Yeah I have. It seems to involve a lot of bit-shifting and logical bit manipulation which is going to take me a long time to get my head around.
There are two issues to resolve as far as I can tell.
This display uses different data addresses for the display text and different control commands for fuctions.
This display uses two i2c addresses, one to control the display, the other to control the backlight. I started here because the commands for backlight control are very simple and if I can get that working I’ll be on the way to getting the display working. However, I spent a long time trying to figure out how one esphome component could have two i2c addresses, and didn’t get any further. Is this possible? Or would it have to be created as two components, one for the character display and one for the RGB backlight control?
Yes I think you need 2 components, a light and a display.
The lcd may indeed may be a hd44780, but there is more to it than that. The hd44780 id not an i2c device, so there is something else doing the i2c to parallel conversion.
It may be lcd_pcf8574. But if you have one, it’ll probably say.