Forum Discussion

rlent's avatar
rlent
Contributor
8 years ago

Serial port communication

We do some testing involving serial communications with a device. Right now, we are using Tera Term to communicate. I'd like to bypass the terminal program entirely and just have TestComplete send st...
jonan's avatar
jonan
Occasional Contributor

Hi,

 

I am trying to send data to a COM port and found the following solution in TestComplete website

https://support.smartbear.com/testcomplete/docs/scripting/working-with/com-ports.html

 

I used the following solution as described in the web page (Python). However, when I run my test

it gave an error Permission denied. Any idea on how to solve this error?

 

def TestCOMPort():
  ForWriting = 2;
  TriStateFalse = 0;
  
  fso = Sys.OleObject['Scripting.FileSystemObject']
  f = fso.OpenTextFile("COM1:", ForWriting, False, TriStateFalse)
  # Write data to the port
  f.Write("A")
  f.Write(" ")
  f.Write("\x1B")
  f.Close()

 

  • jonan's avatar
    jonan
    Occasional Contributor
    7 years ago

    Hi Alex,

     

    The error was permission denied.

     

    Anyways, I solved this problem by just issuing a command on window cmd line to write character to a certain port by defining the following in my scripts.

     

    def connectDevice():

    cmd = "echo d > COM7"
    os.system(cmd)
    # Delay 10s
    Delay(10000)

    return

     

    Thanks for the reply.