Checkmk Werk 15035: wut_webio: handling of case when state is empty

ID: 15035 Title: wut_webio: handling of case when state is empty Component: Checks & agents Level: 1 Class: Bug fix Version: 2.2.0i1 It is possible that a device occasionally returns an empty string for different reasons such as a firmware problem. Prior to this werk, this case was left unhandled. This werk resolves this issue.