Arduino for STM32

[SOLVED] !!!!!!

Sorry I found the issue! NO comment !!!

I had a doubt, since the connections are all correct and then I tried to adjust the contrast with the potentiometer on the back of the display...
and the writing appeared! incredible that by default the setting was wrong!!

Thank you all so ...

one bit more: of course I added lcd.setCursor(0,0); but
...nothing

Hello guys, I tried with 4.7Khom pullup resistors and 3.3V (or +5V) but nothing...
it does not work ... let's say: backlight/nobacklight commands work fine but no cursor and no text.


Can anyone help me please?
thanks and regards

Hello thanks for your feedback.
ok I'll try with 3.3V and with 4.7Kohm pullup.
unfortunately I don't see any cursor in my test .

anyway I'll let you know.
thanks and regards

Hello expert,
sorry for the inconvenience but I just can't drive a common 16x2 LCD (the one we can find on the web for a few euros).
The interface is I2C and the board in use is the F401RE.
Although the I2C scanner correctly detects the hardware address of the LCD (0x27) and although the backlight ...