QAQ终于解决了！！

买了这个rt1062，但是串口不好使，用ch340与电脑连上了，引脚和线也没连错，波特率啥的都一样。电脑上收不到数据。而且openmv自己给自己发数据也没接受到。怎么回事啊？

import sensor
import time
from machine import UART

sensor.reset()  # Reset and initialize the sensor.
sensor.set_vflip(True)
sensor.set_hmirror(True)
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.
uart = UART(1, baudrate=9600)  # 假设TX=GPIO17, RX=GPIO16

def send_data_frame(data1, data2):
    frame = bytearray()
    frame.append(0xA3)  # 表头1
    frame.append(0xB3)  # 表头2
    frame.append(data1 & 0xFF)  # 数据1（取低8位）
    frame.append(data2 & 0xFF)  # 数据2（取低8位）
    frame.append(0xC3)  # 表尾
    uart.write(frame)
    print(f"已发送数据帧: {[hex(b) for b in frame]}")
    
    

while(True):
    uart.write(b'\x66')
    time.sleepms(500)

import time
from machine import UART

uart = UART(1, baudrate=115200, bits=8, parity=None, stop=1)
while(True):
    uart.write("Hello\r\n")
    uart.flush()
    if uart.any():
        data = uart.read(timeout=1000)
        print("Received:", data)
    time.sleep(1)