IOT2040, test serial communication code does not work

Hello,

I am doing a project in IOT2040.

I need to get a serial data (RS232) from a vibration sensor through X30/ X31. Before interfacing the sensor i checked the serial communication using the python codes that i have attached here. However 'HELLOWORLD' is not getting printed.. the screenshots of output are also attached. can anyone help me in how to choose the port /dev/tty**

Is there any driver needed?  I am using a serial to usb converter inorder to connect X30/X31 to host windows system.

Thank you

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Split from How to set RS485 mode.

Hello anjalirani,

you import in your python script a file names serial where can i find this?

import serial

ser = serial.Serial(port='/dev/ttyS1',

........

Sorry for the late reply

For that you have to download and install a package named pyserial

Hello anjaliran,

no roblem.

I had problems with the installing of PIP for python @ V2.1.2 like this description ==> This shows how to get pip:https://www.rs-online.com/designspark/python-and-lorawan-enabling-the-siemens-iot2020

But in the new SD version V2.1.3 is PIP  already installt and it works.

New question published by Matty2020 is split to a separate thread with the subject IOT2040 communicate with a PLC using Modbus over RS485 .

Best regards
Jen_Moderator

Now it works the serial comunication with python3 on my IOT2000 

First install pyserial via pip3

 pip3 install pyserial 

python3 read.py

import serial

ser = serial.Serial(port='/dev/ttyS3',

                baudrate = 9600,

                parity=serial.PARITY_NONE,

                stopbits=serial.STOPBITS_ONE,

                bytesize=serial.EIGHTBITS,

                timeout=1)

while 1:

    print("serial start")

    x=ser.readline()

    print (x)

python3 write.py