I'm setting up a program called TwoToneDetect which captures the A/B pager tones for the fire department and it can do different things once triggered.
One of the things I want to do is have it turn on a TV.
I'm honestly not sure where to start. I'm vaguely familiar with Pi/Linux (sudo, apt-get, basic commands) but otherwise I'm lost.
Anyone got some pointers or links to someone who may already have a script to turn a tv on some how? I'm not 100% sure that the TV we'll be using supports CEC, the TV obviously has IR and it also has the Samsung Ext "serial" port on the back.
Let me know if I can provide more info. Any help is appreciated.
Re: Turn on TV
I've now learned of the "tvservice".
I started reading around and I tried the "tvservice -s" and it's only saying "DVI DMT", nothing about HDMI.
pi@raspberrypi:~ $ tvservice -s
state 0x120006 [DVI DMT (81) RGB full 16:9], 1366x768 @ 60.00Hz, progressive
I'm using a new HDMI cable, no adapters. Thoughts?
I started reading around and I tried the "tvservice -s" and it's only saying "DVI DMT", nothing about HDMI.
pi@raspberrypi:~ $ tvservice -s
state 0x120006 [DVI DMT (81) RGB full 16:9], 1366x768 @ 60.00Hz, progressive
I'm using a new HDMI cable, no adapters. Thoughts?
Re: Turn on TV
I don't know whether this works for a TV or not, but typing vcgencmd display_power 1 in a terminal wakes my monitor up, and typing vcgencmd display_power 0 puts it to sleep.
The reason I've given those in reverse order is so that you can use the keyboard up-arrow followed by Enter to call the turn on command again blind or you'll be stuck with having to reboot the Pi to wake the display up.
Both work exactly as expected from inside a BASH script, so I'm fairly sure they will be accessible via other programming languages too.
The reason I've given those in reverse order is so that you can use the keyboard up-arrow followed by Enter to call the turn on command again blind or you'll be stuck with having to reboot the Pi to wake the display up.
Both work exactly as expected from inside a BASH script, so I'm fairly sure they will be accessible via other programming languages too.
Pi2B Mini-PC/Media Centre: ARM=1GHz (+3), Core=500MHz, v3d=500MHz, h264=333MHz, RAM=DDR2-1200 (+6/+4/+4+schmoo). Sandisk Ultra HC-I 32GB microSD card on '50=100' OCed slot (42MB/s read) running Raspbian/KODI16, Seagate 3.5" 1.5TB HDD mass storage.
Re: Turn on TV
Unfortunately it worked but didn't. It will sleep the screen but it won't "wake" it from a full off position. I've seen some TV's (Sharps) that can go into a light sleep (standby?) but I don't think this TV does that.
Re: Turn on TV
I use lirc to send IR commands to turn my Vizio TV on and off.
Re: Turn on TV
What do you use for an IR blaster then?
Re: Turn on TV
I don’t - an IR led is easily bright enough to turn on the TV from where I have the Pi located.
It’s very easy to make a super-bright IR emitter. Just use a number of IR LEDs in parallel, driven by a MOSFET.
It’s very easy to make a super-bright IR emitter. Just use a number of IR LEDs in parallel, driven by a MOSFET.
Re: Turn on TV
I'd really like to get this "tvservice" command to work if I can, nothing extra to add if it can work.
When I run any power on command it essentially blanks out the screen and the TV sees no input. Have to figure out what it's doing when it does that.
When I run any power on command it essentially blanks out the screen and the TV sees no input. Have to figure out what it's doing when it does that.