python and serial. how to send a message and receive an answer

Question

I have to send ZANE:1:00004:XX_X.X_XXXX_000XX:\\r\\nvia serial communication with python.

here is my code:

import serial
ser = serial.Seria         


        

Answer 1

I believe the earlier answers didn't understand that you are using the same port for writing and reading.

I'm having the same problem and solved it using a sleep function. Basically:

import serial
from time import sleep
ser = serial.Serial('/dev/cu.usbserial-A901HOQC', timeout=1)
ser.baudrate = 57600

msg = 'ZANE:1:00004:XX_X.X_XXXX_000XX:\r\n'
ser.write(msg)
sleep(0.5)
ser.readline()

So with that sleep you are giving time to the receiver (a machine?) to send the reply. Also note that you have to add a timeout if you want to use readline.