# UART Control
#
# This example shows how to use the serial port on your OpenMV Cam. Attach pin
# P4 to the serial input of a serial LCD screen to see "Hello World!" printed
# on the serial LCD display.

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, 19200)

while(True):
    uart.write("Hello World!\r")
    time.sleep_ms(1000)

tx接openmv rx
电脑上正确显示两个串口
openmv没有问题，其他代码正常运行