The situation when mobile device Suddenly, the printer stops detecting the wireless network printer, which is one of the most common problems in home offices. Users often find that printing documents from their phone, which worked yesterday, is now impossible, and the list of available devices is empty. This can be frustrating, especially when you urgently need to print a ticket or contract.
The main reason lies in the violation of data exchange protocols between router and peripheral equipment. The Wi-Fi network may be unstable, IP addresses may conflict, and the smartphone's detection services may be blocked by the security system. In 90% of cases, the problem can be resolved without calling a technician by properly resetting the network settings. It is important to understand that modern Android and iOS operating systems have different printer search algorithms.
In this article, we will look at all the possible scenarios why your Canon becomes invisible to your device. We'll cover router settings, driver features, and hidden parameters that are often overlooked. Get ready for a detailed diagnostic that will restore your device's functionality.
β οΈ Important: Before starting the deep configuration, make sure that the Client Isolation feature is not enabled on your router, which physically prevents devices from seeing each other within the same network.
Basic diagnostics of network connections
The first step should always be checking the physical connection status. If the Wi-Fi indicator on the printer itself is blinking or red, the software settings on your phone won't help. Make sure both devicesβyour smartphone and the MFPβare connected to the network you think is active. Often, homes have multiple routers or repeaters with similar names (SSIDs), and devices automatically switch to weaker signals.
Check the signal frequency. Many older models Canon PIXMA or MF series operate exclusively in the range 2.4 GHzIf your phone is connected to a 5 GHz network and the router doesn't connect them into a single logical network, the devices simply won't hear each other. This is a common mistake when setting up dual-band routers.
It's also worth paying attention to the sleep mode status. Some printer models disable the Wi-Fi module when entering deep sleep to save power and don't wake up quickly enough to request discovery. Try pressing the "Start" or "Stop" button on the device to force the network module to activate before attempting to search from your phone.
Checking the compatibility of protocols and standards
Modern smartphones use technology AirPrint (for iOS) and Mopria (for Android) for automatic device detection. If your Canon printer is more than 10 years old, it may not support these standards out of the box. In this case, the phone will not be able to detect the device without the use of intermediary software.
You need to check your router's firmware version. Encryption protocols WPA2 And WPA3 sometimes conflict with older printer network cards. If the router has recently been updated, it may have switched to a stricter security standard, which the old one Canon It can't handle it. In this case, you need to temporarily enable mixed mode or compatibility mode in your router settings.
Also, pay attention to your firewall settings. Antivirus software on your phone or built-in protection in your router may block ports needed for printing data. These are typically ports 9100, 515, or 631. Blocking these ports makes the printer visible in the network list but unavailable for printing.
List of frequently blocked ports
Port 9100 (Raw Printing) is the primary port for data transfer. Port 515 (LPD) is used in Unix systems and some mobile operating systems. Port 631 (IPP) is the Internet printing protocol, critical for AirPrint. Port 5353 (mDNS/Bonjour) is responsible for discovering devices on the local network.
Configuring IP addressing and static routes
One of the main reasons why the phone stops seeing the printer after rebooting the router is a dynamic change in the IP address. Protocol DHCP Each time the device is assigned a new address, the phone app continues to search for the old one. The solution is to assign the address to the printer's MAC address.
To do this, you need to log into the router interface (usually at 192.168.0.1 or 192.168.1.1). Find the LAN or DHCP Server section. There will be a list of connected devices. Find yours. Canon by name or MAC address (found on the sticker on the back of the device) and select the "Lock" or "Static Lease" option.
After this procedure, the address will no longer change. However, if the network has already "remembered" the old, conflicting address, a full reset of the printer's network settings may be necessary. This will return it to the factory network settings and force it to request the new, already assigned address.
βοΈ Setting up a static IP
Using the official Canon PRINT app
The operating system's built-in tools don't always work correctly with Canon-specific features. Official app Canon PRINT Inkjet/SELPHY or Canon PRINT Business It has its own detection drivers that bypass some Android and iOS system limitations. If the standard search doesn't work, this app is your go-to tool.
When you first launch the app, it will ask for permission to access your local network. On iOS, this is critical: if you accidentally tap "No" when prompted to access your local network, your phone will physically block the app from scanning your Wi-Fi for printers. Check your privacy settings in the "Local Network" section.
The app has a manual registration feature. You can add a printer by IP address, even if the automatic search fails. To do this, you need to know the MFP's current IP address, which can be found by printing a network configuration report (usually by pressing the "Stop" button and holding the Wi-Fi button, or via the on-screen menu).
β οΈ Note: App and router interfaces are updated regularly. The layout of menu items may differ from those described, so please consult your router manufacturer's current documentation.
Specifics of connecting Android and iOS
The Apple and Google ecosystems use different communication mechanisms. Devices iPhone And iPad Rely on Bonjour (mDNS) technology. If your network has many Apple devices, the router may be overloaded with multicast traffic, and discovery packets are simply lost. In such cases, rebooting the router, which clears the ARP table cache, can help.
On Android, the situation is different. Here, you often need to install a plugin. Mopria Print ServiceWithout this system component, many phones simply cannot print documents, even when they recognize the device. Check your phone's settings under "Connections" -> "Print" and ensure the plugin is enabled.
It's also worth considering that some smartphone manufacturers (e.g., Xiaomi, Huawei) have aggressive power-saving systems. They may "kill" the background printer search process, considering it a drain on battery. Add the printing app to your system's exceptions or whitelist.
Table of error codes and indicators
The printer itself often reveals the cause of the problem through blinking lights or a code on the display. Interpreting these signals helps determine whether the device can see the network at all, or whether the problem is just with communication with the phone.
| Indicator / Code | Meaning | Action |
|---|---|---|
| Wi-Fi blinks (1 sec) | Network search | Check the SSID and password |
| Wi-Fi blinks (3 sec) | Connection error | Reset network settings |
| Code E03 / E05 | No paper / Tray empty | Load paper (blocks printing) |
| Orange + Green | Hardware error | Service required |
| Indicator "i" (info) | Message on the screen | Check ink status |
Radical measures: Reset and reconnect
If gentle methods don't help, the only option left is to resort to the "heavy artillery"βa complete reset of the printer's network settings. This will return the Canon network module to its factory settings. For most models, you need to hold down the button Direct (or Wi-Fi) until the power indicator flashes, then release.
After the reset, the printer will switch to access point mode (Direct Connect). Your phone will see a network with a name like "Canon-ij-XXXX." Once connected, you can use a browser or app to retransmit the connection details to the router's primary Wi-Fi network. This eliminates password errors, which often occur during initial setup.
Keep in mind that after resetting the printer itself, your phone may still "remember" the old connection. Go to your phone's Wi-Fi settings, find the printer's network (if it's there), and tap "Forget Network." This will force your smartphone to reconnect to the device as if it were new.
How to perform a full network reset on a Canon without a screen
1. Press and hold the 'Stop' button until the 'Power' indicator turns orange (about 10-15 seconds).|2. Release the 'Stop' button.|3. Press the 'Black' or 'Color' start button to confirm.|4. The printer will restart the network module.
Impact of updates and third-party software
Sometimes the problem occurs after an automatic firmware update for your router or phone's operating system. Software vendors frequently change their security policies. For example, new versions of Android may require geolocation to be enabled to search for devices on the local network, as Wi-Fi scanning is considered part of the geolocation functionality.
It's also worth checking if you have any memory cleaners or VPN services installed on your phone. An active VPN redirects all traffic through a remote server, making the local printer invisible to the system. Always disable the VPN before printing.
In rare cases, reinstalling the drivers via a PC can help. By connecting the printer to the computer via USB, you can use the utility Canon My Printer for network diagnostics and reconfiguration of the wireless module, which is sometimes more effective than configuration from the phone.
Why does the phone see the router but not the printer?
This means there's a physical internet connection, but the logical connection within the local network is broken. This is most often caused by ports being blocked by the router's firewall or devices being on different subnets (for example, a guest Wi-Fi network).
Is it possible to connect a Canon printer without a router?
Yes, most modern models support Wi-Fi Direct. In this mode, the printer creates its own network, which the phone connects to directly, bypassing the home router. Speeds may be lower, but printing will still work.
What should I do if the Canon PRINT app displays a communication error?
Try deleting the app, restarting your phone, and reinstalling it. When reinstalling, be sure to grant all requested permissions, especially network access and location access (for Android).
Does the length of the Wi-Fi password affect printer connection?
Yes, some older Canon printer models don't support WPA2/WPA3 passwords longer than 32 characters or containing special characters. If the password is very complex, try temporarily simplifying it to test it.