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  • 我们只解决官方正版的OpenMV的问题(STM32),其他的分支有很多兼容问题,我们无法解决。
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  • OPENMV与arduino串口通信问题?



    • 我是想让openmv发送1给arduino的串口RX2TX2
      这是openmv代码

      # Blob Detection and uart transport
      import sensor, image, time
      from pyb import UART
      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...
      blue_threshold   = (92, 16, -31, 9, -40, -17)
      # 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.
      sensor.skip_frames(10) # Let new settings take affect.
      sensor.set_auto_whitebal(False) # turn this off.
      clock = time.clock() # Tracks FPS.
      sensor.set_hmirror(True)
      sensor.set_vflip(True)
      
      uart = UART(3, 9600)
      def find_max(blobs):
          max_size=0
          for blob in blobs:
              if blob.pixels() > max_size:
                  max_blob=blob
                  max_size = blob.pixels()
          return max_blob
      
      while(True):
          img = sensor.snapshot() # Take a picture and return the image.
      
          blobs = img.find_blobs([blue_threshold])
          if blobs:
              max_blob=find_max(blobs)
              print('sum :', len(blobs))
              img.draw_rectangle(max_blob.rect())
              img.draw_cross(max_blob.cx(), max_blob.cy())
      
              output_str="[%d]" % (1) #方式1
              #output_str=json.dumps([max_blob.cx(),max_blob.cy()]) #方式2
              print('you send:',output_str)
              uart.write(output_str+'\r\n')
          else:
              print('not found!')
      
      

      这是arduino代码

      int a;
      void setup() {
        // put your setup code here, to run once:
        Serial.begin(9600);
        Serial2.begin(9600);
      }
      
      void loop() {
        Serial2.read();
         a = Serial2.read();//读取串口接收到的值,并且存放在a中保存起来
         Serial.print(a);
         Serial.print('\n');
         
      }
      

      在openmv没有打开时是低电平-1
      0_1555506420521_39f4a659-a795-4899-b9f2-7f971eff0c75-image.png
      打开openmv时接收到的不是1而是乱码
      0_1555506486427_9da0fb45-543e-47fa-8b91-a28ef3796085-image.png
      求大佬解释一下我应该怎么做



    • OpenMV发送的是字符串

      [1]\r\n
      

      所以你的Arduino中,应该用readStringUntil('\r\n')