Some wireless mini keyboards do work and others don't about usb_host_shield HOT 3 OPEN

I may or may not be able to help depending on what we are actually dealing with. But you can at least make it possible for those who could help provide you the help if you post actual information such as the outcome of running an enumeration example code and outcome of keyboard code, with any or all commented debug print lines enabled, and your expectation vs actual outcome. "Not working" isn't a technical term and doesn't convey any information necessary to fix your problem. The photo is a nice to have extra.

from usb_host_shield.

Thank you for being willing to collaborate. I have several keyboards like the ones I show in the image. They all work well with my computer and my smart TV, but only one works with the USB host shield. I am using an Arduino Uno and doing tests with several examples that included in the library
usbhidbootkbd, usbhidbootmouse, usbhidbootkbdandMouse.
The "Start" message always appears on the serial port regardless of whether you place a keyboard or another.

from usb_host_shield.

Only the keyboard works whose code is
ATV-I8, you can see the ascii codes corresponding to each key on the serial monitor... while on the others the message "START" appears and nothing else

NOTE:
Obviously each keyboard has its corresponding dongle.

from usb_host_shield.