[gpascii exit conditions]

I am starting gpascii remotely, and under certain conditions it starts and then immediately exits. Other than sending the excape key, what other terminal commands can cause gpascii to exit? I may be inadvertently adding something to the stdin when I send the remote command to start it.

[Starting gpascii programmatically via SSH]

Correctio, I just receive the following 2 lines, and clearly gpascii is exiting as soon as it starts:

 

'STDIN Open for ASCII Input\n'

 

'// *** exit \n'

[Starting gpascii programmatically via SSH]

These are the 5 lines of output I read after sending the gpascii command:

 

'STDIN Open for ASCII Input\n'

 

'0\n'

 

'\x06\n'

 

'// *** exit \n'

 

'UnlinkGatherThread: \r\n'

[Starting gpascii programmatically via SSH]

I have gotten a bit further. I have determined that the gpascii command is getting to the controller, and that my code was hanging reading the output from stdout after transmitting the gpascii command. I have corrected that issue, but I now can see that gpascii is exiting as soon as it starts up, and I am not sure why.

 

Any suggestions?

 

I have ordered the PPMAC Dev Kit so that I can play around with the .NET examples.

[Starting gpascii programmatically via SSH]

I have a new PPMAC EtherLite that I can connect to with the IDE no issues. For my application, I need to connect programmatically from a Python application over either Telnet or SSH. I have Telnet working, but have hit a snag with SSH.

 

I can connect to the controller via either Telnet or SSH using PuTTY. I can log in, execute "ls" and other Linux commands, and I can finally start "gpascii" and talk to the controller.

 

I can also perform all of these operations programmatically from a Python application using the Python telnetlib module. No problems there.

 

When I try to connect from a Python application using the most common SSH library, paramiko, I am able to log in, execute "ls" and other Linux commands, but it hangs when I try to execute "gpascii". The command is sent but there is no reply, and it hangs when I try to read the output buffer. If I garble the "gpascii" string to say "gPascii", I get an error response such as:

 

['bash: gPascii: command not found\n']

 

I am about ready to give up on SSH, but that could pose problems for us if the PPMAC is later put on the external network. Any suggestions? Trying another development tool, C#/.NET or Java may be an option.