One detail about most of these character displays: they need to be powered from 5 V. If you power them from 3.3 V, it's likely that the backlight won't work. They typically work with 3.3 V logic, but 5 V power.
A very few of them are 3.3 V power and logic. They're usually labelled as such.
I do recommend the i2c adapter type, typically a PCF8574 chip. I haven't used any C libraries with these, but here's one that might work: gavinlyonsrepo/HD44780_LCD_PCF8574_PICO: Library to support the HD44780 LCD , (I2C PCF8574 "backpack" interface) for the RPI PICO RP2040 C++ SDK
A very few of them are 3.3 V power and logic. They're usually labelled as such.
I do recommend the i2c adapter type, typically a PCF8574 chip. I haven't used any C libraries with these, but here's one that might work: gavinlyonsrepo/HD44780_LCD_PCF8574_PICO: Library to support the HD44780 LCD , (I2C PCF8574 "backpack" interface) for the RPI PICO RP2040 C++ SDK
Statistics: Posted by scruss — Mon Apr 29, 2024 12:46 am