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tobozo / ESP32-USB-Soft-Host

An Arduino wrapper to @sdima1357's usb_soft_host esp-idf example
GNU Affero General Public License v3.0
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Connection issue #4

Closed zbx-sadman closed 3 years ago

zbx-sadman commented 3 years ago

Hello.

I want to ask for schematic.

Do you put +5V on USB connector, and connect D+/D- directly to ESP32 pis (without voltage level shifter)?

I have tried connect some devices to ESP32 thru cheap 5V<->3.3V level shifter and have no success. Keyboard and one mouse with long cable (~1.4m) is not recognized, and another mouse with shorter cable (~0.8m) is unstable recognized .

Unfortunately i'm not sure about ESP32's pins 5V toolerance and i affraid to burn out microcontroller.

Thanks for your time.

tobozo commented 3 years ago

hey @zbx-sadman thanks for your feedback.

I don't use a level shifter but I haven't managed to get every mouse detected, looks like some models are using high speed usb for some reason.

Is your other mouse being unstable even when the keyboard isn't plugged in? If so you may try to power the USB separately (but keep the GND common).

ESP32 5v tolerance is a bliss, and burning an ESP32 is an achievement :-)

zbx-sadman commented 3 years ago

I tried other ( https://robotdyn.com/logic-level-converter-bi-direction-4channel.html ) level shifter based on BSS138 and have no success too with all my mouses/keyboards Then i maked direct connection between ESP32 and short-cabled mouse (M-UV55a) with all wires (5V/GND/D+/D-), and seen miracle:

image

Then i tested long-cabled Logitech B100 mouse, and Logitech K120 keyboard. All parts showed activity in the Serial Monitor. I guess that's is win.

May be later i'll return to this quest with oscilloscope.

Many thanks @tobozo and @sdima1357

zbx-sadman commented 3 years ago

Some good news.

I've tested voltage level on the DP/DM lines, and seems it good for the ESP32 inputs. I've seen 3.7v max on peak-peak metric ("Pk-pk" on oscilloscope screen).

DP line for example:

image