Please help me find problem in this code:
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. Arduino send it when I apply card to RFID reader. But, it send only from first ser
Update:
I connect 3 Arduino Uno to Raspberry Pi 3 via USB. Each Arduino connect with RFID-RC522.
ls -l /dev/ttyACM*
crw-rw---- 1 root dialout 166, 0 Oct 18 19:17 /dev/ttyACM0
But Arduinos connect to /dev/ttyUSB0
/dev/ttyUSB1
/dev/ttyACM0