Teensy 3.2 USB Keyboard Controller

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eliamady

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Hi everyone,

I recently made a USB keyboard controller following the excellent guide by Frank Adams https://www.instructables.com/How-to-Make-a-USB-Laptop-Keyboard-Controller/ and it works great. I used a keyboard membrane from an old eeePC netbook.

The keyboard works very well with a Windows PC (I tried three laptops) and have also got it working with the Raspberry Pi. It does take a few seconds to get recognised at first but is seamless after that.

I then tried to use it with a Micromite computer (a wonderful retro feel computer, https://geoffg.net/maximite.html) but alas, the CMM2 does not recognise the USB Teensy keyboard. Seems to me something is missing during the USB handshake. A normal external USB keyboard works fine with the CMM2 but not the Teensy one. My question is, what is the difference in the USB initial protocol between a standard USB keyboard and a Teensy controlled one? Why is one recognised and the other not?

Any suggestions/ideas as to what I can check/try to get it working please?

I am using Arduino 1.8.13 IDE and Teensyduino 1.53. I compiled the keyboard as a HID Keyboard only.

Thanks in advance
Elia
 
Hello again,

No suggestions or ideas anyone? I am really stuck with this and would greatly appreciate any assistance to get it working please

Thanks,
Elia
 
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