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Connecting to a remote server using Telnet

The example shows a process of creating a driver in iRidium Studio on the basis of AV & Custom Systems (TCP) driver.

documentation was last updated on 14.8.2023

Download:

• project example

To process the received data and/or control the equipment, you can use the AV_Custom_Systems_(TCP,_UDP,_RS232) driver. To implement it, you need the Iridium Studio installed on your PC and any Telnet server. In the example we will connect to the HK-Telnet server.

Create a user in HK-Telnet:

1 Launch HK-Telnet Server

2 Select the “Create User” option

3 Specify a username and password for the user

Connecting with the “Command Line” tool:

1 Launch the “Command Line” app

2 Enter the “telnet” command

3 Enter the “open” command and the IP address of the remote server you want to connect to

4 Specify a username and password of the created user

After a successful connection, it is possible to run commands from the terminal

Work in iRidium Studio:

1 Launch the iRidium Studio and create the AV & Custom Systems (TCP) project driver. In the properties of the driver set the Host - IP address of the server, Port - 23 to which you will perform authorization and send commands from the i3 pro app.

2 To perform authorization use JS methods with the Script Editor tool built into iRidium Studio. Create a new script in Studio and paste this code, in the ‘login’ and ‘password’ items specify the data of the user you created in the Telnet Server:

IR.AddListener(IR.EVENT_RECEIVE_TEXT, IR.GetDevice('AV_Device'), function(text)
{
  IR.Log("text = " + text);
 
  if (text.indexOf('Username') != -1)
  {
    IR.Log("login")
    IR.GetDevice('AV_Device').Send(['login',13,10]);
  } else if (text.indexOf('Password') != -1)
  {
    IR.Log("password")
    IR.GetDevice('AV_Device').Send(['password',13,10]);
  }
})

3 After entering all the input data, launch the project and test its functionality. If the data is correct, the logs will display a message indicating the user login (USERNAME = TestUser) and confirmation of the connection “Welcome to Hadi Kiamarsi TELNET Server” and the IP address.

Sending commands to the server from the i3 pro app:

1 Create 2 Button elements to send commands to the server. In this example, the commands “ping” and “tree” (viewing a list of all folders in the current directory) are considered.

2 Create a function for each button with the “Send” method of command execution

function ping(){
  IR.GetDevice('AV_Device').Send(['ping iridi.com',13,10]);        
};
 
function tree(){
  IR.GetDevice('AV_Device').Send(['tree',13,10]);
}

3 As a result of running the commands in the i3 pro logs you get the following data