To connect your HP Envy 6400 printer to Wi-Fi, first **put the printer into Wi-Fi setup mode** by pressing and holding the Wireless button on the back of the printer for about 5 seconds until its status light starts flashing (blue or purple depending on the model)**.** This resets the wireless settings and prepares the printer to connect to a network[1][5].
Next, use the **HP Smart app** on your computer, smartphone, or tablet to complete the wireless setup. Open the app, add your printer, and follow the on-screen instructions to select your Wi-Fi network and enter the password[2][3]. This method works for Windows, macOS, Android, and iOS devices.
Alternatively, if your router supports WPS, you can press the blinking Wireless button on the printer, then press the router’s WPS button within 2 minutes to connect automatically[5].
If you need to restore defaults before connecting, hold the Wireless button as mentioned to clear previous settings[1][4].
Summary of steps:
| Step | Action |
|———————————|—————————————————————|
| 1. Enable Wi-Fi Setup Mode | Press and hold Wireless button on printer until light flashes |
| 2. Use HP Smart App | Open app, add printer, follow Wi-Fi selection and password |
| 3. (Optional) Use WPS | Press Wireless button on printer, then WPS on router |
This process reconnects your HP Envy 6400 printer to your Wi-Fi so you can print wirelessly[1][2][3][5].