This module works on 3.3V and will plug straight into the Skyfan DC fan and will replace the tuya module. It will not work with Tuya Smart App, it is designed to connect the fan to Home Assistant with very little effort. The Ventair optional module is not required.
Skyfan DC WIFI Module
Control Module for Home Assistant control of Sky Fan DC with JST SH 1.0mm 4 pin connector for sensor module