Sorry for the rant. I am still struggling with coding LCD for my VNA. The latest by KeDei seems to have odd SPI hardware. The SPI MOSI signal is passed thru cascaded shift registers , consequently the "standard" ILI9341 LCD controller commands / data instead of single character are wrapped into 4 character array. Of course there is no visible documentation explaining this scheme, only some ancient C code. This funky scheme must be how KeDei switches the ILI9341 controller chip from command to data. 73 Shirley PS Unless you have an idea or interested about how this shift register scheme works, no reply necessary.