Wol: Wake up your devices with a single command or click

by thunderbong • 2 years ago

25 27 2 years ago

why_at4• 1 year ago

Related: I have a setup with a PC connected to my TV, it would be nice if there was some way to wake up my PC from sleep using a remote control of some kind. The best way I can think of is using wake-on-lan on another device like a raspberry pi. I could configure it to send the signal when it sees me push a button on my remote.

This doesn't feel very optimal though. Having a whole other device constantly running just to wake up my main device feels like a waste.

r2_pilot2• 1 year ago

If you're already using microcontrollers, why not emulate a USB keyboard with one, and have an IR sensor that triggers a key press when it gets a signal?

why_at4• 1 year ago

The problem is that when it's asleep a key press won't wake it up. Only pushing the power button or using wake-on-lan will.

One thing I just thought to try is using an app on my phone to send the WOL packet.

russdill• 1 year ago

I do this with a USB device that looks like a keyboard, but speaks CEC out the other end. TV turns on with the appropriate source selected, the keyboard sends a wake key.

kardos• 1 year ago

Having a whole other device constantly running just to wake up my main device feels like a waste.

Indeed, my first thought is the best place to run this is on an OpenWRT router. Perhaps as a package, or a builtin feature?

ngetchell• 1 year ago

I had an IR remote that was set up to wake my Kodi box on button press. Seems very doable.

Rygian• 1 year ago

Why not from your phone? I wake up my kodi pc with a remote that supports WOL.

why_at4• 1 year ago

Yeah I just thought of this, gonna give it a try today

smitelli• 1 year ago

Tiny PSA: The official Kodi app (at least on iOS) has built-in WOL commands.

diggan2• 1 year ago

I think if you have recent (not sure how recent?) HDMI ports, you can do this via a HDMI cable, which you might already use for displaying purposes? Never encountered it myself until I recently got a PS5 and noticed it and the TV shared both control and power state, so turning on the TV turned on the PS5 before I disabled HDMI CEC.

Alternatively, maybe there are adapters for HDMI that could add/emulate it/something similar?

why_at4• 1 year ago

I remember looking into this and it seems like a lot of motherboards/graphics cards don't support HDMI CEC for some reason.

That would be the ideal way if it worked though

blibble• 1 year ago

I did exactly this last year

    1. radio remote with usb dongle that emulates a keyboard, so usual wake-on-keypress wakes up the machine
    2. systemd unit that when sleep ends sends "power on" to TV via IR blaster

works lovely

mystified50162• 1 year ago

Grab an arduino Leonardo, micro, or any board that supports USB HID emulation. Throw on a simple IR receiver module and set it up to send a keypress when the power code comes through.

You might have to explicitly enable "allow this device to wake computer" in device manager.

As far as I'm aware, there's no special sauce here. Your motherboard should support leaving USB ports on and allowing wake from USB HID devices. I don't know of any consumer board from the modern era that doesn't support it.

Beyond that, you could just throw a relay across the power switch pins. Plenty of ways to skin this cat

atmanactive• 1 year ago

My solution is tied to Home Assistant, which is running for the whole house 24/7 anyway, then, a Z-Wave smart plug to turn the PC on/off, and, finally, an EnOcean kinetic battery-less switch to toggle it on and off. While we're at it, Home Assistant also powers on/off the TV, sets the input, sets volume, and dims the living room lights.

kadoban• 1 year ago

I have this set up with a Flirc device. It listens for IR remote control keys and converts to ~keyboard keys. So the PC wakes up for the same reason a keyboard would wake it up. I can also control the PC that way, for watching movies and such. That's the main reason to do it actually, the waking up is just a bonus.

leosanchez• 1 year ago

If you are on same network you can use Wake on Lan android app.

conqrr• 1 year ago

Similar problem, since my personal home server may sometimes need a restart and may be unreachable, I need something like this that works over the Internet.

I use a cheap smart plug and PC auto start on power setting and it works beautifully.

praash• 1 year ago

You can make WoL work with a forwarded UDP port on your router. Most WoL tools also tolerate the use of a domain instead of an IP. Obviously this can't shut your server down.

Downside: unencrypted magic packets sent over the network could be captured and maliciously repeated for your annoyance.

mcshicks• 1 year ago

I use this one seems to do what I need. It's pretty easy just to Google the cli case.

https://github.com/sameerdhoot/wolweb

neilv• 1 year ago

A few things to add, since Wake-on-LAN either just works the first time, or is a headache to figure out why it doesn't:

* The target device might have to be on Ethernet, not WiFi.

* You might have to enable this feature on the target device, such as in the motherboard firmware setup for onboard network interfaces, and/or in the host OS. (I had a machine that required doing both, for an onboard Ethernet device.) For Linux host OS, such as on Debian Stable, if the device doesn't default to wake-on-LAN enabled, you'll probably use `ethtool`, testing it with something like the following, and then have to put the last line as an init/systemd script, so that enabling persists across boots.

    ip a
    sudo ethtool MYDEVICE
    sudo ethtool -s MYDEVICE wol g

* You need to get the magic packet onto the right LAN. Maybe this means plugged into the same network switch or routed LAN, but it can get more complicated, even with small home WiFi routers, various ways. (Including if you're on WiFi but the target is not, or you're on a different VLAN, or it's isolating LAN devices from each other in the WiFi device or router, or any of multiple kinds of 'firewall' filtering is between you.)

* There are many ways to send the magic packet. Lately, I `apt install etherwake` on a host that's on the same LAN, or even the equivalent on a router once.

* From there, if the sending device has multiple network interfaces or VLANs, you might have to tell the program which to send the packet on.

* I sometimes make pairs of one-line scripts named `start-`<hostname> (which does Wake-on-LAN, possibly by SSH into a jump box of some kind) and `stop-`<hostname> (which does something like SSH to invoke `shutdown`). Kludgey, but they pretty much always work.

MathMonkeyMan• 1 year ago

Here's the meat and potatoes, for anyone thinking of doing this themselves: <https://github.com/Trugamr/wol/blob/74753afa3052f8aed2b20517...>.

Wol: Wake up your devices with a single command or click

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