D-Link DSP-W215 User Manual page 16

Section 2 - Installation
Step 9:
Once you connect, you will need to connect to your mobile device or
tablet (that you are currently running the app from) to your wireless
router (if you are not already). Make sure you keep this app running.
On your mobile device, go to Settings > Wi-Fi. Connect to your wireless
router and enter your Wi-Fi password (if you have one).
Go back to this app and tap Next to continue.
Your device will now scan your network for Smart Plugs.
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