https://forge.codesys.com/forge/talk/Engineering/thread/b72febda0f/2021-11-25T12:18:15.293000ZRecent posts to OPC UaExpert to Raspberry PI SL with hostname (error BadHostUnknown)2021-11-25T12:18:15.293000Z2021-11-25T12:18:15.293000ZDavidBohttps://forge.codesys.com/u/davidbo/https://forge.codesys.com08a6e7f3a1770afeba7fb63aabb76394c3667e9f

<div class="markdown_content"><p>Using CODESYS V3.5 SP 2 and<br/> CODESYS Control for Raspberry Pi SL version 3.5.15.30<br/> Together with a DNS/DHCP Server made with another Pi<br/> I get the following error in UaExpert when connected with a laptop.</p> <p>17:41:43.393 | Server Node | OPCUAServer@harmonia-05 | Endpoint: 'opc.tcp://harmonia-05:4840'<br/> 17:41:43.393 | Server Node | OPCUAServer@harmonia-05 | Security policy: 'http://opcfoundation.org/UA/SecurityPolicy#None'<br/> 17:41:43.393 | Server Node | OPCUAServer@harmonia-05 | ApplicationUri: 'urn:harmonia-05:3S%20-%20Smart%20Software%20Solutions%20GmbH:CODESYS%20Control%20for%20Raspberry%20Pi%20SL:OPCUA:Server'<br/> 17:41:43.393 | Server Node | OPCUAServer@harmonia-05 | Used UserTokenType: Anonymous<br/> 17:41:43.393 | Server Node | OPCUAServer@harmonia-05 | The server returned no certificate, all certificate checks will be skipped.<br/> 17:41:45.685 | Server Node | OPCUAServer@harmonia-05 | Error 'BadHostUnknown' was returned during OpenSecureChannel<br/> 17:41:45.686 | Server Node | OPCUAServer@harmonia-05 | Connection status of server 'OPCUAServer@harmonia-05' changed to 'Disconnected'.</p> <p>With another computer not a laptop I get the following<br/> 14:15:20.050 | Server Node | OPCUAServer@harmonia-05 | Connection status of server 'OPCUAServer@harmonia-05' changed to 'NewSessionCreated'.<br/> 14:15:20.051 | Server Node | OPCUAServer@harmonia-05 | Namespace table changed, mapping old to new namespace indices<br/> 14:15:20.051 | Server Node | OPCUAServer@harmonia-05 | Connection status of server 'OPCUAServer@harmonia-05' changed to 'Connected'.</p> <p>I can add that I can ping harmonia-05 and I can also in a browser see <a href="http://hamonia-05:8080/webvisu" rel="nofollow">http://hamonia-05:8080/webvisu</a></p> <p>What the heck is wrong?</p></div>