The HP DeskJet 4120e is a popular all-in-one printer and getting it connected to your home Wi-Fi is essential for printing from your computer, phone, or tablet. The easiest and most reliable way to do this is with the HP Smart app. This guide will walk you through the process, step by step.

Step 1: Prepare Your Printer and Devices 🖨️

Before you begin, make sure your printer and the device you're using for setup (computer, smartphone, or tablet) are ready.

1. Power On: Plug in your HP DeskJet 4120e and turn it on.
2. Restore Wi-Fi Setup Mode: This is crucial for a smooth connection. On the printer's control panel, press and hold the Wireless button and the Cancel button at the same time until the power light starts blinking. Release the buttons and wait for the wireless light to begin blinking. This indicates that the printer is in setup mode and ready to be discovered.
3. Check Your Network: Ensure the device you're using (computer or smartphone) is connected to the same Wi-Fi network you want the printer to use. You should also temporarily disable any VPN connections as they can interfere with the setup.
4. Enable Bluetooth: Turn Bluetooth on your device. The HP Smart app uses this to detect your printer during the setup process.

Step 2: Install and Use the HP Smart App 📱

The HP Smart app is the most straightforward way to connect your HP printer.

1. Download the App: Visit 123.hp.com or search for "HP Smart APP" in your device's app store (Google Play Store or Apple App Store).
2. Open the App: Launch the HP Smart app and accept the terms.
3. Add a New Printer: Tap the "Add Printer" or "+" icon. The app will search for your printer, which should be in Wi-Fi setup mode.
4. Connect to Wi-Fi: When the app finds your printer, it will guide you to connect it to your Wi-Fi network. You'll need to confirm your network name (SSID) and enter the password.
5. Follow the Prompts: The HP Smart app will take care of the rest, including installing the necessary drivers and software. Follow any on-screen instructions to complete the setup.

Alternative Method: Wi-Fi Protected Setup (WPS) 🔐

If your router has a WPS button, you can also connect to the printer without the app.

1. Activate WPS on Printer: On your HP DeskJet 4120e, press and hold the Wireless button until the wireless light starts flashing.
2. Activate WPS on Router: Within two minutes, press and hold the WPS button on your router until its light starts blinking.
3. Wait for Connection: The printer and router will now attempt to connect. Once the connection is successful, the wireless light on the printer will stop flashing and remain solid blue.

Note: If the WPS method doesn't work, go back to using the HP Smart app, as it is a more reliable and guided process.