This tool is part of the Opendnp3 project, a very complete and excellent quality open source DNP3 protocol implementation. There are many commercial tools for this purpose in the market, like ASE 2000 and Triangle Test Harness, but I will focus only on those that can be obtained free of charge and allow continued use without that typical 30-day limit of use. In this article, I present some useful tools to perform tests and simulations of some communication protocols. In these cases, you can use third-party tools to simulate client and server systems, log communications so you can better analyze the problem. When a problem occurs, there is always a question of whether the cause is on the client or the server. Often, these integrations between client and server devices are not easily obtainable. It is a regular task for those who work with automation systems, SCADA, etc., to configure the data exchanges between the devices, using communication protocols.
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