I need multiple PCs to connect to a single device over TCP.

[TexasAggie]

I have up to 20 computers that need to connect to a Vaisala weather device to gather a small amount of data in 10 minute intervals. The particular moment in time is random for each PC, but always on a 10 minute period as the pressure, temperature, and humidity do not change quickly enough to require more data. Anyway, I periodically get this error:

 

01:56:32 Vaisala

 

System.IO.IOException: Unable to read data from the transport connection: An established connection was aborted by the software in your host machine. ---> System.Net.Sockets.SocketException: An established connection was aborted by the software in your host machine

at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)

at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)

--- End of inner exception stack trace ---

at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)

at DEER_DAQ.Vaisala.GetBarometric()

 

Why would I get this error and how can I avoid it?

 

I also get this error from other machines:

 

07:06:32 Vaisala

 

System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host

at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)

at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)

--- End of inner exception stack trace ---

at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)

at DEER_DAQ.Vaisala.GetBarometric()

 

Why would I get this error?

 

Is there any way I can set up a broadcast so that all PCs would pick up the message or would that require the Vaisala to have that capability?

 

Thanks.

[PlausiblyDamp]

Without knowing more about the device this is going to be difficult to diagnose...

 

Does the device support multiple simultaneous connections? When a client accesses this device is is properly closing it's connection when it has completed it's work?