blob[2]*blob[3]
      return max_blob

      while(True):
      clock.tick() # Track elapsed milliseconds between snapshots().
      img = sensor.snapshot() # Take a picture and return the image.
      img.draw_cross(int(img.width()/2),int(img.height()/2))
      blobs = img.find_blobs([red_threshold])
      if blobs:
      max_blob = find_max(blobs)
      #print('sum : %d'% len(blobs))

              # Draw a rect around the blob.
        img.draw_rectangle(max_blob[0:4]) # rect
        img.draw_cross(max_blob[5], max_blob[6]) # cx, cy
      
      
      
          #{(1,22),(-3,33),(22222,0),(9999,12),(0,0)}
      
        uart.writechar((max_blob[5]))
       # print('you send:',data_out)
        print(max_blob[5], max_blob[6])
        print(img.width()/2,img.height()/2)#宽度80,高度60
      else:
        print("not found!")
      

      Arduino

      #include <SoftwareSerial.h>

      SoftwareSerial softSerial(10, 11); // RX, TX
      char c;
      String comdata = "";

      void setup() {
      // put your setup code here, to run once:
      softSerial.begin(115200);
      Serial.begin(115200);
      }

      void loop() {
      if(softSerial.available())
      {comdata += char(softSerial.read());
      delay(2);

      Serial.println(comdata);
      }
      }