在 Python 中幸存的临时 COM 端口断开连接

Question

当我从 PC 上拔下 USB/Arduino 时，从中删除它的 Python 脚本崩溃。

#The connection to the Arduino
ser = serial.Serial('COM19',9600)

#Not connected to Arduino before connection is made
connected = False

#Loop until the Arduino is connected
while not connected:
    serin = ser.read()
    connected = True

#Debug Arduino connection
if connected == True:
    pprint('connected to arduino')

我尝试使用 TRY/EXCEPT 来确保连接重新连接，但是当再次插入 Arduino 时，它无法识别 COM 端口，直到计算机被重置。

from pprint import pprint
import time
import serial

while True:
    #The connection to the Arduino
    try:
        ardResponse = serial.Serial('COM19',9600)
    except IOError:
        connected = False
        pprint('Arduino not connected to COM3')
        time.sleep(10)
    continue
    serin = ser.read()
    connected = True
    pprint('Connected to Arduino')
    ser.write('1')
    while ser.read() == '1':
        ser.read()
    pprint ('Arduino has finished being flashed')

    ser.close()
    pprint('Connection closed')

    time.sleep(5)

这是因为 COM 端口保持打开状态，因此脚本无法重用它吗？有没有办法避免这个问题？

Answer 1

尝试在你的 except: 块中执行 ser.close() 然后提示用户修复它，并在再次尝试 ser.open() 之前按回车键。