#define Z_PROBE_Z_OFFSET 0

* changed #define EXT0_JAM_PIN -1 to 42 in configuration.h

 #define  _SET_OUTPUT(IO)  do {DIO ##  IO ## _DDR |=  MASK(DIO ## IO ## _PIN); } while (0)

#define ENDSTOP_PULLUP_X_MIN true

#define X_MAX_LENGTH 350

#define ENDSTOP_PULLUP_X_MIN true

#define MICROSTEP_MODES { 16,16,16,8,8 }

 #define UI_ERROR_UPD(status) {uid.setStatusP(PSTR(status),true);uid.refreshPage();}

#define Z_PROBE_HEIGHT 1

#define CUSTOM_LOGO

#define Z_PROBE_Z_OFFSET 0

#define CONFIGURATION_H

#define UI_DISPLAY_RS_PIN _BV(4)

I am putting together my Prusa i3 and when I change #define FEATURE_CONTROLLER 0 to something other than zero, it will not compile. I have Arduino 1.6.7 and I believe I have Protocol Version 1.0. I am

#define X_STEP_PIN         17        13

I've found the problem - it's #define ZHOME_HEAT_HEIGHT 20. My probe is much lower

#define Z_PROBE_Z_OFFSET 0

When I set  : #define EXT0_TEMPSENSOR_TYPE 102 (the MAX31855)

for 18 and nothing found. I tryed to use:#define Z_PROBE_PIN 18

First you seem to like to measure from top. That is quite risky depending on target position. In any case you should set #define ENDSTOP_Z_BACK_ON_HOME 20