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Documents Community Feedback 13: Wireless Mini Keyboard Hack for RPi
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  • Author Author: tariq.ahmad
  • Date Created: 30 Jan 2018 3:22 AM Date Created
  • Last Updated Last Updated: 18 Jan 2019 4:13 PM
  • Views 1579 views
  • Likes 5 likes
  • Comments 4 comments
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Community Feedback 13: Wireless Mini Keyboard Hack for RPi

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Ben and Karen discuss what it would take disable the wireless functionality in a mini keyboard, such as the ones typically paired with a Raspberry Pi, so that it can be integrated into your electronics projects. The reason you would want to disable the wireless functionality is to conserve battery consumption.

 

 

old_doc is interested in re-purposing a wireless keyboard and possibly hardwiring it to an electronics project. To help him, he's wondering if Ben is interested in doing a teardown and analysis of a similar mini keyboard. He sees a mini keyboard teardown as a solution for anyone interested in building handheld projects that also preserve battery through the removal of wireless functionality. old_doc wants to build a mini computer into the case of a first generation Nintendo DS. He wants to wire a mini keyboard to his ASUS tinkerkit as the final step.

Ben and Karen wired a similar keyboard inside the Raspberry Pi Photo Booth that they recently built. Ben recalls a project where he hacked up an Xbox 360 chat pad so that it attached to the game controller. The chat pad consisted of a Microchip Pic microcontroller and keyboard matrix so there was no wireless. It was incredibly simple, so he suggests that it might be possible to start out with something similar and build up from there. However, if you were to go that route, you'd be losing all the function keys, control-alt-delete, and stuff you need for a modern computer.

It's possible that they could do a teardown of a mini keyboard to see if they could remove the wireless functionality and make it as battery saving as possible. Or, they could hook up another microcontroller to it and just make their own keyboard.  To determine which approach is best, they would need to first plug the keyboard into a board and check the battery consumption to see if it's still utilizing wireless or it it just switches over to USB power once its plugged in.  If you could tap into the matrix of the keyboard then you could use the buttons and address them yourself using a microcontroller. That way you would know exactly what’s going on and not have to worry about using the wireless functionality. If the keyboard either uses a separate wireless module this could be a solution but if the microcontroller is the wireless module then you can’t disable one without destroying the other.  If they were to do a teardown then they would need to take a couple of different modules to see what works.  

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Top Comments

  • rivera82falcon
    rivera82falcon over 7 years ago in reply to makerkaren +2
    Thank you! I'll take anything over nothing and seeing this does motivate me in the right direction.
  • rivera82falcon
    rivera82falcon over 7 years ago +1
    This is actually an interesting idea and refreshing as opposed to "hey, make this portable...and that too...and make my fridge portable too!!!" You mentioned in this video that you used the Microsoft Chatpad…
  • woodworker
    woodworker over 7 years ago +1
    There is either the XBOX Chatpad where the Protocoll is reverse engineered, so no need to flash an IC http://cliffle.com/project/chatpad/protocol/ http://cliffle.com/project/chatpad/pinout/ Or there is…
  • rivera82falcon
    rivera82falcon over 7 years ago in reply to makerkaren

    Thank you! I'll take anything over nothing and seeing this does motivate me in the right direction.

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  • makerkaren
    makerkaren over 7 years ago in reply to rivera82falcon

    Hi Joe,

    Ben said he used the Microsoft Chatpad in this project, Episode 49: See Ben Heck's Pocket Computer Episode . Doesn't look like there are any design files to go along with it, sadly.

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  • woodworker
    woodworker over 7 years ago

    There is either the XBOX Chatpad where the Protocoll is reverse engineered, so no need to flash an IC

     

    • http://cliffle.com/project/chatpad/protocol/
    • http://cliffle.com/project/chatpad/pinout/

     

    Or there is also the Option of the Blackberry Q10 Keyboard

    • https://github.com/arturo182/BBQ10KBD
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  • rivera82falcon
    rivera82falcon over 7 years ago

    This is actually an interesting idea and refreshing as opposed to "hey, make this portable...and that too...and make my fridge portable too!!!" You mentioned in this video that you used the Microsoft Chatpad in previous projects but I don't remember which one. What projects and is there a write up for this or videos with details on what was done to the pad?

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