数据接收问题，怎么办

[2nc3]

# Hello World Example
#
# Welcome to the OpenMV IDE! Click on the green run arrow button below to run the script!

import sensor, image, time, math
from machine import UART

uart = UART(2, baudrate=115200)
sensor.reset()                      # Reset and initialize the sensor.
sensor.set_pixformat(sensor.RGB565) # Set pixel format to RGB565 (or GRAYSCALE)
sensor.set_framesize(sensor.QVGA)   # Set frame size to QVGA (320x240)
sensor.skip_frames(time = 2000)     # Wait for settings take effect.
clock = time.clock()                # Create a clock object to track the FPS.
thresholds = (64, 81)

while(True):
    clock.tick()                    # Update the FPS clock.
    img = sensor.snapshot()         # Take a picture and return the image.
    uart_num = uart.any()      # 获取当前串口数据数量
    if(uart_num):
        uart_str = uart.read(uart_num).decode().strip() # 读取串口数据
        print(uart_str) 
        if(uart_str==3):
           print("lllll")
           for blob in img.find_blobs([thresholds], pixels_threshold=100, area_threshold=100, merge=True):
               # These values depend on the blob not being circular - otherwise they will be shaky.
               if blob.elongation() > 0.5:
                  img.draw_edges(blob.min_corners(), color=0)
                  img.draw_line(blob.major_axis_line(), color=0)
                  img.draw_line(blob.minor_axis_line(), color=0)
                  # These values are stable all the time.
               img.draw_rectangle(blob.rect(), color=127)
               if blob.cy()>110   and blob.cx()<200 and blob.cx()> 160 and blob.cy()<  130:
                  uart.write("t")
                  print("t")
               elif blob.cy()< 110  and blob.cx()> 160 and blob.cx() < 200:
                  uart.write("h")
                  print("q")
               elif blob.cy()> 130 and blob.cx()<200 and blob.cx()> 160:
                  uart.write("q")
                  print("h")
               elif blob.cx()<160:
                  uart.write("y")
                  print("z")
               elif blob.cx() > 200:
                  uart.write("z")
                  print("y")

等于3判定不通过
接受的是
3
3
3
3
3
3
这样的

[kidswong999]

if(uart_str==3):

改为

if(uart_str=='3'):

[2nc3]

不对
enable_lens_corr = False # turn on for straighter lines...

import sensor, image, time, pyb, math
import os, tf
from machine import UART
from pyb import LED
from struct import pack

white=LED(4)
uart = UART(2, 115200)
sensor.reset()
sensor.set_auto_gain(False) # must be turned off for color tracking
sensor.set_auto_whitebal(False) # must be turned off for color tracking
#sensor.set_auto_whitebal(False)
sensor.set_pixformat(sensor.RGB565) # 灰度更快(160x120 max on OpenMV-M7)
sensor.set_framesize(sensor.QVGA)
sensor.skip_frames(time = 2000)
clock = time.clock()
thresholds=(30, 65, -27, 47, -15, 33)
#Large_area=[76,22,210,122]
net_path = "mobilenet_v2-2022-06-29T03-44-15.608Z_in-int8_out-int8_channel_ptq.tflite" # 定义模型的路径
labels = [line.rstrip() for line in open("/sd/labels_animal_fruits_traffic.txt")] # 加载标签
net = tf.load(net_path, load_to_fb=True) # 加载模型

min_degree = 70
max_degree = 110

#点到直线距离公式
def get_point_line_distance(point, p0, p1):
point_x = point[0]
point_y = point[1]
line_s_x, line_s_y=p0
line_e_x, line_e_y=p1
#若直线与y轴平行，则距离为点的x坐标与直线上任意一点的x坐标差值的绝对值
if line_e_x - line_s_x == 0:
return math.fabs(point_x - line_s_x)
#若直线与x轴平行，则距离为点的y坐标与直线上任意一点的y坐标差值的绝对值
if line_e_y - line_s_y == 0:
return math.fabs(point_y - line_s_y)
#斜率
k = (line_e_y - line_s_y) / (line_e_x - line_s_x)
#截距
b = line_s_y - k * line_s_x
#带入公式得到距离dis
dis = math.fabs(k * point_x - point_y + b) / math.pow(k * k + 1, 0.5)
return dis
#两点长度计算
def get_point_point_distance(p0, p1):
line_s_x, line_s_y=p0
line_e_x, line_e_y=p1
line_long = math.sqrt(pow(line_s_x-line_e_x,2)+pow(line_s_y-line_e_y,2))
return line_long

while(True):
clock.tick()
img = sensor.snapshot().lens_corr(1.8)
white.on()
uart_str = uart.read(uart.any()).decode().strip()
print(uart_str)
if(uart_str=='1'):
print("a")
print("...........")

这样我仍然无法打印a

[2nc3]

打印a那是有空格的

[2nc3]

这是发送端

[2nc3]

可以收到
1
1
1
1

[kidswong999]

@2nc3 把OpenMV终端的log发一下。

[kidswong999]

先用串口调试扩展板，和星瞳串口助手测试。

https://singtown.com/learn/50240/