USB receiver for wireless keyboard?

pmam · Veteran Joined: 30 Dec 2013 Posts: 1145

I found down the street this nice wireless keyboard: https://www.amazon.com/Microsoft-Natural-Ergonomic-Desktop-7000/dp/B000Q6UZBM
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwiihPT68YTbAhWHalAKHckLBAEQFgg2MAE&url=http%3A%2F%2Fdownload.microsoft.com%2Fdownload%2F7%2FA%2F2%2F7A2A35DD-7FA8-4EAC-8A41-F47884AB8783%2FTDS_NaturalWirelessErgonomicDesktop7000.pdf&usg=AOvVaw3Ks1EQBjKF8klmduKETa2i
Assume that it is working, however USB receiver is missing - According spec above it is 2.4G but do not know what exact receiver will be suitable,
and if it will work ok with linux? There is a standard for 2.4G receiver or there are many kind of specs?
If you know such receiver please attach ebay's link..
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eccerr0r · Posted: Mon May 14, 2018 11:28 pm Post subject:

There is no real standard. Likely you'll have to locate the same manufacturer receiver.

I avoid wireless keyboards and mice that are missing its corresponding receiver, finding the right receiver at the right price is difficult.

Incidentally I have two (actually, three, but these two are more or less identical-looking) Logitech mice with their corresponding USB dongle. I can't get the two to "cross breed" for whatever reason, they always seem to go to their corresponding USB stick.

However once you locate the right receiver, they and pretty much all USB HID keyboards and mice show up and work perfectly as HID standard USB devices.
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Jaglover · Posted: Tue May 15, 2018 12:44 am Post subject:

These need to be paired. Imagine an office with tens of wireless keyboards and mice. If these were not paired it would be a nice mess.
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eccerr0r · Posted: Tue May 15, 2018 3:50 am Post subject:

I've had the battery out of these two mice for a while but they will never use the other receiver, nor does there seem to be a pairing button that's available on all of my other (older) wireless mice.
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pmam · Veteran Joined: 30 Dec 2013 Posts: 1145

eccerr0r · Posted: Tue May 15, 2018 8:37 am Post subject:

Bluetooth requires the bluetooth stack, pretty much that's the major drawback. However it means you can use any bluetooth receiver.

With proprietary wireless but standard HID you can plug and play, at least my later model logitech wireless mice are like that. The older model wireless mouse that I have requires pairing, though it does not require PC intervention.
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Jaglover · Posted: Tue May 15, 2018 8:41 am Post subject:

Logitech has (Windows) software in their website to perform pairing if needed. Indeed, if you buy a Logitech mouse or keyboard it comes already paired.
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NeddySeagoon · Posted: Tue May 15, 2018 10:37 am Post subject:

pmam,

At the USB end these things are more or less standard HID devices. The kernel has lots of different HID drivers to take care of the various vendor specific quirks.

At the keyboard end, they are all keyboards, mice or whatever.

Modern ones that operate in the 2.4GHz unlicenced mobile band are neither wifi nor bluetooth compliant.
They all do their own proprietary protocol while conforming to the UMB RF rules.
That means you need to have the right vendor specific receiver that understands the protocol and some way the pair the devices.

I suspect that the hardware is NFC or bluetooth, as there is no point in inventing yet another RF standard but the bluetooth/NFC will not be exposed in the USB dongle, it will be dealt with in the dongle firmware.
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eccerr0r · Posted: Wed May 16, 2018 1:49 pm Post subject:

Of the bluetooth keyboards I have, they also have a *very* slight latency between push and registration. Not sure if it's a problem with my keyboard or due to packetization of keypresses, but sometimes it's noticeable. Same with a bluetooth mouse.

Wireless keyboards and mice have existed prior to NFC standardization and I doubt they defined the standard. Different models and brands tend to run on different frequencies, I'll have to open up or get a spectrum analyzer and see what frequencies my keyboards run at.
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