JonKClark
Posts: 1
Joined: Fri Nov 15, 2019 5:22 pm

How to turn on Multiple TVs using a raspberry Pi?

Fri Nov 15, 2019 5:34 pm

Hello,

Forgive me if this is the wrong forum, if it is let me know and I will correct that.

Here is the situation. I work for a company with a large production facility. Currently we have about 45+ TVs that have a PC connected to them to display information produced by our communications department. The problem is when there is an interruption in the content either due to the PC's getting updates and rebooting or some other loss of signal issue, the TVs turn off. This then requires our local IT team to travel the production floor(over 1.5 Mil. Sq. Ft.) and manually turn the TVs back on.

So the question is: Is there a way for a Raspberry Pi to be used with an IR transmitter to turn a TV on? If so, if we outfit all the TVs with these, how can I send the "Turn On" to all of the PI devices at once to do just that?

Thanks,
Jon

blimpyway
Posts: 414
Joined: Mon Mar 19, 2018 1:18 pm

Re: How to turn on Multiple TVs using a raspberry Pi?

Sat Nov 16, 2019 10:53 pm

Wifi, 45 x (esp-01's + ir transmitter diodes).

And a Pi to talk to them all.

btidey
Posts: 1637
Joined: Sun Feb 17, 2013 6:51 pm

Re: How to turn on Multiple TVs using a raspberry Pi?

Sun Nov 17, 2019 9:27 am

If each TV is fed from a PC then you could drive the local IR diode from the PC I believe lirc can drive a diode via the DTR line of a serial port.

Then either the PC locally turns the TV on when its is rebooted or you send network commands to the PC to do it from a central point.

The other thing to check is the type of tv being used. If they have a network connection then they can often be turned on via a network command rather than using IR.

jj_0
Posts: 113
Joined: Wed Jul 11, 2012 7:07 am

Re: How to turn on Multiple TVs using a raspberry Pi?

Sun Nov 17, 2019 9:40 am

No Pi required if you already have a PC with each TV. You can use a USB infrared transmitter or possibly even a infrared transmitter connected to the sound out and use that in combination with WinLirc to switch on the TV.
I hope your TV's have a different 'on' and 'off' infrared command though, and not only 'on/off toggle' command.

JohnsUPS
Posts: 185
Joined: Fri Jul 06, 2018 2:13 am
Location: USA

Re: How to turn on Multiple TVs using a raspberry Pi?

Mon Nov 18, 2019 11:56 pm

If the TVs are on a network, they may respond to a wake on LAN broadcast.....

Otherwise, (as was previously mentioned) it would be perfectly feasible to configure a Pi with an IR LED connected to a GPIO pin and modulated with the "turn on" remote control code bit banged by a snippet of code. For that matter, you could configure many other codes in the event that you want to change channels, adjust the volume or whatever.

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