For openSUSE Factory TEST run the following as root:
zypper addrepo https://download.opensuse.org/repositories/system:homeautomation:home-assistant/openSUSE_Factory_TEST/system:homeautomation:home-assistant.repo
zypper refresh
zypper install wyoming-piper
For openSUSE Factory run the following as root:
zypper addrepo https://download.opensuse.org/repositories/system:homeautomation:home-assistant/openSUSE_Factory/system:homeautomation:home-assistant.repo
zypper refresh
zypper install wyoming-piper