esp-idf-ssd1306/MouseSelectDemo

MouseSelectDemo for SSD1306

Demo of selecting characters using the mouse.
I used this as a reference.

Hardware requirements

• ESP32S2/S3
  These have USB-HOST functionality.

• USB Connector
  I used this:
  

• USB mouse
  2-button or 3-button usb mouse.
  Button 2/3 is not used in this project.

USB wiring

To stabilize the power supply, I placed a 100uF electrolytic capacitor between 5V and GND.

ESP32-S2/S3 BOARD           USB CONNECTOR
                            +--+
    [  5V   ]  +--------->  | || VCC
    [GPIO 19]  |--------->  | || D-
    [GPIO 20]  |--------->  | || D+
    [  GND  ]  |--------+>  | || GND
               |        |   +--+
               +---||---+
                  100uF

USB hot socket

There are times when it works correctly and times when it doesn't.
It works more stably if you connect before starting the firmware.
When it works correctly, a log like this will be displayed.

I (1166) usb_hid: hid_host_device_callback
I (1166) usb_hid: HID Device, protocol 'MOUSE' CONNECTED

Using USB-HUB

I tried it, but it doesn't work properly via USB-HUB.

Transfer failed error

For some reason, the following error may occur in rare cases.
This error occurs within this component.
It is unclear whether it is a component bug or an effect of electrical noise.
Some kind of stabilization circuitry may be required.
It may come back to life if you unplugging the mouse and plugging it again.
I would like to hear the opinion of someone who is familiar with USB electrical circuits.

E (12287696) hid-host: Transfer failed, status 1
E (12287696) usb_hid: HID Device, protocol 'MOUSE' TRANSFER_ERROR
E (15953516) USBH: Device 1 gone

Keyboard with mouse function

I have a keyboard with mouse functionality, but the keyboard with mouse functionality does not work as a mouse.
See here.