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Forum Thread Details
  • Replies 23 replies
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  • python
  • help
  • blink led
  • arduinos
  • arduino coding
  • need help coding
Related

HELP :'(

the_future
the_future over 7 years ago

Coding Arduino in Python but got an error and have no idea why please help me

 

My Code:

 

 

import serial                                 # add Serial library for Serial communication

 

 

Arduino_Serial = serial.Serial('com4',9600)  #Create Serial port object called arduinoSerialData

print Arduino_Serial.readline()               #read the serial data and print it as line

print ("Enter 1 to ON LED and 0 to OFF LED")

 

 

while 1:                                      #infinite loop

    input_data = raw_input()                  #waits until user enters data

    print "you entered", input_data           #prints the data for confirmation

  

    if (input_data == '1'):                   #if the entered data is 1

        Arduino_Serial.write('1')             #send 1 to arduino

        print ("LED ON")

     

  

    if (input_data == '0'):                   #if the entered data is 0

        Arduino_Serial.write('0')             #send 0 to arduino

        print ("LED OFF")

 

image

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Top Replies

  • Dudley
    Dudley over 7 years ago in reply to shabaz +5
    I still call () brackets. I call {} braces and [] square brackets. Parentheses to me is related to sentence structure. Something added as an afterthought in an existing sentence - something you didn't…
  • jomoenginer
    jomoenginer over 7 years ago in reply to Dudley +5
    Some refer to '{}" as curly brackets, so I suppose '()' could be something like happy-sad face brackets. I still refer to '#' as the pound symbol due to my Unix background; '#!' = Pound Bang To each is…
  • gecoz
    gecoz over 7 years ago in reply to the_future +4
    Since the "python setup.py install" seems to be working, probably your Python 2.7 environment is correctly set up. On the other hand, the error you get using the "python3 ..." command is a strong indicator…
Parents
  • shabaz
    shabaz over 7 years ago

    Hi,

     

    This is a guess (I don't know Python very well), you probably need brackets, i.e.

     

    print(Arduino_Serial.readline())

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  • the_future
    the_future over 7 years ago in reply to shabaz

    project from : https://www.electronicshub.org/controlling-arduino-led-python/

     

    thanks now I have added brackets to my code I have a new error the thing

    is that I have properly already installed the serial library using CMD

    so what I am missing?

     

     

    image

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  • the_future
    the_future over 7 years ago in reply to shabaz

    project from : https://www.electronicshub.org/controlling-arduino-led-python/

     

    thanks now I have added brackets to my code I have a new error the thing

    is that I have properly already installed the serial library using CMD

    so what I am missing?

     

     

    image

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  • jj57
    jj57 over 7 years ago in reply to the_future

    I think the problem is in your setup command.

    You probably typed:

      python setup.py install

    but since you are using python 3.x (as compared to 2.x in the example you are following) you would need to do:

      python3 setup.py install

     

    as explained here:

    https://pythonhosted.org/pyserial/pyserial.html#from-source-tar-gz-or-checkout

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  • the_future
    the_future over 7 years ago in reply to jj57

    getting the message -> 'python3' is not recognized as an internal or external command,

    operable program or batch file.

     

    but when I do -> python setup.py install the cmd does something

     

    tried to follow these steps : https://github.com/Langoor2/PokemonGo-Map-FAQ/wiki/%27python---pip%27-is-not-recognized-as-an-internal-or-external-comma…

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  • gecoz
    gecoz over 7 years ago in reply to the_future

    Since the "python setup.py install" seems to be working, probably your Python 2.7 environment is correctly set up. On the other hand, the error you get using the "python3 ..." command is a strong indicator of an improperly set up Python 3 environment. You can find more information on configuring/running Python 3 on Windows on the official Python3 documentation.

    I hope it helps.

     

    Fabio

     

    P.S: Once you configured your Python3 environment properly, I would advise to use pip to install the Python packages (like the pyserial package needed to run your script), as it makes the management of the packages a lot easier.

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  • jomoenginer
    jomoenginer over 7 years ago in reply to the_future

    I'm assuming you are running on Windows, so it would be best to check the output of 'env' to see what version of Python is set in your PATH environment variable or if you have a PYTHONPATH set.

     

    However, to switch between Python 2.7 and Python 3 on the command line in Windows 10, just type 'py -2.7' or 'py -3'.  If you just type these then you should drop into the Python command console which will show the version of python that is running.

    https://docs.python.org/3/using/windows.html

     

    From the Python command console, just type 'import serial' to see if serial has been installed for that version of Python. If you get no errors, then it is installed.

     

    To run this with a script, you would type 'py -2.7 my_script.py'.  This should run the script as a Python 2.7 script.

     

    You could add a 'env' statement at the head of the python file to see if that forces the file to run with a particular Python version.

    Ex:

    #!/usr/env python2.7

     

    The other option is to use Python Virtual Environment to configure a specific python version config for whatever version of Python you need to run.

    https://docs.python.org/3/tutorial/venv.html

     

    I hope something here helps.

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