Unable to deal with more than 2 controllers in a single sketch

[guillaumeparent]

Description of Issue

As stated in the title, I am unable to create a sketch able to set more than 2 controllers. The discussion started in Mathiew's blog.

To summarize, I manage to create sketches dealing with 2 controllers, but as soon as I try to deal with more than 2 controllers only the 2 first ones are properly defined.

I attach in the following a minimal reproducible example attempting to define 4 controllers with 1 button each. As one can see on the attache picture, only the 2 first (0x10 and 0x11) controllers are properly detected. The 2 last ones (0x12 and 0x14) are not. The axis are recognized as buttons only.

Technical Details

• Arduino Board: Arcuino Micro and Arduino Pro Micro:
• Host OS: MacOS (Catalina)
• Arduino IDE Version: 1.8.19
• Joystick library version: 2.0.7

Sketch File that Reproduces Issue

#include <Joystick.h>

#define NbrGamePad 4

Joystick_ Joystick[NbrGamePad] = {
Joystick_(0x10, JOYSTICK_TYPE_GAMEPAD, 1, 0, true, true, false, false, false, false, false, false, false, false, false),
Joystick_(0x11, JOYSTICK_TYPE_GAMEPAD, 1, 0, true, true, false, false, false, false, false, false, false, false, false),
Joystick_(0x12, JOYSTICK_TYPE_GAMEPAD, 1, 0, true, true, false, false, false, false, false, false, false, false, false),
Joystick_(0x13, JOYSTICK_TYPE_GAMEPAD, 1, 0, true, true, false, false, false, false, false, false, false, false, false)
};

void setup() {
// put your setup code here, to run once:

}

void loop() {
// put your main code here, to run repeatedly:

}

Wiring Details

Any pin wiring details that may be relevant.

Additional context

Add any other context about the problem here.

[MHeironimus]

The sketch file above appears to work correctly on Windows 10. It may be a MacOS issue.

For example:

First Controller:

Fourth Controller:

The second and third look the same.

I know Linux machines need an adjustment to work correctly if more than one controller is defined (see https://github.com/MHeironimus/ArduinoJoystickLibrary/wiki/FAQ#linux-support for more details). Maybe there is something equivalent for the Mac.

[guillaumeparent]

It may be a MacOS issue

That's what I think too know I have confirmation my sketch works under Windows.

I know Linux machines need an adjustment to work correctly if more than one controller is defined

I saw that on your blog but I did not pay attention to it since my scrip works for 2 controller. I'll give it a try tho.

I'll try to compile my sketch under Windows and see if my full script works. Then i'll try to solve the problem under MacOS.

Thank you a lot for the help.

[guillaumeparent]

Ok, I found the problem. It was indeed the issue mentioned here. I tested the method on a Raspberry Pi (on which I experienced the same 2 controller limitation) and it worked. Now I can see 4 controllers.

Thank you for the help !