Usb keyboard to bluetooth converter

How to convert my wireless keyboard Bluetooth dongle as universal bluetooth dongle?

So I have an old Logitech wireless keyboard which is still working perfectly fine. I was wondering if I could use its bluetooth dongle in order to connect my bluetooth speakers(different brand) to my computer? Is this something possible at all? If so I’d be happy if I could get a hint or some writeups on that.

4 Answers 4

Try this solution found at forums.logitech.com It worked for me. The issue seems to be that the Logitech dongle is using HID mode and needs to be in HCI mode to work with headphones.

I know this is an old thread, but I’m adding this in case anyone else is looking for a solution to this problem.

When I first got my diNovo Edge, I found and tried the solution here. Unfortunately, I also discovered that following these instructions locks the dongle in Bluetooth mode. That is, even when you power up your system, the dongle is in BT mode!

That presented a big problem for me, because I could no longer get into BIOS! (Note: if anyone who sees this knows of a way to use the instructions here to put the dongle in BT mode and retain the ability to get into BIOS, please share it!)

Anyway, I found an alternate solution, two actually!

The first, which is the one I use, is found here. This guy wrote a small program, called LHid2Hci, which works perfectly. All you do is download the binary and place a shortcut to it in your Startup folder. The binary takes two command line options, the VID&PID values of the Bluetooth dongle. (The instructions are all there.)

The program does exactly what the name says, it converts the Logitech Bluetooth dongle from HID (USB) to HCI (Bluetooth) mode! It’s activated when you log in, and voila! you have your Bluetooth dongle, with which you can pair any other device. (I have a Microsoft Bluetooth number pad and a Bluetooth stereo headset.)

The way in which this solution is different is that, when your system reboots, the dongle goes back into HID mode, meaning that your keyboard is immediately connected, and you can get into BIOS!

That’s also why the command to run this program has to be in the Startup folder. It has to run every time a user logs in.

The second solution I mentioned is the LBTService, search on Google.

This is a service that supposedly does the exact same thing as LHid2Hci, but as a service instead of a startup program.

I haven’t used this one, since I found the former solution first, however I’ve seen a lot of people who are using it successfully, so I figured I should mention it.

Or see here (pretty informative and very deep insights): nynaeve.net/?p=5 Cannot create a new post, unfortunately.

I know this is old, but I have tried this, I can get to «Converted 1 HID devices to native HCI mode.» but that is about as far as I can get, it never shows up as a bt device. Any insight to this? I am using a unifying receiver.

Are you sure the dongle is actually a Bluetooth dongle? Logitech is pretty big on their Unifying receivers, which are used to connect up to six Logitech devices using similar (but incompatible) technology to Bluetooth.

The unifying receivers tend to be marked with a ‘red star’ type logo, though my one has the text ‘1000Hz’ printed on it instead because it came with a ‘high performance’ mouse.

If it is one of these propriety dongles, you won’t be able to re-purpose it as a generic Bluetooth reciever.

If your receiver, however, has the blue bluetooth logo on it, it should already be available within Windows as a generic Bluetooth adapter.

I recently stumbled upon this when I was trying to find out the answer to a similar question using my Logitech diNovo Mini Bluetooth dongle. The diNovo mini definitely uses Bluetooth so I was sure the USB dongle was a Bluetooth one. The included dongle has two modes that it operates in, an embedded mode and a Bluetooth mode. It’s set to embedded mode by default which allows you to connect to the Logitech device without having to do the pairing process. To switch it to Bluetooth mode you have to do the following:

1. Unplug the dongle from your computer
2. Press and hold the connect button on the dongle while plugging it into your computer. If you are using Windows then you will probably see a drivers update tooltip showing that it is installing a Bluetooth device.

Once you do this, you can now pair a Bluetooth device directly from Windows by simply going to your taskbar’s Bluetooth icon.

I can’t believe it was that easy. I had an old Logitech BT dongle in a drawer and now I use it for my BT headset. When I googled it I was pretty sure I would have to hack drivers or something. Thank you!

(I’m no expert. Anyone, feel free to correct me if I’m wrong.)

It is possible in general, although a Bluetooth dongle may support only a subset of Bluetooth profiles. I think keyboards operate on HID profile, while speakers require A2DP. So you may or may not be able to use speakers with your specific dongle, depending on what profiles it supports. You should try to pair your speakers with the dongle in the same way you have paired your keyboard and in the same way you have paired your speakers elsewhere. Have in mind that successful pairing may happen even if the dongle lacks support for required profile.

You have paired your keyboard at least once? Or haven’t you?

In case you never had to pair your keyboard with the dongle, there comes another issue: are you sure you’ve got Bluetooth keyboard, not a simple wireless one? It’s good if you are sure, but certainly there are users out there who do not know the difference, so let me explain for them.

As far as I know, vast majority of wireless keyboards and mice uses non-bluetooth (vendor specific, I think) protocols to communicate with their dongles. The reasons are: lower power consumption and simplicity. Such a set works «out of the box», the keyboard knows nothing about relatively complex Bluetooth, pairing etc. The host may also know nothing about Bluetooth, USB support is enough. In addition there is no need for two-way communication: keyboard works as sender only, dongle as receiver; still, Bluetooth requires two-way communication even with keyboard or mouse. That’s why Bluetooth devices are more expensive than their non-bluetooth counterparts.

Bluetooth or not — how to tell? Bluetooth keyboard should have Bluetooth symbol on it and a button allowing it to pair with something other than attached dongle (example: with a laptop having internal Bluetooth adapter). In fact there is often no dongle in set. Bluetooth dongle reports to operating system as Bluetooth radio, while non-bluetooth keyboard dongle is recognized directly as a keyboard (HID device) connected to USB just like any wired USB keyboard. If your keyboard and dongle are Bluetooth devices, you have to pair them in every operating system you connect the dongle to, because Bluetooth keyboard (and any other Bluetooth device) pairs with the operating system via dongle, not with the dongle only. If given set works just by plugging the dongle, then it’s not Bluetooth.

In case you cannot tell whether you’ve got Bluetooth or non-bluetooth keyboard, name its model here so we could figure it out. If it is Bluetooth one and you need more help pairing speakers, I need to know your operating system before I guide you further.

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How to make a USB keyboard wireless

Finding the right keyboard for you is not easy. There are so many different types, layouts, ergonomic shapes, and brands to decide from that you may feel overwhelmed.

If you find a specific keyboard that seems to hit all of your needs but comes with some limitations, such as it needs to be plugged in, don’t lose hope. There is a way to make a USB keyboard wireless.

You don’t need to be an engineer, you don’t need any experience at all. Just time, patience, and willingness to learn. This article will cover everything you need to know about wired vs wireless keyboards and how one might go about transforming one into the other.

If you already have one of the various strain-related conditions caused by typing, then the relief from using an ergonomic wireless keyboard, like this one on Amazon, can be genuinely life-changing.

Another reason you may want to convert your keyboard into a wireless one is you have a great USB keyboard but there isn’t a wireless version. So you’ll just make your own.

Can you make a USB keyboard wireless?

Yes, it interestingly is possible to convert a USB keyboard into a wireless one. It takes a little time and patience, and the correct knowledge and tools, but it is certainly achievable. If you ensure that you follow the steps closely, and don’t rush, you should do just fine.

It is important to make sure that you do all of the altering whilst the keyboard is UNPLUGGED. Do not have it connected to a power source, or you’ll shock yourself. Potentially pretty badly.

There are some useful videos up on youtube about how to do this yourself if you feel a little lost. I looked up some to put in this article, here is an interesting one I found, but there are a lot more if you need a different solution: how to make a USB keyboard wireless

First, ensure that your keyboard is unplugged from your PC. You don’t want a shock, and you don’t want to accidentally break the PC. Take your keyboard to a well-lit table and set it down.

Next, you want to connect a USB-compatible microcontroller to the keyboard’s USB port. This can be done easily if there is a spare port. If there isn’t, you are going to need to unscrew the keyboard and unplug the cord from inside. This is easy enough, as most keyboards are held together with a handful of screws. Don’t lose any of the screws, as you’ll need them to put the keyboard back together.

Your USB-compatible microcontroller is what will allow your keyboard to talk to the computer. It does so by connecting with a sister microcontroller in one of your computer’s USB slots. Plug in this second microcontroller now.

Unfortunately, they are not capable of speaking to each other on their own. They have no way to send a signal. This is why you will need to purchase two radio transmitters for each device. This will send a signal from the keyboard to PC registering each keystroke.

The transmitters must transmit on the same frequency, or they will “ignore” each other. Most transmitters come pre-programmed to a specific frequency. If yours isn’t, you will want to set them both to 433.92 Mhz. As that is what is recommended by most manufacturers.

Once both microcontrollers and transmitters are inserted, calibrated to the right frequency, and have a power source you are good to go. Simply turn on your PC and start searching for devices. If you don’t see your keyboard on the list of devices, first try typing with the keyboard to see if that jump-starts it. If not, you might want to recalibrate the transmitters.

Ensure both the first number, 433, and the decimal (.92) are the same. Many people assume that being close enough will work. Just like with your car’s radio, if you are even a fraction off with the frequency you will pick up nothing but dead air. If 433.92 isn’t working for you, you can try a different, similar, frequency. So long as they are both the same.

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Convert USB keyboard to Bluetooth LE

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README.md

Convert USB keyboard to Bluetooth LE

Double click on the Trinket M0 reset. When the TRINKETBOOT USB drive appears, drag and drop the file KBDADVUARTUSBH.ino.trinket_m0.uf2 on the the drive. This programs to the Trinket M0 to act as a USB host for the keyboard. USB keyboard HID reports are send out the UART TX (4) pin. The source code is at https://github.com/gdsports/usbhostcopro.

USBKBDBLE receives HID reports via its UART RX and sends the reports out the BLE keyboard module.

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Convert USB keyboard to Bluetooth LE

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