[英]Python serial data read
Please help me find problem in this code:请帮我找到这段代码中的问题:
import serial
ser=serial.Serial("/dev/ttyACM0",9600)
ser.baudrate=9600
ser1=serial.Serial("/dev/ttyUSB0",9600)
ser1.baudrate=9600
ser2=serial.Serial("/dev/ttyUSB1",9600)
ser2.baudrate=9600
while True:
read_ser=ser.readline()
read_ser1=ser1.readline()
read_ser1=ser2.readline()
print(read_ser)
print(read_ser1)
print(read_ser2)
I expect that it will show me message from connected Arduino.我希望它会显示来自连接的 Arduino 的消息。 Arduino send it when I apply card to RFID reader.
当我将卡应用到 RFID 阅读器时,Arduino 会发送它。 But, it send only from first ser
但是,它只从第一个服务器发送
This code works as I expected这段代码按我的预期工作
import serial
ser=serial.Serial("/dev/ttyACM0",9600,timeout=1)
ser.baudrate=9600
ser1=serial.Serial("/dev/ttyUSB0",9600,timeout=1)
ser1.baudrate=9600
ser2=serial.Serial("/dev/ttyUSB1",9600,timeout=1)
ser2.baudrate=9600
while True: # Run forever
read_ser=ser.readline()
if (read_ser != ""):
print(read_ser)
read_ser1=ser1.readline()
if (read_ser1 != ""):
print(read_ser1)
read_ser2=ser2.readline()
if (read_ser2 != ""):
print(read_ser2)
Thank you @jasonharper谢谢@jasonharper
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