想只识别二维码一次，为什么加上i+=1，就不识别二维码了，不加就可以识别

[c62r]

import sensor, image

sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QQVGA) # can be QVGA on M7...
sensor.skip_frames(30)
sensor.set_auto_gain(False) # must turn this off to prevent image washout...
red_threshold=(30, 100, 15, 127, 15, 127)
green_threshold=(30, 100, -64, -8, -32, 32)
blue_threshold= (0, 15, 0, 40, -80, -20)
i=0
K=1040
while(True):
    img = sensor.snapshot()
    img.lens_corr(1.8) # strength of 1.8 is good for the 2.8mm lens.
    if i<2:
        for code in img.find_qrcodes():
            img.draw_rectangle(code.rect(), color = (255, 0, 0))
            message=code.payload()
            print(message)
            img.draw_string(int(code.x()+code.w()/2),int(code.y()+code.h()/2),str(message))
            if message[0]=="2":
                blobs = img.find_blobs([red_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
                    Lm = (b[2] + b[3]) / 2
                    length = K / Lm
                    print(length)
    i+=1

[tx3i]

你这个i+1写哪在

[kidswong999]

你应该在if message[0]=="2"下面添加i+=1。