![]() To configure Wake-on-LAN in Windows 8* or Windows 7*: Press F10 to save and exit the BIOS Setup.Press F2 during boot to enter BIOS Setup.Wake-on-LAN must be enabled in the desktop board BIOS and then configured in the operating system. ![]() A computer that has an Internet connection and is Advanced Configuration Power Interface (ACPI) compliant can be turned on remotely from anywhere in the world. Wake-on-LAN is a hardware/software solution allowing a computer to be woken up remotely. We'll give you the details in a follow up post. The YoctoHub-Ethernet can do that as well. If you want to power your computer from outside of your home, for instance to log on it with a solution like LogMeIn or Ammy, you would need to cross the NAT filter of you DSL router, which normally protects you from intrusions. The version presented today does however have a small limitation: as we put the web interface directly on the YoctoHub-Ethernet, it is available only from the local network. The consumption of the YoctoHub-Ethernet is only of 0.5W, which is on par with the best Wake-on-Lan or AMT solutions. The file is just the sum of yocto_api.js, yocto_network.js and yocto_relay.js, which has then been put through a JavaScript code optimizer to reduce it to the minimal size in order to enable this page to load as fast as possible. ![]() ![]() You can upload your own HTML interface on the YoctoHub-Ethernet To do so, click on the manage files button in the YoctoHub-Ethernet configuration interface, and load the files. We can now load this interface (HTML, Js, and image files) directly on the YoctoHub-Ethernet, which literally transforms it into a dedicated tool. In order to dynamically change the button depending on whether the PC is turned on or off, we have created an image larger than the button itself and we change its position according to the part of the image that we want to show. Here is the HTML code of the web interface. We will host this Web App directly on the YoctoHub-Ethernet. A simple web interface in HTML/JavaScript is enough. We are now going to see how to create an interface to power the computer from a mobile phone or a tablet.įor a task as simple as an impulsion on a relay, it is not necessary to create a dedicated App for Android or iOS. YoctoHub-Ethernet + Yocto-Relay = Yocto-Relay-Ethernet We must use a YoctoHub-Ethernet which allows us to drive the relay through the network autonomously. To be able to power the computer, we can't simply connect the relay by USB on the computer. It is not necessary to use a Yocto-PowerRelay as we are not going to really commute power from the mains, we are only going to simulate the "user pressed the power button" signal.Ī Yocto-Relay, driven by a YoctoHub-Ethernet is wired in parallel with the PC power button In the end, the most general and simple solution, which we retain, consists in adding a Yocto-Relay in parallel to the power button. Therefore, not all that useful for a small solution. And naturally, its implementation is complex and possible only on some computers, usually brand computers designed for the "business" customers. Everything is done through complex protocols, encrypted to ensure security. This method gives to the network card with a very large control over the computer, its power supply, its BIOS settings, and even allows remote access. Intel introduced more recently a new method call AMT (Active Management Technology). After a short delay, some network switches stop transmitting anything to it. Second, as the network card is purely passive, it can't participate to the standard network protocols such as ARP and DHCP. First, any irregularity when powering off the computer puts the network card in a state where it can't listen to magic packets. Unfortunately, this method is not very reliable. Power is always supplied to the network card, which listens on the network to detect a "magic packet" to power the computer on. The oldest method is called Wake-on-Lan (WoL). By the way, there are even mechanisms designed to drive power on remotely. The power supply voltage remains always partially in, and the power button is in fact a "logical" switch, managed smartly by the operating system to protect disk integrity. You can't switch on a computer like a light bulb, by commuting power with a relay. So, how do we power a computer remotely from the couch? Either it is always on, which is not very rational, or you must turn it on and off before and after, which does kill the magic. If this new solution is more elegant and less noisy, it doesn't solve all the issues: you must still have somewhere a real machine storing your movie library. Tablets and other small media players, that enable you to view DivX movies comfortably sprawled on your couch, have relegated to the closet wholesale Media Centers that hummed loudly in the living room.
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