Firmware\u2026 you\\'ve probably heard about it at some point. It sounds like a weird German name, doesn\\'t it? But what is firmware? What is the meaning of this term, and how would you define firmware? What does firmware do? How does firmware work? Surely, its purpose is not just to confuse you. As you will learn in this tutorial, the firmware is critical for hardware devices of all kinds, from smartphones to smart TVs to washing machines and other devices. To clear things out and help you become more knowledgeable on this subject, we explain all the essential things you need to know about firmware in this article. Let\\'s get started:\r\n\r\n\r\nWhat is firmware? Firmware definition in simple terms\r\nFirmware is a small piece of software that makes hardware work as its manufacturer intended it to. It consists of programs written by software developers to make hardware devices \\"tick.\\" Without firmware, most of the electronic devices we use daily wouldn\\'t be able to work. They would not do anything.\r\n\r\nFor example, did you know that a simple traffic light has firmware on it? Yes, it does, and the firmware is what tells it to change the lights at regular intervals. Without firmware, the traffic light would be just a \\"stupid\\" mast, placed on the side of the road, doing nothing except looking bored. What is firmware in the case of less sophisticated hardware devices such as traffic lights, washing machines, card machines, surveillance cameras, and TVs? The firmware is all the software on them, also acting as their operating system and controlling everything about those devices\u2019 functioning.\r\n\r\n\r\n\r\nTraffic lights need firmware to run\r\n\r\nTo make things even clearer, let\\'s take another example: a computer motherboard without firmware would not know how to detect the hard drive or the video card found inside your computer. If your hard drives didn\\'t have firmware embedded in them, they wouldn\\'t know how fast to spin or when to stop. A wireless network card wouldn\\'t know how to use a particular radiofrequency for connecting to Wi-Fi.\r\n\r\n\r\n\r\nMany PC components (motherboard, graphics card, etc.) need firmware\r\n\r\nWe often tend to think about a hardware device as a device that is just hardware. And we assume that it just works by itself. However, almost none of the modern hardware devices would work without this particular software written directly onto them.\r\n\r\n\r\nWhat is firmware in Android?\r\nWhat is firmware in mobile? How would you define firmware in devices with complex hardware such as smartphones, tablets, smartwatches, or even smart TVs? In this case, a fairly good firmware definition would be this: the firmware is the middleman between the hardware and the operating system.\r\n\r\nOn such devices, the firmware contains only the necessary instructions for the hardware to be able to work with the operating system installed on the device. For example, on a Samsung Galaxy smartphone with Android, the smartphone\u2019s firmware allows the hardware to communicate correctly with the Android operating system and do what is requested by the user.\r\n\r\n\r\n\r\nAndroid smartphones and tablets also have firmware\r\n\r\nUnfortunately, there\u2019s a problem with what many people tend to believe the firmware is in Android smartphones, tablets, smartwatches, smart TVs, and other similar mobile devices. Android smartphones and mobile devices have conquered the world, and many users want to update the \u201cfirmware\u201d on their devices, install custom ROMs, and so on. The problem is that most people now incorrectly use the term firmware when they refer to smartphones and other mobile devices.\r\n\r\nBecause of that, we want to explain the technicalities of firmware when referring to smartphones and mobile devices, so that you get things right:\r\n\r\n \tFirmware meaning, especially when speaking about devices with Android, has been incorrectly expanded in popular culture to encompass all the software on those devices. Android \u201cfirmware\\" now means the firmware plus the Android operating system on top of it.\r\n \tYou also encounter the term Custom ROM. ROM doesn\u2019t mean, in this case, the Read-Only Memory, where the firmware is stored in the smartphone\u2019s hardware. Custom ROM means a custom operating system image that also includes the firmware necessary for the Android smartphone or tablet to work. So you get two things in the ROM of a smartphone: the firmware, which is the same as in the definition we shared earlier, and the operating system on top of the firmware.\r\n \tWhen you buy a smartphone, it comes with a \u201cstock ROM\u201d or \u201cstock firmware.\u201d This refers to the preinstalled firmware and operating system. The \u201cstock ROM\u201d is provided by the manufacturer of the smartphone (if you have bought it unlocked) or by the mobile operator where you have a subscription (if you purchased a locked smartphone). The mobile operator uses the \u201cstock ROM\u201d that is offered by your smartphone\u2019s manufacturer and modifies it according to their interests, resulting in a new \u201cstock ROM\u201d that is found only on the smartphones that are sold by that mobile operator.\r\n\r\nThe same goes for smart TVs, tablets, and other mobile devices with Android.\r\n\r\n\r\nWhere is the firmware stored?\r\nWe now know the firmware definition and have a better grasp of the meaning of firmware. It\u2019s software written directly into our hardware devices, mandatory for them to power on and start working. But how exactly is it stored on a device? Firmware is usually stored in special types of memory, called flash ROM. ROM is the acronym for Read-Only Memory, and this kind of memory should only be written once, usually by the manufacturer of the hardware that we are using. A ROM memory is needed for any electronic device because it must hold data permanently, even when the device is turned off or when there is a power outage. You can\\'t produce a hardware device that forgets its firmware, as it would cease to function once you pull out its source of energy.\r\n\r\nBut then again, flash ROM memory is a rewritable ROM memory because, while the hardware manufacturer initially writes it, you can also rewrite it afterward. Of course, you can write new firmware onto a hardware device. However, you can only do it with a proper firmware updating tool specially designed to work for that hardware device.\r\nWhat types of firmware are there?\r\nThere is as much variety in firmware as there is in hardware devices. There\\'s firmware in computer motherboards (it\\'s called BIOS or UEFI), there\\'s firmware in hard disks, solid-state drives (SSDs), CD/DVD/Blu-Ray drives, there\\'s firmware in network cards, routers, access points, range extenders, there\\'s even firmware in your gaming mouse and keyboard. And these are just some examples related to computers.\r\n\r\n\r\n\r\nEven keyboards rely on firmware to run\r\n\r\nYou should remember that firmware exists in most of the devices that do something useful, like your TV, washing machine, the ATMs of your bank, or even in your car. You name the device; it probably wouldn\\'t work without its firmware.\r\nWhat is the difference between firmware and drivers?\r\nWhile both firmware and drivers have the role of allowing hardware to do what is requested of it, one important difference is that firmware is stored on the hardware device itself, while drivers are installed inside the operating system. Also, firmware can start on its own and do what it is programmed to do, while drivers must be run by the operating system. The most significant difference between the two is that the firmware tells the devices what they should do, while the driver tells the operating system how to communicate with the same devices.\r\nCan you upgrade firmware? What is firmware update?\r\nMany manufacturers release regular updates for the firmware found on their hardware devices. They also provide the necessary software tools to write the new firmware onto those devices. However, each manufacturer can choose whether it releases new firmware for an individual device or not. For instance, most computer parts manufacturers develop and provide customers with new firmware and the corresponding firmware updaters, for at least for a few years after the device was launched.\r\n\r\n\r\n\r\nFirmware update for a computer motherboard (UEFI BIOS update)\r\n\r\nTo give you an example, your motherboard\u2019s manufacturer can release new firmware updates when it wants to include new features, support new processors or RAM, or if it solves specific problems with your hardware.\r\n\r\nAny manufacturer can choose to deliver new firmware for its devices: a router can receive a firmware update that enhances its stability, a Blu-Ray disc writer can learn how to burn new types of discs, and so on.\r\n\r\nAs far as where to get new firmware from, that depends on your hardware device manufacturer. Usually, you can find new firmware (if available) on your device\\'s support website. Look for a download page, download your new firmware, and be careful to follow the device manufacturer\u2019s upgrade documentation.\r\n\r\n\r\n\r\nFirmware upgrade for a router\r\n\r\nWriting new firmware on your device is a dangerous job and, if done incorrectly, can render your device useless. Forever! Like a brick! That\\'s why some people tell you that you bricked your device: you just ruined its firmware, and it can no longer function as it was intended to.\r\n\r\nIf you need some help with updating the firmware on your devices, we recommend the following guides:\r\n\r\n \tHow to do a firmware update for any kind of device\r\n \tHow to update the BIOS of your motherboard\r\n\r\nDo you have any other questions related to \u201cwhat is firmware\u201d?\r\nAnd now you know what firmware is, what it does, and where it\\'s found. Was our explanation good enough? Do you understand this concept, and can you define firmware now? Are you still confused by Android \u201cfirmware\\"? Don\\'t hesitate to let us know if you have any other questions regarding what firmware is in the comments section below.