Hello, Im trying yo design a project running on a WEMOS D1 R2 board (3.3V) which needs a text LCD
It could be either a 4x20 or a 2x20 LCD, but I can't use those tiny 0'96" ones
As the Wemos boards don't have too many Digital pins, I would need to use serial interfacing with the LCD (either SPI or I2C). I don't have enough available pins to drive the standard parallel LCD buses
Then I found those 4x20 LCD's that use a "backpack" (PCFxxxx) board that turns parallel into I2C, which look good but they all seem to work only at 5V, and all these Wemos boards run on 3.3v logic
Anone has dealt with this before??