Issue with Teensy LC & Raspberry Pi

[cpmender]

I am attempting to create my own handheld Retropie device. Retropie works fine with any controller on my Raspberry Pi 4 (4 GB). I am attempting to use a Teensy LC however, I have attempted using several different code repos. Including the example File>Teensy>UBS_Joystick>Complete code. They all work when I test on joy.cpl but when I connect the Teensy to the Raspberry Pi, RetroPie is stuck on the Press and Hold A button screen. Nothing will register.

My Setup is:
Board: Teensy LC
USB Type: Serial + Keyboard + Mouse + Joystick
Port: I have tried both Teensy Port & Serial Port

I am stuck as to why this works in the joy.cpl test but nothing happens in RetroPie.

I would appreciate any help.

Thanks.

[mitu]

Is your device recognized as a gamepad ? Run cat /proc/bus/input/devices and see if it's listed as a gamepad/joypad.

[cpmender]

@mitu said in Issue with Teensy LC & Raspberry Pi:

cat /proc/bus/input/devices

It does not appear so. I received an array of 3 items. However they all appear to be my Apple Extended USB Keyboard.

How can I get the raspberry pi to recognize my teensy as a gamepad?

[mitu]

@cpmender said in Issue with Teensy LC & Raspberry Pi:

How can I get the raspberry pi to recognize my teensy as a gamepad?

Usually the device should advertise itself as a joystick input device or a driver would recognize it and configure it. Did you install any driver ?
Post the output of the cat command here - run it with only the device plugged in.

[cpmender]

Okay so I figured out what was going on. I had two micro-usb cords, one was connected to my RaspberryPi and one to my laptop. The issue was with my micro-usb to the RaspberryPi, it was powering the Teensy LC but not reading it.

I switched the cords and it started working on the RaspberryPi.

You can imagine how frustrated I was, given I am new to all this.

Thanks for your help Mitu!