I also have a 2.4" rs6-21 display. It was used on Arduino before, but I would like to connect to a Pi 3, trouble is I am not sure which pin on the display goes to ehich gpio on the Pi. the pins on the dispay are in 4 groups. They are: //Group 1 LCD_RST LCD_CS LCD_RS LCD_WR LCD_RD // Group 2 LCD_D2 L...