kent.smith wrote: Mon Nov 06, 2023 3:58 pm
The instructor wirelessly streaming content to a TV
Most phones rotate MAC addresses so they can’t be tracked, so blocking the MAC from the wifi likely won’t work.
A simple fix could be to turn off the TVs wifi and just use a cable between the phone and the HDMI port on the tv.
If you still want to maintain the wireless capabilities of the TV, then you could try to PIN protect the TVs “stream” feature, depending if the TV has this feature. By PIN protecting you can control who can stream to the TV by giving the pin only to the teacher. If the TV doesn’t have that feature, could install a device that does. For example, I know Apple TV (the device, not the service) you have to have the pin to connect and stream to it. I believe ChromeCast also has this ability. Below are instructions I found after a quick search.
I hope this helps!
-Joe
ChromeCast
Turn off “Guest Mode” on Chromecast
Plug your Chromecast into the TV and connect it to a power source. Open your Google Home app on your smartphone or tablet. Find your Chromecast among the connected devices and tap on its tile. Click on the Settings

icon at the top right corner of the screen. Disable “Guest Mode” and save the changes.
Android TV
Go to Settings on your Android TV. Navigate to Network & Internet and then Wi-Fi. Tap on Device Management or Connected Devices. Locate the devices that you want to block from casting and select them. Choose the option to block or disconnect the selected devices.
Apple TV
On your Apple TV, go to Settings. Select AirPlay and HomeKit.
Choose “Allow Access.” Turn off “Everyone” and switch to “Only People Sharing This Home” or “Anyone on the Same Network.”
or
“Conference Room” mode: Set Apple TV so that Conference Room Display mode is locked until a 4-digit passcode is entered. Open Settings on Apple TV. Go to General > Restrictions, and enter the passcode if required. Make sure Conference Room Display is set to Restrict in the list of restricted items.
Roku
Navigate to Settings on your Roku device.
Select Screen Mirroring. Choose “Prompt” or “Always Allow” depending on your preference. Identify the devices that you want to block and change their access setting to “Never Allow.”
Fire TV
Unfortunately, there is no built-in option to block specific devices from casting on a Fire TV. However, you can try the following steps: Go to Settings on your Fire TV. Select Display & Sound and then HDMI CEC Device Control. Turn off the HDMI CEC Device Control feature.