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Forum Index : Microcontroller and PC projects : Keyboard complaints with CMM2

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CircuitGizmos

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Joined: 08/09/2011
Location: United States
Posts: 1421
Posted: 01:45pm 30 Jul 2020
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The #1 complaint that I get from customers is that their keyboard doesn't work. I suggest that they update firmware and try some more keyboards. One saying "It looks like CMM2 supports very limited range of keyboards."

That customer provided a list of working and non-working models, which I copy here:

Following keyboard works:
- Logitech Wireless K270
- Logitech Wireless K800

Didn’t work on following models:
- Logitech Wireless K410
- Wired Raspberry Pi keyboard

Perhaps this thread can list keyboard successes and failures by type/model to help other people out.
Micromites and Maximites! - Beginning Maximite
 
matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 8579
Posted: 01:52pm 30 Jul 2020
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The manual clearly says that keyboards with mouse function (i.e. touchpads) won't work

Logitech Wireless K410

and that hubs won't work

Wired Raspberry Pi keyboard (has a built in hub!!!!!)

This is not solvable. The ST USB stack does not support hubs - FULL STOP
 
CircuitGizmos

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Joined: 08/09/2011
Location: United States
Posts: 1421
Posted: 02:00pm 30 Jul 2020
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People will not RTFM. Or just miss things (I know that I have).

At least a list here can be linked to directly and with information in two places it is 47.6% (I did the math    ) more likely that it will be found.
Micromites and Maximites! - Beginning Maximite
 
matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 8579
Posted: 02:03pm 30 Jul 2020
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Suggest you attach a sticker to CMM2 that you ship:

  Quote  Keyboards with any sort of mouse functionality e.g. trackpad, or with USB outlets will not work as they contain a USB hub which is not and cannot be supported
 
mclout999
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Joined: 05/07/2020
Location: United States
Posts: 430
Posted: 02:06pm 30 Jul 2020
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  CircuitGizmos said  The #1 complaint that I get from customers is that their keyboard doesn't work. I suggest that they update firmware and try some more keyboards. One saying "It looks like CMM2 supports very limited range of keyboards."

That customer provided a list of working and non-working models, which I copy here:

Following keyboard works:
- Logitech Wireless K270
- Logitech Wireless K800

Didn’t work on following models:
- Logitech Wireless K410
- Wired Raspberry Pi keyboard

Perhaps this thread can list keyboard successes and failures by type/model to help other people out.


it was answered as I typed so this was redundant but I can not figure out how to delete it!!!!
Edited 2020-07-31 00:12 by mclout999
 
Atomizer_Zero
Senior Member

Joined: 04/07/2020
Location: United Kingdom
Posts: 134
Posted: 02:26pm 30 Jul 2020
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I have one of these

https://www.amazon.co.uk/Rii-Mini-Bluetooth-Wireless-Keyboard-Black/dp/B010WMB6DK/ref=sr_1_3?dchild=1&keywords=rii+mini+i8%2B&qid=1596119132&sr=8-3

which has a mouse functionality, and it works fine, surprisingly! lol

EDIT: URL linking button is broken xD it was duplicating my text and putting extra /url in lol
Edited 2020-07-31 00:28 by Atomizer_Zero
 
matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 8579
Posted: 02:42pm 30 Jul 2020
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  Quote  which has a mouse functionality, and it works fine, surprisingly!


There are some that do because they don't implement the "mouse" via a hub, or the keyboard somehow bypasses the hub, seems to be specifically some type of cheap wireless, but the advice has to be don't buy and expect to work a keyboard with hub or mouse functionality.
 
mclout999
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Joined: 05/07/2020
Location: United States
Posts: 430
Posted: 03:16pm 30 Jul 2020
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  Atomizer_Zero said  I have one of these

https://www.amazon.co.uk/Rii-Mini-Bluetooth-Wireless-Keyboard-Black/dp/B010WMB6DK/ref=sr_1_3?dchild=1&keywords=rii+mini+i8%2B&qid=1596119132&sr=8-3

which has a mouse functionality, and it works fine, surprisingly! lol

EDIT: URL linking button is broken xD it was duplicating my text and putting extra /url in lol


Cool I have 2 of those for Android TV boxes (Nvidia Shield TVs. mostly).  I will try them out.  I wish this thing had Bluetooth. Well actualy I wish it could have hubs and mouse suport but that not posable unless they add that to the usb stack.
 
WhiteWizzard
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Joined: 05/04/2013
Location: United Kingdom
Posts: 2794
Posted: 05:45pm 30 Jul 2020
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Logitech K400+ is my keyboard of choice for the CMM2.

It is a nice compact Wireless Keyboard with a very nice feel to keypresses. Costs around £30 on amazon and is available in black (dark grey!) or white.

Note that it does have a glide pad (which is effectively redundant) - just confirming it DOES work.
For everything Micromite visit micromite.org

Direct Email: whitewizzard@micromite.o
 
mxck
Newbie

Joined: 30/07/2020
Location: New Zealand
Posts: 9
Posted: 10:34pm 30 Jul 2020
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I had a similar experience with my K750 solar powered logitech wireless keyboard using the logitech unified receiver. It was working to an extent, but seemed to pick up every other keypress or so. So I went and bought a cheaper wired keyboard, feels like it deserves its own dedicated keyboard anyway.
 
capsikin
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Joined: 30/06/2020
Location: Australia
Posts: 341
Posted: 12:09am 31 Jul 2020
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  matherp said  
  Quote  which has a mouse functionality, and it works fine, surprisingly!


There are some that do because they don't implement the "mouse" via a hub, or the keyboard somehow bypasses the hub, seems to be specifically some type of cheap wireless, but the advice has to be don't buy and expect to work a keyboard with hub or mouse functionality.


I didn't even know that was possible. USB is so complicated.
 
TassyJim

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Joined: 07/08/2011
Location: Australia
Posts: 5903
Posted: 12:34am 31 Jul 2020
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  capsikin said  
  matherp said  
  Quote  which has a mouse functionality, and it works fine, surprisingly!


There are some that do because they don't implement the "mouse" via a hub, or the keyboard somehow bypasses the hub, seems to be specifically some type of cheap wireless, but the advice has to be don't buy and expect to work a keyboard with hub or mouse functionality.


I didn't even know that was possible. USB is so complicated.


A wired combo device is likely to incorporate a hub.

A wireless device might work by making 2 connections to the wireless receiver. This is how separate mice and keyboards work.
Logitech claim you can have up to 6 devices connected to the one receiver with their latest offering.
I wouldn't like to try more than one device at a time with the CMM2 but it does appear that the mouse/trackpads don't get in the way when they use a second wireless connection.

Just be thankful that the keyboards don't need some silly Windows software to make them work. That is likely to be the case as they try and get 'clever'.

Jim
VK7JH
MMedit   MMBasic Help
 
bigmik

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Joined: 20/06/2011
Location: Australia
Posts: 2870
Posted: 02:31am 01 Aug 2020
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Hi All,

I don't know if someone is compiling a list of known working and non working keyboards for the CMM2 but these are my trials.

I have tested all of my keyboards that I had on hand, here is my testing list.

  Working        
 HP sk2885          
 Cherry              
 Microsoft 600
 no-name slim white
 HP ku0316
 no name mini ds3000
 no name mini R260


Not Working
 No Name k670 backlit
 Dell sk815
 No Name BIG Hi-Vis Yellow buttons


So out of 10 keyboards 3 didn't work and 7 did.


Kind Regards

Mick
Mick's uMite Stuff can be found >>> HERE (Kindly hosted by Dontronics) <<<
 
BobD

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Joined: 07/12/2011
Location: Australia
Posts: 935
Posted: 03:16am 01 Aug 2020
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I have two working keyboards

Havit HV-KB390L from https://www.prohavit.com/products/hv-kb390l-low-profile-mechanical-keyboard/
and a no name mechanical switches colour back light from Amazon
Both are Ten Key Less.
 
shaputer
Newbie

Joined: 25/07/2020
Location: United States
Posts: 38
Posted: 06:10pm 15 Aug 2020
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BigMik --- I bought a genuine Microsoft 600 wired keyboard and it doesn't work on my CMM2 board.  None of the several keyboards I already have work with it either.  Originally when I bought my board it worked with a wired Dell keyboard and then I plugged in a wireless Logitech keyboard and it work for a couple of short uses of the board and now NO keyboard has worked since and the time on the board is always incorrect.  I set both the time and the date before the keyboards stop working.  I have uploaded the firmware version 5.05.04 several times with no results.

I would appreciate any help from anyone because at this point I paid $100 for a board that's a paperweight.  Please help      

Out of desperation I tried the Beta version of the firmware CMM2V5.05.05b9.
The only change is that the time is now correct on the board, but the keyboard still doesn't work.
Edited 2020-08-16 04:29 by shaputer
If what you are doing is bringing out the worst in you than stop doing it.
 
matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 8579
Posted: 06:38pm 15 Aug 2020
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Check voltage on the switch pad - sounds like low power to the keyboard - what are you using to power the board?
 
Womble

Senior Member

Joined: 09/07/2020
Location: United Kingdom
Posts: 267
Posted: 07:33pm 15 Aug 2020
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I use a Logitech K120 (UK layout) at the moment.
A basic wired keyboard but fairly nice to type on, and only costs around £10-£13
 
Womble

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Joined: 09/07/2020
Location: United Kingdom
Posts: 267
Posted: 07:47pm 15 Aug 2020
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  shaputer said  I would appreciate any help from anyone because at this point I paid $100 for a board that's a paperweight.  Please help

Are you using a kit build, or prebuilt CMM2 ?

With a multimeter measure the DC voltage between the USB-B case (-ve) and the power switch (+ve)... it should be at or around 5v.  On a kit build you can also check the voltages at the 5VIN and 3.3V pins on the Waveshare.

Try a different USB-A to USB-B cable  I had loads of problems caused by an out of spec USB cable powering my CMM2.  Drove me nuts.  All for a simple cable !!!!
and yes it caused keyboard problems  

Regards

Womble
Edited 2020-08-16 05:54 by Womble
 
shaputer
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Joined: 25/07/2020
Location: United States
Posts: 38
Posted: 08:46pm 15 Aug 2020
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............... Drove me nuts.  All for a simple cable !!!!
and yes it caused keyboard problems  

Regards

Womble

THANKS SO MUCH !!!!  Fixed the problem.  All keyboards work now and the time is correct.        Mine was prebuilt.
Edited 2020-08-16 06:47 by shaputer
If what you are doing is bringing out the worst in you than stop doing it.
 
BobD

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Joined: 07/12/2011
Location: Australia
Posts: 935
Posted: 09:49pm 15 Aug 2020
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This project uses USB 2 for connectivity. USB 2 has a design upper limit specification of 500 milli-Amps. Although I think many PC attached devices can pull more without problems, 500mA should be adquate for most cmm2 and a normal keyboard (if necessary, turn the keyboard LEDs off).

However, there are many small usb 2 attached gadgets that you can buy only use as much as 100mA. They may also have cables which can manage this but not much more. As we have found out, 2 people (Womble and shaputer) have suffered from cables which couldn't carry enough current or were defective.

There is a method in the cmm2 manual that tells how to check if your current (mA) consumption is high and in a post above, Womble mentions how to check your voltage. If your current use is high then your voltage could be low and then things may cease to operate well or not at all and the symptoms could be quite weird. If you use plug-packs (aka wall worts) for power then make sure they have sufficent current (mA) capacity (read the label) and they can also go defective.

I didn't have any suitable cables and had to buy in cables for this project. Don't just have one. Always have spares for trouble shooting as they can go defective at any time. Also as Rob Rozee recently noted, some cables are magnetic. They use iron (steel) instead of copper which may limit their capacity.
 
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