To set up Wi-Fi connection on your Epson projector, start by accessing the projector's settings menu. Navigate to the network settings and choose the Wi-Fi option. Select your Wi-Fi network from the available list and enter the network password if prompted. Once connected, the projector will obtain an IP address automatically. You may also need to adjust additional network settings depending on your network configuration. After setup, you can wirelessly mirror your device screen or stream content to the projector. Refer to the user manual or Epson's support website for detailed instructions specific to your projector model.