Hi all and welcome to the group!
A number of people testing wfview have found that they are unable to display the waterfall from their rig or control it from wfview. This is generally due to a setting in the menu of your Icom rig called “C-IV Transceive”.
Wfview uses this setting to auto-detect the rig model but unfortunately we have discovered that Hamlib (and likely other software) disables this setting on all Icom rigs as their software generally has problems dealing with C-IV responses that it hasn’t requested.
If you are experiencing this issue, the “fix” is simple, within the Menu of your rig, select Set/Connectors/C-IV and enable C-IV transceive. If wfview is then used to connect to your rig, it will automatically filter any other programs attempts to disable this setting via the virtual serial port/pseudo tty. You should then be able to connect and receive the waterfall and full control of your rig.
73 Phil M0VSE