To set up a 123 HP printer, the recommended approach is to use the official HP setup website at **123.hp.com** or the **HP Smart app**. Here’s how to do it:

1. **Go to 123.hp.com** from a computer or mobile device. This site guides you through downloading the necessary software or app for your printer model[3].

2. **Download and install the HP Smart app** (available for Windows, macOS, Android, and iOS) to simplify the printer setup process. The app will help connect the printer to your Wi-Fi network and manage printing tasks.

3. **Follow the on-screen instructions** on 123.hp.com or within the HP Smart app to complete the setup, including connecting your printer to your local Wi-Fi network[3][5].

If you experience issues accessing 123.hp.com (e.g., site not reachable or timeouts), consider these troubleshooting steps:

– Ensure your internet connection is stable.
– Use the direct links or videos provided by HP Support Community for alternate setup guidance, such as specific YouTube tutorials for your printer model (e.g., DeskJet 2800e series or 6020e)[1][4].

– If your printer screen says to visit 123.hp.com for updates but the site is unresponsive, try updating your printer firmware through the HP Smart app instead[2].

For connecting your printer over Wi-Fi, HP’s official support documentation walks you through finding and joining your Wi-Fi network and confirming the connection for wireless printing[5].

In summary, the **best way to set up a 123 HP printer is via 123.hp.com using the HP Smart app**, but if you cannot access the site, use HP’s YouTube tutorials or community advice for manual setup instructions. Always ensure your devices are on the same Wi-Fi network to facilitate setup.