The app will then automatically find your Chromecast and ask you to connect it to the same Wi-Fi connection that is connected to your cell phone and the rest is a cakewalk. The process involves plugging your Chromecast into your television’s HDMI port and a power source and installing the Google Home mobile app on your smartphone. However, GNirehtet does not support ICMP/ping, and this presumably caused the Chromecast to believe it was not connected to the internet, even though it was.Setting up Chromecast is simple. I tried doing the reverse of this article, connecting to the protected network using the laptop, using GNirehtet over USB to reverse tether the smartphone to the laptop connection, and using the smartphone to create a WiFi hotspot for the Chromecast. While the setup worked correctly, the Home app on the smartphone was not then able to see the Chromecast on the same network, even though other apps worked correctly. I was not able to have the smartphone and Chromecast connect to a WiFi hotspot created from another computer (with an Ethernet connection). You should now be able to cast media to the Chromecast from your smartphone as usual. Once the Chromecast detects this, it should proceed to the ‘Almost done!’ screen, and you should be able to continue setting up your Chromecast in the Home app. To solve this, simply return to the smartphone and reconnect to the protected WiFi network. Because the smartphone has disconnected from the real WiFi network, the Chromecast should report ‘Check internet connection’ and advise that there is no internet connectivity. The Chromecast should now connect to the ChromecastAP network. You will be warned that the smartphone will disconnect from the current WiFi network and connect to ChromecastAP once setup is complete. Set up the device as usual, and when asked to select a WiFi network, choose the ChromecastAP WiFi hotspot you created earlier. (If your Chromecast has already been set up and you cannot connect to it, you will need to perform a factory reset by holding down the button on the side.) Now start the Home app on the smartphone, and choose the option to set up a new device. Bridge mode will enable the smartphone and Chromecast to see each other on the same network, whereas NAT mode will prevent the smartphone from communicating directly with the Chromecast. Important: The WiFi hotspot must be created in bridge mode, not NAT mode. sudo create_ap -m bridge wlp2s0 enp0s20u1 ChromecastAP wifipassword, where wlp2s0 and enp0s20u1 are the relevant network devices from ip link, and ChromecastAP and wifipassword are the SSID and password you choose for the new hotspot. On Arch Linux, this can be easily accomplished using the create_ap package, running e.g. Use the laptop to create a WiFi hotspot in bridge mode. This should also be possible on iOS, but I do not have an iOS device to test. On Android, go to Settings → Network & internet → Hotspot & tethering and enable USB tethering. Detailed instructionsĬonnect to the protected WiFi network on the smartphone, and complete the captive portal or login sequence as appropriate.Ĭonnect the smartphone to the spare laptop, and enable USB tethering on the smartphone. This approach works for both initial setup of the Chromecast, and for controlling and streaming media. Use USB tethering to share the connection with a spare laptop (or other WiFi-enabled computer). Use the controlling smartphone to connect to the protected WiFi network. To save you the trouble, here is the method that worked for me: Solution There are a number of theoretical options, but I had great difficulty with them. In theory, it should be possible to create a WiFi hotspot from an existing connection, but this is difficult when the existing connection is itself WiFi and takes up a WiFi network card. This presents a problem when wired internet is not readily available and we do not want to use our mobile data. hotel WiFi) or WPA2-Enterprise/802.1X username/password authentication (e.g. The Google Chromecast does not support WiFi networks with captive portals (e.g.
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