4 and 11 are both reprap displays. But one is 20x4 chars (4) and the other is 128x64 pixel(11). Just search in configuration.h for the #define FEATURE_CONTROLLER line and replace 4 with 11 when you wa

#define _VARIANT_ARDUINO_STM32_

OK I'm one step closer now.. I had #define ZPROBE_ADDRESS before IOEndstopZMin was defined.

#define Z_PROBE_MIN_TEMPERATURE 150

#define CONFIGURATION_H

#define ZPROBE_ADDRESS &IOEndstopZMin

#define NUM_TOOLS 2

   27 | #define CONFIG_VARIABLE_EQ(tp, name, values) tp name = values;

#define INVERT_X_DIR 0

#define DRIVE_SYSTEM 3

#define NUM_TOOLS 1

#define X_HOME_DIR 1

#define X_MIN_PIN -1

#define BLUETOOTH_SERIAL -1

#define X_ENABLE_ON 0

#define AUTO_REPORT_POSITION

#define CONFIGURATION_H

= skr_mini_e3_v2_0 in platform.io and #define MOTHERBOARD MOTHERBOARD_E3_MINI_V2_0 in Configuration.h, I had compile failure:

#define ENDSTOP_Z_BACK_ON_HOME 0.0

#define MOTHERBOARD BOARD_TT_OSCAR