Python serial port communication using PySerial

This video is about reading data from a device (Arduino or anything else) using Serial Port communication. This video shows the way to read the data. A nodemcu was used to send the data connected to a PC.
This technique is widely used in embedded systems and IoT. This is also a part of the series where I am covering topics on IoT and Python.
Playlist URL: • Python for IoT
Github URL for code: github.com/avi...
Do share this video and share your feedback. I would really appreciate the support.
#python3 #embedded_systems #iot #nodemcu #iot #pythonlearning #coder #developer

[@edinetgrunhed6000]

simple but concise!! thank u sir

[@cd-mar]

Thank you !!! wonderful !! I can send data to my ardruino !!! You save my brain 🧠

[@exclusiveforcroma8126]

theri level ... .Easy but superbly explained .

[@gustavolimay]

Superb! Thanks man!

[@algercomalekmalki7997]

Thank you !

[@agnichatian]

is the call ser.readline() a blocking call ? if so then how to do it without blocking the rest of the application ?

[@Avirup171]

Its a blocking call. One approach simply is to check if something is available in the serial first and then read it.
Use an if statement to check ----- if (Serial.available() > 0) then continue to read else continue with other parts.

[@giovannifernandesgarciados9534]

Thank you so much!

[@craigthepony6259]

how? I literally just get a syntax error

[@Avirup171]

Can you please paste the error once?

[@yrnn23]

hello ı have some question . I want to use in virtual serial ports how can ı make

[@TECHCODETWINS]

Hello sir, i have seen so much videos on youtube and didn't find any useful video except this. i am stuck at a line and the line is
SerialException: could not open port 'COM4': PermissionError(13, 'Access is denied.', None, 5)
how to solve this problem i have tried everything but didn't get solution please help me

[@Avirup171]

Is the same com port being used by any other application?

[@aasifajawsi1928]

@@Avirup171 I have also same problem. I used COM3 port in arduino IDE only. What can I do to overcome this problem sir?

[@Avirup171]

Hi. Ideally if the same port is accessed by another application, this problem happens. Since you are facing this issue, it will be gereat if we can get on a call to resolve this issue.
Feel free to block my callender for a free quick chat.
topmate.io/avirup171

[@arifagustyawan1456]

Hello SIr. I have watched your video. I have a problem related to python serial and barcode scanner.
I have a USB Barcode Scanner and plug into my Ubuntu PC. The Scanner is work propperly, since when I used it, it will output the reuslt of barcode on every cursor i put (such as terminal, vscode, etc.) but the `received_string` variable is always empty. The script is not give any error. Do you have any idea?
```
import serial
import time
SerialObj = serial.Serial("/dev/ttyS0", 9600)
time.sleep(3)
SerialObj.timeout(3)
print("Starting")
while True:
received_string = SerialObj.readline()
print("Received: ", received_string)
SerialObj.close()
```
I want to retrieve the data using Serial with the code, so the variable `received_string` will be assign with the value of the scanner data, but I always get `Received: b''`.

[@v24blog46]

import serial
Ple help !
File "c:/Users/youtb/Downloads/vehicle counting/CCom7.py", line 1, in
import serial
ModuleNotFoundError: No module named 'serial'

[@markestz9402]

did you install a pyserial?
in terminal:pip install pyserial

[@unik8985]

Hello sir, May I ask if do you know how to fix the " Access is Denied " problem? I've been dealing with it for the past 12 hours. Thank you in advance!

[@Avirup171]

Can you make sure that the port isn’t being used anywhere else?

[@kolboy2028]

Docker plz!

[@Avirup171]

Sure. Next year will create a series on the same. Docker, Python and IoT. Thanks for the feedback.