Try a shorter USB cable.

Just to solve the above little puzzle:

- SS stands for slave select, which is equal to CS (chip select)
- INT stands for interrupt, and it's not part of the SPI standard definition

It means I can use pre-defined pins GPIO10 - GPIO13 for SPI, and GPIO14 becomes interrupt pin by driver definition.

Thanks. So I think I can order that USB host shield now, because it's compatible with ESP32-S2.

Then I'll have a deeper look at the driver to create proper wiring. I'll report results or problems after this.

Update: I figured out that it's way too complex to deal with raw USB data. The software from Retrokits doesn't help here. New approach: - connect your MIDI controller (USB device mode) to a USB host shield hardware (USB host mode) - connect that host shield to ESP32-S2 (SPI interface) - the ESP32-S2...

Hi, I currently use ESP32-S2 as USB device (GPIO19 and GPIO20). This works fine (detected as USB-MIDI device on my PC). Now I also want USB host capabilities. So I want to connect this USB host controller by SPI: https://www.ebay.de/itm/234532559207?hash=item369b3ad967:g:h~IAAOSwWRdibMd6 . It should...

@Marios
These instructions work for C3 and S2. After installation you have to select each board separately to program it.
https://docs.espressif.com/projects/ard ... installing

@johnfrancisbarjols
Then your chip isn't supported yet. ESP32 on Arduino is pretty new. You can:
- buy an S2 or C3, who already have Arduino support
- use the command line tool esp-idf

@johnfrancisbarjols
You don't have that chip. "ESP32-S2" has to be written on the chip.
Select the right chip on the board manager.

In case you've been updated from an older ESP32 board library, uninstall the older version by using a file manager. Look at /home/user/.arduino15/packages/esp32/hardware/esp32 . Maybe you still have the old RC version. Just delete that folder. Also there are different board software variants availab...

After some more research, here is my current approach: The Retrokits company offers the smart MIDI cable RK-002, which is basically a MIDI-DIN cable with a built-in MC. They support Arduino, installation instructions are here: https://retrokits.com/rk002-duy/ RK-002 code for different MIDI processin...