Modern printing technologies have long ceased to be the privilege of desktop computers, and HP DeskJet Plus 4120 is a prime example of a device designed for mobile work. The ability to send documents and photos directly from a smartphone makes this multifunctional gadget an indispensable assistant in a fast-paced lifestyle. However, initial setup of the wireless connection often raises questions for users who are new to such interfaces.
The process of integrating a printer into a home network requires attention to detail, but is not difficult if you know the steps. Wireless printing Provides access to cloud services and lets you scan documents directly to your phone's memory. In this article, we'll walk you through all the connection steps, troubleshoot common errors, and explore the intricacies of the HP Smart app.
The key to success is proper equipment preparation before starting the setup. Wi-Fi router The app must be running smoothly, and the mobile device must have internet access. Only if these basic conditions are met will synchronization proceed quickly and smoothly, allowing you to get started right away.
Preliminary preparation of equipment and network
Before moving on to the software part, you need to make sure that the device is physically ready for operation. HP DeskJet Plus 4120 The cartridges and loading tray must be installed correctly; otherwise, the self-diagnosis system may block the network setup. Make sure the printer is plugged in and within range of your router's signal.
It's important to check the status of the lights on the control panel. If the wireless icon is blinking, it means the printer is in setup mode. Static IP address The router must be accessible, and the network itself must operate at a frequency of 2.4 GHz, since many printer models do not support the 5 GHz standard during the initial configuration.
⚠️ Important: Make sure that Client Isolation is not enabled on your router, as this feature prevents devices on the same network from seeing each other, which will make it impossible for your phone to find the printer.
It's also worth preparing your smartphone in advance. It should have the app installed. HP Smart, which is the primary management tool. Without this software, fully utilizing the 4120's features, such as scanning and ink monitoring, will be difficult.
☑️ Preparing for connection
Using the HP Smart app to set up
The most reliable and functional way to establish a connection between a phone and a printer is to use the official software from the manufacturer. Application HP Smart Automatically detects the new device and guides the user through the setup wizard. This eliminates the need to manually enter complex network settings.
After launching the program, you need to click the "Add a new printer" button, usually marked with a plus symbol. The system will ask for permission to use geolocation and Bluetooth, which is critical for detection. HP DeskJet Plus 4120Without these permissions, the phone will not be able to physically "see" the printer over the air.
Once the device is found, the app will prompt you to select your home Wi-Fi network from the list. You'll need to enter your router password. The HP Smart app will automatically transfer this data to the printer via Bluetooth, after which the device will connect to the router. The process takes no more than a minute, after which the status will change to “Ready”.
- 📱 Open the app and click "Add printer".
- 🔍 Wait until the search for devices within range is complete.
- 🔑 Enter your Wi-Fi network password when the appropriate window appears.
- ✅ Confirm the completion of the setup after the success message appears.
In some cases, it may be necessary to update the firmware of the printer itself immediately after connection. Firmware (firmware) ensures compatibility with new versions of iOS and Android operating systems, so it is not recommended to ignore this step.
Setting up via Wi-Fi Direct mode
If connecting via a router is impossible or printing is required in a location where there is no access to the main network, technology comes to the rescue Wi-Fi DirectThis mode allows you to create a direct wireless connection between your smartphone and HP DeskJet Plus 4120, bypassing the router. In this case, the printer acts as an access point.
To activate the mode, press the wireless button on the printer panel or use the setup menu. The device model will appear in the list of available networks on the smartphone screen, for example, HP-DeskJet-4120-seriesConnecting to this network requires entering a PIN, which is usually found on a sticker on the back of the device or may be printed on the configuration report.
It's worth keeping in mind that when using a direct connection, your phone may temporarily lose internet access if it doesn't support the simultaneous operation of two Wi-Fi modules. Mobile Internet In this case, the network may stop working while the printer is connected. After printing is complete, you'll need to manually switch back to the main network.
How do I find out the Wi-Fi Direct password?
The default password is printed on a label next to the power button or on the back of the printer. If you've changed the settings, print a network configuration report by pressing and holding the information (i) button and the wireless button simultaneously. The current password will be listed in the Wi-Fi Direct section.
This method is especially convenient for guests or in office situations where access to the corporate network is undesirable. However, for regular use and cloud scanning, the traditional router-based approach is preferable.
Printing and scanning from iPhone and Android
After successful synchronization, document management becomes as simple as possible. Apple device owners can use the built-in technology AirPrint, which doesn't require installing additional drivers. Simply select a document, click "Share" or the printer icon, and select HP DeskJet Plus 4120 from the list.
Android users also have access to the system's printing service, but the HP Smart app offers much more. It not only lets you print but also manage scanning. Scan function Allows you to save documents directly in PDF or JPEG format to your phone's memory or send them to cloud storage.
| Function | iOS (AirPrint) | Android (HP Smart) | Peculiarities |
|---|---|---|---|
| Photo printing | Yes | Yes | Support for different paper formats |
| Scanning | Only via the app | Yes (natively) | Saving to the cloud |
| Ink monitoring | No | Yes | Exact levels in percentages |
| Copying | No | Yes (remotely) | Setting up phone copy settings |
It's important to note that the quality of printing from a phone often depends on the original file resolution. Digital processing The app can automatically improve contrast before sending images, but for professional photos, it's best to turn off automatic enhancements in the app's settings.
⚠️ Important: When scanning multi-page documents using the app, make sure that the "Feed" or "Flatbed" mode is selected, otherwise the process may be interrupted after the first page, and you will have to initiate the task again.
Troubleshooting connection issues
Even if you follow the instructions carefully, technical difficulties may arise. A common problem is when the printer doesn't see the Wi-Fi networkThis may be due to the router broadcasting a network with the same name (SSID) for both 2.4 and 5 GHz frequencies, confusing the printer. In this case, it's recommended to temporarily separate the networks in the router settings.
Another common scenario is the "Printer not found" error in the app. Restarting all components helps: turn off the router, printer, and phone, then turn them on in this order: router -> printer -> phone. DNS cache on your phone can also interfere with detection, so it's helpful to turn airplane mode on and off.
- 🔄 Restart your router and printer.
- 📶 Check if your Wi-Fi network (SSID Broadcast) is hidden.
- 🔒 Make sure you are using the correct password (case sensitive).
- 📱 Reinstall the HP Smart app if the issue persists.
If your printer shows as "Offline", check your power saving settings. Sleep mode The printer can disable the wireless module to save power. You can disable automatic Wi-Fi shutdown in the printer settings via the web interface (EWS).
Firmware update and maintenance
Keeping your device's software up to date is critical to ensuring stable operation. HP DeskJet Plus 4120 It can update automatically via the Internet, but it is better to control this process manually through the application. Security updates They close vulnerabilities, and functional patches can add support for new file formats.
The update process takes 5 to 15 minutes, during which time the printer cannot be used. Interrupting the process, such as turning off the power, may cause damage. firmware, which will require service intervention. Make sure the ink levels are sufficient, as some printers require cartridge checks after updating.
Regular maintenance also includes printhead cleaning, which can be accessed through the HP Smart app under "Printer Tools." This helps prevent banding and dry ink nozzles, which is especially important if the printer is used infrequently.
Why won't my printer connect to the 5GHz network?
The HP DeskJet Plus 4120, like many All-in-One devices, only supports the 2.4 GHz wireless standard. 5 GHz networks have a shorter range and a different signal modulation, which this printer's hardware does not support. To resolve this, ensure your router is broadcasting a 2.4 GHz network and that your phone is connected to it during setup.
Is it possible to connect a printer without the Internet?
Yes, this is possible using Wi-Fi Direct. In this mode, the printer creates its own network, which the phone connects to. However, features that require access to HP servers (such as Instant Ink or remote printing from another network) will not work. Basic printing and scanning within the same room does not require internet access.
How do I change the name of a printer on a network?
You can change the device name (Hostname) through the built-in web interface. To do this, find the printer's IP address, enter it in a browser on a computer or phone connected to the same network, and go to the "Network" tab -> "Device Name." There, you can create a unique name that will appear in the list of available printers.
What should I do if the HP Smart app doesn't see my printer?
Make sure GPS and Bluetooth are enabled on your phone. Also, check that your phone and printer are on the same subnet (you're not connected to a guest Wi-Fi network). Try temporarily disabling your phone's mobile data, leaving only Wi-Fi enabled, to prevent the system from trying to locate the device through external servers.