Canon EOS 77D, Wi-Fi (Wireless Communication) Function Instruction Manual

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If a problem occurs with the camera, first refer to this Troubleshooting
Guide. If this Troubleshooting Guide does not resolve the problem,
contact the nearest Canon Service Center.

With a Wi-Fi connection established, you cannot use the camera
by connecting it to Connect Station, a computer, or another device
with an interface cable. Terminate the Wi-Fi connection before
connecting the interface cable.

When the camera is connected to Connect Station, a computer, or
another device with an interface cable, you cannot select [
5
1:
Wireless communication settings ]. Disconnect the interface
cable before changing any settings.

With a Wi-Fi connection established, operations such as shooting
and playback may not be possible.
Terminate the Wi-Fi connection, then perform the operation.

Even with a combination of the same camera and smartphone, if
you have changed the settings or selected a different setting,
reconnection may not be established even after selecting the same
SSID. In such a case, delete the camera connection settings from
the Wi-Fi settings on the smartphone and set up a connection
again.

If Camera Connect is left running while setting up a connection
again, the connection may not be established. In such a case,
restart Camera Connect.
Troubleshooting Guide
A device connected with an interface cable
cannot be used.
Cannot select [Wireless communication settings].
Operations such as shooting and playback are not
possible.
Cannot reconnect to a smartphone.