为什么一传输数据就会出错呀？

[hxcb]

from machine import I2C
from vl53l1x import VL53L1X
from pyb import UART
import time,pyb,sensor,json

sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QQVGA)
sensor.skip_frames(time = 2000)
uart = UART(3, 9600)
clock = time.clock()

i2c = I2C(2)
distance = VL53L1X(i2c)
led1 = pyb.LED(1)
led2 = pyb.LED(2)
led3 = pyb.LED(3)
clock = time.clock()

while True:
    time.sleep_ms(50)
    dis=distance.read()
    if 610<dis<640:
        data="0"
        data_out = json.dumps(set(data))
        uart.write(data_out +'\n')
        print('you send:',data_out)
    clock.tick()
    img = sensor.snapshot()
    for r in img.find_rects(threshold = 25000):
        img.draw_rectangle(r.rect(), color = (255, 0, 0))
        for p in r.corners(): img.draw_circle(p[0], p[1], 5, color = (0, 255, 0))
        if r.w()>r.h():
            if 470<dis<490:
  
                data="1"
                data_out = json.dumps(set(data))
                uart.write(data_out +'\n')
                print('you send:',data_out)
            elif 320<dis<355:
                data="2"
                data_out = json.dumps(set(data))
                uart.write(data_out +'\n')
                print('you send:',data_out)
        elif r.w()<r.h():
            if 470<dis<490:
                data="3"
                data_out = json.dumps(set(data))
                uart.write(data_out +'\n')
                print('you send:',data_out)
            elif 320<dis<355:
                data="4"
                data_out = json.dumps(set(data))
                uart.write(data_out +'\n')
                print('you send:',data_out)


#include <SoftwareSerial.h>
SoftwareSerial softSerial(10, 11); // RX, TX
void setup() 
{
  softSerial.begin(9600);
  Serial.begin(9600);
}
void loop() 
{
  if(softSerial.available())
 {
    String s = detectString();
     Openmv(s);
  }
}
String detectString()
{
  while(softSerial.read() != '{');
  return(softSerial.readStringUntil('}'));
}
void Openmv(String s)
{
    if(s[1]=='0')
     {
     Serial.print('0');
     Serial.print('\n');
     }
    if(s[1]=='1')
     {      
     Serial.print('1');
     Serial.print('\n');
     }
    if(s[1]=='2')
     {     
     Serial.print('2');
     Serial.print('\n');
     }
     if(s[1]=='3')
     {      
     Serial.print('3');
     Serial.print('\n');
     }
     if(s[1]=='4')
     {      
     Serial.print('4');
     Serial.print('\n');
     }
}

[hxcb]

[kidswong999]

此回复已被删除！

[kidswong999]

https://singtown.com/learn/50539/

先按照视频步骤测试测距扩展板