Nextion preamble Startup/Ready in Program.s
As of Nextion Editor v1.65.0, the Nextion 10 bytes of power on preamble Nextion Startup 00 00 00 FF FF FF (NIS 7.19) and Nextion Ready 88 FF FF FF (NIS 7.29) have been moved from firmware into Program.s as a printh statement printh 00 00 00 FF FF FF 88 FF FF FF. This