如何连接到其他设备，被连接设备有4pin线插槽？

测试发现OpenMV Cam使用镜头校正来检测QR码的功能，未能识别部分二维码。不做镜头校正可以识别

QRCode Example

This example shows the power of the OpenMV Cam to detect QR Codes

using lens correction (see the qrcodes_with_lens_corr.py script for higher performance).

import sensor, image, time

sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QVGA)
sensor.skip_frames(time = 2000)
sensor.set_auto_gain(False) # must turn this off to prevent image washout...
clock = time.clock()

while(True):
clock.tick()
img = sensor.snapshot()
img.lens_corr(1.8) # strength of 1.8 is good for the 2.8mm lens.
for code in img.find_qrcodes():
img.draw_rectangle(code.rect(), color = (255, 0, 0))
print(code)
print(clock.fps())