如果不知道怎么接的话。

用传感器扩展板插入OpenMV
https://singtown.com/product/49896/openmv-sensor-shield/

舵机引脚部分插入舵机。

DC接口插入电池

https://singtown.com/product/50219/battery-holder-4-aaa/

这样还是不行呀

from pyb import Pin, ExtInt
import sensor, image, time,pyb,micropython
micropython.alloc_emergency_exception_buf(100)

sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QVGA)
sensor.skip_frames(time = 2000)

clock = time.clock()

def callback(line):
    global ExtInt
    ExtInt.disable()
    print("line =", line)
    ExtInt.enable()
extint = pyb.ExtInt(Pin('P0'), pyb.ExtInt.IRQ_FALLING, pyb.Pin.PULL_UP, callback)
while(True):
    clock.tick()
    img = sensor.snapshot()

import sensor, image, time
import pyb
import car
from pyb import Pin, Timer，Servo
sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QQVGA)
sensor.skip_frames(10)
sensor.set_auto_whitebal(False)
clock = time.clock()
green_threshold   = (85, 42, 15, 58, 68, 31)
size_threshold = 2000
K=460
i=0

s3 = Servo(3) # P9

s3.angle(45)
time.sleep(1000)
s3.angle(-45)
time.sleep(1000)

# Untitled - By: Administrator - 周二 一月 21 2020

import sensor, image, time

sensor.reset() #初始化相机传感器。
sensor.set_pixformat(sensor.RGB565) 
sensor.set_framesize(sensor.QVGA) 
sensor.skip_frames(time = 2000) 

clock = time.clock()

while(True):
    clock.tick()
    img = sensor.snapshot()
    for A in range(0,240,1):
      for B in range(0,320,1):
        C=(img.get_pixel(A,B))
    print(clock.fps())

import time
from pyb import Servo
import sensor, image, time
from pyb import UART

#导入需要的模块
s1 = Servo(1) # P7
s2 = Servo(2) # P8
s3 = Servo(3) # P9

s3.angle(0)
time.sleep_ms(1000)
s1.angle(0)
time.sleep_ms(1000)
s2.angle(10)
time.sleep_ms(1000)
s2.angle(-10)
time.sleep_ms(1000)

点运行一直显示这个
这是输入，有什么问题吗？
import sensor, time, image, pyb, tf, os, math

from pyb import UART
from pid import PID
from pyb import Servo

import sensor, time, image


sensor.reset()

sensor.set_contrast(3)
sensor.set_gainceiling(16)
sensor.set_framesize(sensor.HQVGA)
sensor.set_pixformat(sensor.GRAYSCALE)

face_cascade = image.HaarCascade("frontalface", stages=25)
print(face_cascade)
clock = time.clock()

while (True):
    clock.tick()

    img = sensor.snapshot()
    objects = img.find_features(face_cascade, threshold=0.75, scale=1.35)


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

如题。如何在程序里用代码检测到摄像头拔掉了，返回并打印。而不是现在拔掉摄像头程序中sensor函数会报超时错误，程序就结束了。

@ztrp import sensor, image
import lcd
sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QQVGA2) # can be QVGA on M7...
sensor.skip_frames(30)
sensor.set_auto_gain(False) # must turn this off to prevent image washout...

while(True):
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_string(10,10,code.payload())
lcd.display(img)

import sensor, image, time
from pyb import Pin, Timer
sensor.reset() # Reset and initialize the sensor.
#初始化摄像头，reset()是sensor模块里面的函数

sensor.set_pixformat(sensor.GRAYSCALE) # Set pixel format to RGB565 (or GRAYSCALE)
#设置图像色彩格式，有RGB565色彩图和GRAYSCALE灰度图两种

sensor.set_framesize(sensor.QVGA) # Set frame size to QVGA (320x240)
#设置图像像素大小，sensor.QQVGA: 160x120，sensor.QQVGA2: 128x160 (一般用于LCD
#扩展板)，sensor.QVGA: 320x240，sensor.VGA: 640x480, sensor.QQCIF: 88x72，sensor.QCIF: 176x144，sensor.CIF: 352x288

sensor.skip_frames(time = 2000) # Wait for settings take effect.
clock = time.clock()

def tick(timer): # we will receive the timer object when being called
print("Timer callback")

tim = Timer(4, freq=1) # create a timer object using timer 4 - trigger at 1Hz
tim.callback(tick) # set the callback to our tick function

while (True):
clock.tick() # Update the FPS clock.
img = sensor.snapshot() # Take a picture and return the image.
#截取当前图像，存放于变量img中。注意python中的变量是动态类型，不需要声明定义，直接用即可。
#print(clock.fps())

请在这里粘贴代码