为什么串口接受的数据始终是一个一个的字符？

[xbaw]

# 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, timeout_char=1000)

while(True):
    if uart.any():
        a = uart.readline().decode().strip()     
        print(a)

[kidswong999]

串口助手最后加上\r\n