Take a look at the following steps to perform a successful Canon TS3722 wireless (WiFi) setup:
Press the power button on your printer.
Open your browser and search for the official Canon support site.
Now, type the name of your printer model and click on the search icon.
You will be redirected to the PIXMA TS3722 support page, then scroll down to the Software & Drivers section.
Look for the Master Setup file and click “Download.”
Once the file is downloaded, open it.
Choose your preferred language and click OK.
After that, click on Start Setup.
Wait for a moment.
Click the “Yes” option on the license agreement window.
Review the service information and click the “Agree” option.
Wait for the processing to complete.
Click on Next, as you’ve already powered on the printer.
Wait for a moment and let the software search for the printer.
In the Start Printer Connection window, select “Wi-Fi Connection” and click “Next.”
Click on the radio button next to Yes.
You will get an instruction message to press and hold the Wireless Connect button for three seconds.
Go to your printer’s operational panel, and press and hold the Wireless Connect button for three seconds.
Once you have completed this step, a “Connect the printer to the following Wi-Fi” window will appear on your desktop.
Verify your printer and wireless router info and press the Connect button.
Wait for the printer to connect to the network.
Let the latest software and driver to download & install.
Once connection settings and installation are complete, test a print or click Next.
If you’ve clicked “Next,” go to the website to close the software.
Source:- Canon TS3722 Wireless (WiFi) Setup