Hi @sjuengst welcome to Mender hub and good to see you again.
The “mender setup” subcommand is definitely newer than 1.7. I think it was added in 2.2.
But if you are integrating with Yocto and setting up the device type and server URL using standard bitbake variables then you should not need to run “mender setup”.
In @brianPTL’s post search for “Configure Mender Server URL” to see how to do that if you don’t have it setup yet.
Drew