Add support for Levoit Superior Studio Smart 450S (LEH-S451S-WUS)

[meijieru]

Device

• Product: Levoit Superior Studio Smart 450S Evaporative Humidifier
• Model: LEH-S451S-WUS
• Region: US
• Product page: https://levoit.com/products/levoit-superior-studio-smart-evaporative-humidifier
• Amazon ASIN: B0GR9DHR8W

Current behavior

The humidifier can be added to and controlled from the VeSync mobile app. However, pyvesync does not discover it, so Home Assistant's built-in VeSync integration creates no humidifier device or entities.

Expected behavior

pyvesync should discover the Superior Studio Smart 450S and expose its supported humidifier features.

This 2026 model does not appear in the current supported-device list. I searched open and closed issues for LEH-S451S-WUS, S451S, and Superior Studio 450S and found no existing report.

I can provide redacted diagnostics or API responses if the maintainers specify what is needed.

[kevinchen220]

I am seeing the same issue with my Superior 450s Humidifier