看的是教程视频，用的是里面的代码，还以为是板子没插好，然后用了万用表测了确实是接通了的
import time
from pyb import UART
# Always pass UART 3 for the UART number for your OpenMV Cam.
# The second argument is the UART baud rate. For a more advanced UART control
# example see the BLE-Shield driver.
uart = UART(3, 9600, timeout_char=1000)
while(True):
#uart.write("Hello World!\r\n")
#time.sleep(1000)
if uart.any():
a = uart.readline()
print(a)
你好，如果数码管的频率改不了，针对openmv有什么方法或者思路吗？
想识别一个红色的物体，识别到输出1，没有识别到输出0，但是我再运行时，总是输出1，即便没有看到红色的物体，下面是我的代码：
import sensor, image, time, math,pyb
sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QVGA)
sensor.skip_frames(time = 2000)
sensor.set_auto_gain(False) # must be turned off for color tracking
sensor.set_auto_whitebal(False) # must be turned off for color tracking
clock = time.clock()
thresholds = [(30, 100, 15, 127, 15, 127), # generic_red_thresholds
(30, 100, -64, -8, -32, 32), # generic_green_thresholds
(0, 30, 0, 64, -128, 0)] # generic_blue_thresholds
while(True):
clock.tick()
img = sensor.snapshot()
blobs = img.find_blobs([thresholds[0]], pixels_threshold=50, area_threshold=100, merge=True)
for blob in blobs:
img.draw_rectangle(blob.rect())
img.draw_cross(blob.cx(), blob.cy())
if blob :
print(1)
else:
print(0)
希望高人指点指点
for tag in img.find_apriltags(fx=f_x, fy=f_y, cx=c_x, cy=c_y): # 默认为 TAG36H11
#print(tag.id())
img.draw_rectangle(tag.rect(), color = (255, 0, 0))
img.draw_cross(tag.cx(), tag.cy(), color = (0, 255, 0))
print_args = (tag.id(), tag.x_translation(), tag.y_translation(), tag.z_translation(), \
degrees(tag.x_rotation()), degrees(tag.y_rotation()), degrees(tag.z_rotation()))
print("ID: %f, Tx: %f, Ty: %f, Tz: %f, Rx: %f, Ry: %f, Rz: %f" % print_args)
像这段代码，如果openmv识别到几个apriltag标志的话，它会出现下面这种情况(只粘贴了两行)，把这几个apriltag标志的ID打印出来了，想问一下怎么提取出ID等于15的那个标志呢？
.....
ID: 15.000000, Tx: -0.464612, Ty: -2.518064, Tz: -17.411228, Rx: 187.194242, Ry: 43.478470, Rz: 358.177352
ID: 14.000000, Tx: -3.247705, Ty: -1.681922, Tz: -15.471701, Rx: 152.212372, Ry: 328.892517, Rz: 3.846272
......