• OpenMV VSCode 扩展发布了,在插件市场直接搜索OpenMV就可以安装
  • 如果有产品硬件故障问题,比如无法开机,论坛很难解决。可以直接找售后维修
  • 发帖子之前,请确认看过所有的视频教程,https://singtown.com/learn/ 和所有的上手教程http://book.openmv.cc/
  • 每一个新的提问,单独发一个新帖子
  • 帖子需要目的,你要做什么?
  • 如果涉及代码,需要报错提示全部代码文本,请注意不要贴代码图片
  • 必看:玩转星瞳论坛了解一下图片上传,代码格式等问题。
  • 请问一下,op和电脑连接运行时,当接受数据发生变化后,op直接和电脑断开连接是为什么?



    • # MJPEG Streaming AP.
      #
      # 这个例子展示了如何在AccessPoint模式下进行MJPEG流式传输。
      # Android上的Chrome,Firefox和MJpegViewer App已经过测试。
      # 连接到OPENMV_AP并使用此URL:http://192.168.1.1:8080查看流。
      
      import sensor, image, time, network, usocket, sys, math, ustruct
      from pyb import UART
      #from pid import PID
      
      
      uart = UART(3,115200,bits=8, parity=None, stop=1, timeout_char = 1000)
      GRAYSCALE_THRESHOLD = [(0, 64)]
      ROIS = [ # [ROI, weight]
              (0, 100, 160, 20, 0.7),
              (0, 050, 160, 20, 0.3),
              (0, 000, 160, 20, 0.4)
             ]
      weight_sum = 0
      for r in ROIS: weight_sum += r[4]
      
      SSID ='OPENMV_AP'    # Network SSID
      KEY  ='1234567890'   # wifi密码(必须为10字符)
      HOST = ''           # 使用第一个可用的端口
      PORT = 8080         # 任意非特权端口
      
      sensor.reset()
      sensor.set_contrast(1)
      sensor.set_brightness(1)
      sensor.set_saturation(1)
      sensor.set_gainceiling(16)
      sensor.set_auto_gain(False)
      sensor.set_auto_whitebal(False)
      sensor.set_framesize(sensor.QQVGA)
      sensor.set_pixformat(sensor.GRAYSCALE)
      sensor.skip_frames(time = 2000)
      #sensor.set_vflip(True)
      #sensor.set_hmirror(True)
      
      
      wlan = network.WINC(mode=network.WINC.MODE_AP)
      wlan.start_ap(SSID, key=KEY, security=wlan.WEP, channel=2)
      
      def start_streaming(s):
      
          def sending_data(data):
              global uart;
              data = ustruct.pack("<bbb",
                             x,
                             0x0d,
                             0x0a
                             )
              uart.write(data);
      
          print ('Waiting for connections..')
          client, addr = s.accept()
          # 将客户端套接字超时设置为2秒
          client.settimeout(2.0)
          print ('Connected to ' + addr[0] + ':' + str(addr[1]))
      
          # 从客户端读取请求
          data = client.recv(1024)
          # 应该在这里解析客户端请求
      
          # 发送多部分head
          client.send("HTTP/1.1 200 OK\r\n" \
                      "Server: OpenMV\r\n" \
                      "Content-Type: multipart/x-mixed-replace;boundary=openmv\r\n" \
                      "Cache-Control: no-cache\r\n" \
                      "Pragma: no-cache\r\n\r\n")
      
          # FPS clock
          clock = time.clock()
          a=0
          n=0
          # 开始流媒体图像
          #注:禁用IDE预览以增加流式FPS。
          while (True):
              if uart.any():
                  a = uart.read(1)
                  print(a[0])
      
                  if a[0]==0x00:
                      img = sensor.snapshot().binary(GRAYSCALE_THRESHOLD).invert()
                      cframe = img.compressed(quality=35)
                      header = "\r\n--openmv\r\n" \
                           "Content-Type: image/jpeg\r\n"\
                           "Content-Length:"+str(cframe.size())+"\r\n\r\n"
                      client.send(header)
                      client.send(cframe)
                      centroid_sum = 0
                      most_pixels = 5000
                      for r in ROIS:
                          blobs = img.find_blobs(GRAYSCALE_THRESHOLD, roi=r[0:4], merge=True)
                          if blobs:
                              largest_blob = 0
                              for i in range(len(blobs)):
                                  if blobs[i].pixels() > most_pixels:
                                      most_pixels = blobs[i].pixels()
                                      largest_blob = i
                              img.draw_rectangle(blobs[largest_blob].rect())
                              img.draw_cross(blobs[largest_blob].cx(),
                                             blobs[largest_blob].cy())
                              centroid_sum += blobs[largest_blob].cx() * r[4]
                      center_pos = (centroid_sum / weight_sum)
                      deflection_angle = 0
                      deflection_angle = -math.atan((center_pos-80)/60)
                      deflection_angle = math.degrees(deflection_angle)
                      x = int(deflection_angle)
                      sending_data(x)
                      print("Turn Angle: %d" % deflection_angle)
      
                  if a[0]==0x01:
                      img = sensor.snapshot()
                      #sensor.set_pixformat(sensor.RGB565)
                      
                      cframe = img.compressed(quality=35)
                      header = "\r\n--openmv\r\n" \
                           "Content-Type: image/jpeg\r\n"\
                           "Content-Length:"+str(cframe.size())+"\r\n\r\n"
                      client.send(header)
                      client.send(cframe)
                      sensor.snapshot().save("singtown%s.jpg" % (n) )
                      n +=1
                      print(n)
      
      while (True):
          # 创建服务器套接字
          s = usocket.socket(usocket.AF_INET, usocket.SOCK_STREAM)
          try:
              # Bind and listen
              s.bind([HOST, PORT])
              s.listen(5)
      
              # 设置服务器套接字超时
              # 注意:由于WINC FW bug,如果客户端断开连接,服务器套接字必须
              # 关闭并重新打开。在这里使用超时关闭并重新创建套接字。
              s.settimeout(3)
              start_streaming(s)
          except OSError as e:
              s.close()
              print("socket error: ", e)
              #sys.print_exception(e)
      
      


    • 应该是这块的问题

      while (True):
      clock.tick() # 跟踪snapshots()之间经过的毫秒数。
      frame = sensor.snapshot()

          cframe = frame.compressed(quality=35)
          header = "\r\n--openmv\r\n" \
                   "Content-Type: image/jpeg\r\n"\
                   "Content-Length:"+str(cframe.size())+"\r\n\r\n"
          client.send(header)
          client.send(cframe)
          if uart.any():
              a = uart.read(1)
              print(a[0])
              if a[0]==0x01:
                  sensor.snapshot().save("singtown%s.jpg" % (n) )
                  print(n)


    • sensor.snapshot().save("singtown%s.jpg" % (n) )
      应该是这个和wifi视频流传输部分有冲突



    • 是因为sd卡有问题