Unfortunately, I think our OPC UA Client driver does not have a way to import a server certificate within EasyBuidler Pro.
If you select either “Anonymous” or “User name, Password”, the Weintek HMI that acts as a OPC UA Client will automatically create its client certificate before it starts to talk to the Server. A regular OPC UA Server will ask the Client to send the client certificate to itself. Once completed, you have the right to trust the client certificate by a user interface within a programming IDE or web server (usually users don’t need to manually copy the client certificate by a USB stick and transfer it into the server. Most Servers are able to pull out the client certificate via ethernet)
The OPC UA Client driver needs access to the OPC UA server certificate as well. When the Client tries to build a connection, the certificate swap must occur before the connection is made. I believe our OPC UA Client will trust the server certificate automatically if it successfully receives the server certificate via ethernet.
Perhaps you could consider Modbus TCP communication as a solution.