Can chrome-cast be used without Wifi?

Question

To do a demo of my application to a group of persons, I need to cast my Android desktop to a TV.

Someone borrowed me a device that looks like this one (probably not exactly the same version). However, it apparently requires a Wifi network to be used to cast some content.

Is there some other chromecast devices that would not require any Wifi connection to be used?

— jpo38 | Sources

Answer

Chromecast needs some sort of connection in order to receive the media to display. Wi-Fi is the main option via a wireless router or a personal hot-spot. Google also sells an Ethernet adapter that you can plug into your wired network.

Usually Chromecast requires Internet connectivity to function, but it is possible to trick it into working on a hot-spot that lacks Internet connectivity. This work-around requires 2 Android devices for initial set-up, and the LocalCast app. The steps are described here and here.

Quote:

Gather two devices

One must be an Android cell phone with mobile capability. The second can be any device that is capable of local media

open "settings" on cell phone

open "more networks"

select "mobile hotspot"

turn on "mobile hotspot"

go into "mobile hotspot" settings by selecting the 3 vertical dots in the upper-right corner

select configure hotspot

type in a name you would like to call your mobile hotspot network or leave the default name

scroll down to choose a password for this network

Now we must switch the Wi-Fi network that the Chromecast is paired to.

ensure that the second device (the one you wish to cast from) is connected to the same network that the Chromecast is paired to (the
pairing was done when you first setup your Chromecast)

open the Chromecast app (if using iOS or Android) or open Chrome if using Linux, Windows, or MacOS

From the app choose the name of the Chromecast or from Chrome select the Chromecast icon in the upper-right of the screen, and then
choose the name of the Chromecast

Select "Wi-Fi"

Select the name of the network you are on (this will drop-down a menu with other networks)

Select the name of the mobile hotspot network you created and enter password

This will successfully switch the network that the Chromecast looks to connect to

Now we will open LocalCast app and cast the video we desire. And
lastly we will go back to the cell phone and turn off "mobile data"
and leave on "mobile hotspot"

— Chahk | Sources

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