4. 请问为何在电脑上可以运行，脱机运行就无法连接wifi？
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    • 请问为何在电脑上可以运行，脱机运行就无法连接wifi？

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      0_1555560507937_Screenshot_20190418_120413.jpg

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    • 如果涉及代码，需要报错提示与全部代码文本，请注意不要贴代码图片

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      # MJPEG Streaming AP.
#
# This example shows off how to do MJPEG streaming in AccessPoint mode.
# Chrome, Firefox and MJpegViewer App on Android have been tested.
# Connect to OPENMV_AP and use this URL: http://192.168.1.1:8080 to view the stream.

import sensor, image, time, network, usocket, sys

SSID ='OPENMV_AP'    # Network SSID
KEY  ='1234567890'    # Network key (must be 10 chars)
HOST = ''           # Use first available interface
PORT = 8080         # Arbitrary non-privileged port

# Reset sensor
sensor.reset()
# Set sensor settings
sensor.set_contrast(1)
sensor.set_brightness(1)
sensor.set_saturation(1)
sensor.set_gainceiling(16)
sensor.set_framesize(sensor.QVGA)
sensor.set_pixformat(sensor.GRAYSCALE)

# Init wlan module in AP mode.
wlan = network.WINC(mode=network.WINC.MODE_AP)
wlan.start_ap(SSID, key=KEY, security=wlan.WEP, channel=2)

# Load Haar Cascade
# By default this will use all stages, lower satges is faster but less accurate.
face_cascade = image.HaarCascade("frontalface", stages=25)
print(face_cascade)

# You can block waiting for client to connect
#print(wlan.wait_for_sta(10000))

def start_streaming(s):
    print ('Waiting for connections..')
    client, addr = s.accept()
    # set client socket timeout to 2s
    client.settimeout(2.0)
    print ('Connected to ' + addr[0] + ':' + str(addr[1]))

    # Read request from client
    data = client.recv(1024)
    # Should parse client request here

    # Send multipart header
    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()

    # Start streaming images
    # NOTE: Disable IDE preview to increase streaming FPS.
    while (True):
        clock.tick() # Track elapsed milliseconds between snapshots().
        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)
        #print(clock.fps())
        


        img = sensor.snapshot()


        clock.tick()
        # Find objects.
        # Note: Lower scale factor scales-down the image more and detects smaller objects.
        # Higher threshold results in a higher detection rate, with more false positives.
        objects = img.find_features(face_cascade, threshold=0.75, scale=1.35)
        #image.find_features(cascade, threshold=0.5, scale=1.5),thresholds越大，
        #匹配速度越快，错误率也会上升。scale可以缩放被匹配特征的大小。

        #在找到的目标上画框，标记出来
        # Draw objects
        for r in objects:
            img.draw_rectangle(r)

        # Print FPS.
        # Note: Actual FPS is higher, streaming the FB makes it slower.
        #print(clock.fps())
        if objects:
            middle = int((objects[0][0]+objects[0][2])/2)
            print(middle)
        else:
            print('no')




        

#clock = time.clock()

while (True):
    # Create server socket
    s = usocket.socket(usocket.AF_INET, usocket.SOCK_STREAM)
    try:
        # Bind and listen
        s.bind([HOST, PORT])
        s.listen(5)

        # Set server socket timeout
        # NOTE: Due to a WINC FW bug, the server socket must be closed and reopened if
        # the client disconnects. Use a timeout here to close and re-create the socket.
        s.settimeout(3)
        start_streaming(s)
    except OSError as e:
        s.close()
        print("socket error: ", e)
        #sys.print_exception(e)
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      这是我写的代码，而且人脸识别的识别精度比例程差了许多，请问原因？

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    • @19805185968 不同的问题单独发帖子。

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      @kidswong999 好的，但请先把WIFI无法脱机运行的的问题解决一下好吗，上面是代码

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    • 我现在在外地，等回去拿到Wi-Fi扩展板测试一下。

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    • OpenMV的wifi扩展板当作热点时，只能连接一个设备。
      你是不是既连了手机，还要连接电脑？

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      @kidswong999 并没有，电脑端并没有连接OPENMV的热点，还有就是使用5V电源直接供电OPENMV灯明显闪烁的不对，手机上也搜不到热点，我是使用充电宝供电才出现热点，但无法连接！

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