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1. Top results related to communication device of computer

   • Communication Usb Device in Flutter

     Top Answer

     Answered Jun 16, 2020 · 3 votes

     Hey i have the same issues, but i found this flutter_usb_write. It can be useful but it's a very new plug-in so i'm testing it but I'haven't already the solution. If you want you can try to use it i'll do too, and if i found something interesting i'll tell you. flutter_usb_write

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     1/5

   • Communication with the USB device in Python

     Top Answer

     Answered Sep 22, 2012 · 9 votes

     Assuming your using Linux and libusb-1.0 as a PyUSB's backend library.

     According to the libusb documentation:

     // Detach a kernel driver from an interface.// If successful, you will then be able to claim the interface and perform I/O.int libusb_detach_kernel_driver (libusb_device_handle *dev, int interface_number) // Re-attach an interface's kernel driver, which was previously // detached using libusb_detach_kernel_driver().int libusb_attach_kernel_driver(libusb_device_handle *dev, int interface_number)

     So basically, you need to call detach_kernel_driver first to detach already attached kernel driver (if any) from the device's interface, so you can communicate with it in your code (it's either your code or some kernel driver talking to the device's interface). When you're done, you may want to call attach_kernel_driver to re-attach the kernel driver again.

     I believe there's no need to call any of those C functions/Python methods if you can ensure that no kernel driver is loaded for a given device (or manually unload it before running your code).

     Edit:

     I just got this piece of code (based on your sample) working. Note: for simplicity I've hardcoded 0 as interface number for detach_kernel_driver and attach_kernel_driver - you should make it smarter, I suppose.

     import usb-dev = usb.core.find(idVendor=0x0403, idProduct=0x6001)-reattach = Falseif dev.is_kernel_driver_active(0): reattach = True dev.detach_kernel_driver(0)dev.set_configuration() cfg = dev.get_active_configuration() interface_number = cfg[(0,0)].bInterfaceNumber alternate_settting = usb.control.get_interface(dev, interface_number) intf = usb.util.find_descriptor(cfg, bInterfaceNumber = interface_number, bAlternateSetting = alternate_settting) ep = usb.util.find_descriptor(intf,custom_match = \ lambda e: \ usb.util.endpoint_direction(e.bEndpointAddress) == \ usb.util.ENDPOINT_OUT) ep.write("test\n\r")# This is needed to release interface, otherwise attach_kernel_driver fails # due to "Resource busy"usb.util.dispose_resources(dev)# It may raise USBError if there's e.g. no kernel driver loaded at allif reattach: dev.attach_kernel_driver(0)

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     2/5

   • Communication of Offer, Acceptance and Revocation

     When it comes to the field of contract law, efficient communication is a fundamental component that determines the process of forming, accepting, and rescinding offers. In 1872, the Indian Contract Act was created, which offers a thorough foundation for comprehending the dynamics of communication within contractual relationships. To shed light on the intricacies that drive these essential components of contract formation in India, this essay dives into the fundamental concepts that underline the communication of offer, acceptance, and revocation.

     A clear and definite offer is required under Section 2(a), which states that “An offer must be able to create a legally enforceable agreement and must be clear and definite. Uncertainty and the possibility of disagreements might result from terminology that is ambiguous or vague.”

     Geeky Takeaways:

     • When contracting parties are face to face and negotiate in person, there is an instantaneous communication of offer and acceptance which gives rise to a valid contract.

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     3/5

   • Communication between an USB HID device and usb4java

     Top Answer

     Answered Feb 28, 2016 · 1 votes

     Assuming you've already put in your Linux udev

     rules... (Other solutions available here).

     According to the usb4java Low-Level API documentation.

     INCORRECT:

     // Check if kernel driver must be detachedboolean detach = LibUsb.hasCapability(LibUsb.CAP_SUPPORTS_DETACH_KERNEL_DRIVER) && LibUsb.kernelDriverActive(handle, interfaceNumber);

     Unfortunately, this code example on their website is incorrect, kernelDriverActive doesn't not return a boolean, but rather an int. The API shows that one

     is a positive match (the rest are negative matches or errors.)

     CORRECTED: kernelDriverActive(...) == 1

     // Check if kernel driver must be detachedboolean detach = LibUsb.hasCapability(LibUsb.CAP_SUPPORTS_DETACH_KERNEL_DRIVER) && LibUsb.kernelDriverActive(handle, interfaceNumber) == 1;

     On a side note, I'd personally recommend using the High-Level API when possible, since it takes out the low-level guesswork.

     iface.claim(new UsbInterfacePolicy(){ @Override // Force unloading of Kernel driver public boolean forceClaim(UsbInterface usbInterface) { return true; }});

     On a final note, for those coming here for a solution to OS X kernel driver issues, check out this writeup.

     On a side-note, I've found this information (dealing with conflicts, cross-platform caveats) skattered and difficult to find, in part because of redundancies in FAQ sections (sourceforge vs. github, c API vs. Java API, Mac questions versus Linux question with very similar titles, cross-links to lengthy mailing-list conversations).

     Perhaps the various upstream project maintainers can work together in regards to crawling stack-overflow for FAQs, cross-linking to other upstream FAQs and marking outdated wiki articles as such.

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     4/5

   • Communication of microservices at deleting an object

     Top Answer

     Answered Jan 27, 2019 · 4 votes

     You have a bigger problem: one microservice must make a decision based on a piece of data that it doesn't own.

     That data is eventually consistent. For example, microservice A would get permission from microservice B to delete something but in the meantime the situation would change on microservice B: you will have deleted something based on expired information.

     I suggest to have a look at your design as a whole, maybe you've missed some important concept or have split the monolith in the wrong microservices.

     If you still want to keep the current architecture then I suggest to keep a local cache of the remote resource usage. You would interrogate this local cache before deleting the resource without the need to synchronously communicate with the other microservice. This will make your system simpler and also more resilient.

     The local cache can be keep up-to-date using events. Whenever the microservice B starts using the resource it would inform microservice A about it; the same when it no longer uses the resource. Using the events is the preferred way. Here you can use your event bus.

     Or you could use a background task that runs periodically; this has the advantage that the microservice B remains untouched but it has the disadvantage that there could be a big time-gap between synchronizations.

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     5/5

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2. People also ask

   What is a communication device?

   • A communication device is a hardware device capable of transmitting an analog or digital signal over the telephone, other communication wire, or wirelessly.

   What is a Communication Device? - Computer Hope

   www.computerhope.com/jargon/c/communication-devices.htm

   See all results for this question

   How a computer can communicate with other devices?

   • The versatility of a computer gets enhanced considerably when it can communicate with other devices and computers. For a two-way communication, a computer must be equipped with a modulator for outgoing data and a demodulator for the incoming data. This modulating device is referred to as a modem.

   Definition of Communication Devices | Techwalla

   www.techwalla.com/articles/definition-of-communication-devices

   See all results for this question

   Is a laptop a communication device?

   • Laptops and desktop computers are also communication devices. In some cases, the term communication device might refer specifically to devices that enable direct and though not necessarily real-time person-to-person communication. In this case, some electronic devices with network connectivity may be excluded.

   What Is a Communication Device? - Technipages

   www.technipages.com/what-is-a-communication-device/

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   What is a digital communication device?

   • Digital communications are a cornerstone of the contemporary world. A communication device is any electronic device capable of communicating with other electronic devices. In the vast majority of cases, this refers explicitly to electromagnetic communication.

   What Is a Communication Device? - Technipages

   www.technipages.com/what-is-a-communication-device/

   See all results for this question

3. www.computerhope.com › c › communication-devicesWhat is a Communication Device? - Computer Hope

   www.computerhope.com › c › communication-devices

   • Cached

   Oct 7, 2019 · A communication device is a hardware device capable of transmitting an analog or digital signal over the telephone, other communication wire, or wirelessly. A classic example of a communication device is a computer modem, which converts a computer's digital information to an analog signal for transmission over a telephone line.

4. www.technipages.com › what-is-a-communication-deviceWhat Is a Communication Device? - Technipages

   www.technipages.com › what-is-a-communication-device

   Aug 18, 2022 · A communication device is any electronic device capable of communicating with other electronic devices. In the vast majority of cases, this refers explicitly to electromagnetic communication. However, this is not a hard restriction, allowing, for example, devices that only communicate with other devices via audio.

5. www.geeksforgeeks.org › what-is-communication-deviceWhat is Communication Device? - GeeksforGeeks

   www.geeksforgeeks.org › what-is-communication-device

   • Cached

   May 17, 2024 · A communication device is an electronic device. Communication devices send a digital or analog signal without wire or via a wired network. A computer modem is an example of a communication device, which converts digital data into an analog signal that is transmitted over a phone line.

6. Videos

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     Lec-8: Various Devices In Computer Networks | Hardware and Software Devices | Communicating devices

     Oct 29, 2018

     407.9K Views

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     9:48

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     What are Communication Devices? ;Chapter: 4; Computer Science; Class:9th by Leaders Knowledge Hub.

     Sep 18, 2020

     14.4K Views

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     Input, Output, and Communications Devices

     Dec 18, 2021

     20.8K Views

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7. www.techwalla.com › articles › definition-ofDefinition of Communication Devices | Techwalla

   www.techwalla.com › articles › definition-of

   • Cached

   Tech Support. Reviews. Definition of Communication Devices. By. Eric Bagai. Communication devices are the machines that assist in transmission of data. The versatility of a computer gets enhanced considerably when it can communicate with other devices and computers.

   • Author: Eric Bagai

8. www.coursera.org › articles › what-is-data-communicationWhat Is Data Communication? Basics to Know | Coursera

   www.coursera.org › articles › what-is-data-communication

   • Cached

   Nov 29, 2023 · Basics to Know. Written by Coursera Staff • Updated on Nov 29, 2023. Data communication is the transfer and flow of data from one place to another. Learn all about how it works and careers in data communication.

9. www.techwalla.com › articles › types-ofTypes of Communication Devices Used in a Personal Computer

   www.techwalla.com › articles › types-of

   • Cached

   There are several kinds of communications devices used in a computer, some that provide different ways of achieving the same functionality and some that provide more specialized services. For example, most personal computers provide several ways to communicate with an Internet service provider.

10. courses.lumenlearning.com › computer-devicesComputer Devices | Information Literacy - Lumen Learning

    courses.lumenlearning.com › computer-devices

    • Cached

    Computer Devices | Information Literacy. Peripheral. A peripheral is a “device that is used to put information into or get information out of the computer.” [1] There are three different types of peripherals: Input, used to interact with, or send data to the computer (mouse, keyboards, etc.)