Enable 2nd serial Port direct OctoPrint connection

This firmware change enabled the second serial port to directly connect to the RX/TX headers inside the case (usually used for the MKS WIFI module) to UART ports of a RaspberryPi running Octoprint. This should greatly increase the reliability of the connection. Aditionally some other features have been enabled that should increase performance of the printer.

ZNP_F401_Marlin-V_1.0.4/Marlin/Configuration.h

@@ -42,7 +42,7 @@
 //===========================================================================
 
 
-#define UI_VERSION "        V1_1.0.4"
+#define UI_VERSION "        V1_1.0.5.4"
 //#define UI_VERSION "        V1_1.0.3"
 
 /**
@@ -132,8 +132,8 @@
  * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
  * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
-//#define SERIAL_PORT_2 -1
-//#define BAUDRATE_2 250000   // Enable to override BAUDRATE
+#define SERIAL_PORT_2 2
+#define BAUDRATE_2 500000   // Enable to override BAUDRATE
 
 /**
  * Select a third serial port on the board to use for communication with the host.
@@ -1018,7 +1018,7 @@
  *
  * See https://github.com/synthetos/TinyG/wiki/Jerk-Controlled-Motion-Explained
  */
-//#define S_CURVE_ACCELERATION
+#define S_CURVE_ACCELERATION
 
 //===========================================================================
 //============================= Z Probe Options =============================

ZNP_F401_Marlin-V_1.0.4/Marlin/Configuration_adv.h

@@ -528,7 +528,7 @@
 // When first starting the main fan, run it at full speed for the
 // given number of milliseconds.  This gets the fan spinning reliably
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
-//#define FAN_KICKSTART_TIME 100
+#define FAN_KICKSTART_TIME 250
 
 // Some coolers may require a non-zero "off" state.
 //#define FAN_OFF_PWM  1
@@ -573,9 +573,9 @@
  *   PWM on pin OC2A. Only use this option if you don't need PWM on 0C2A. (Check your schematic.)
  *   USE_OCR2A_AS_TOP sacrifices duty cycle control resolution to achieve this broader range of frequencies.
  */
-//#define FAST_PWM_FAN    // Increase the fan PWM frequency. Removes the PWM noise but increases heating in the FET/Arduino
+#define FAST_PWM_FAN    // Increase the fan PWM frequency. Removes the PWM noise but increases heating in the FET/Arduino
 #if ENABLED(FAST_PWM_FAN)
-  //#define FAST_PWM_FAN_FREQUENCY 31400  // Define here to override the defaults below
+  #define FAST_PWM_FAN_FREQUENCY 120  // Define here to override the defaults below
   //#define USE_OCR2A_AS_TOP
   #ifndef FAST_PWM_FAN_FREQUENCY
     #ifdef __AVR__
@@ -842,11 +842,11 @@
 //#define SENSORLESS_BACKOFF_MM  { 2, 2, 0 }  // (mm) Backoff from endstops before sensorless homing
 
 #define HOMING_BUMP_MM      { 5, 5, 2 }       // (mm) Backoff from endstops after first bump
-#define HOMING_BUMP_DIVISOR { 3, 3, 3 }       // Re-Bump Speed Divisor (Divides the Homing Feedrate)
+#define HOMING_BUMP_DIVISOR { 3, 3, 1 }       // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 
 //#define HOMING_BACKOFF_POST_MM { 2, 2, 2 }  // (mm) Backoff from endstops after homing
 
-//#define QUICK_HOME                          // If G28 contains XY do a diagonal move first
+#define QUICK_HOME                          // If G28 contains XY do a diagonal move first
 //#define HOME_Y_BEFORE_X                     // If G28 contains XY home Y before X
 //#define HOME_Z_FIRST                        // Home Z first. Requires a Z-MIN endstop (not a probe).
 //#define CODEPENDENT_XY_HOMING               // If X/Y can't home without homing Y/X first
@@ -1035,10 +1035,10 @@
  * Set DISABLE_INACTIVE_? 'true' to shut down axis steppers after an idle period.
  * The Deactive Time can be overridden with M18 and M84. Set to 0 for No Timeout.
  */
-#define DEFAULT_STEPPER_DEACTIVE_TIME 0//120
+#define DEFAULT_STEPPER_DEACTIVE_TIME 120 //0
 #define DISABLE_INACTIVE_X true
 #define DISABLE_INACTIVE_Y true
-#define DISABLE_INACTIVE_Z true  // Set 'false' if the nozzle could fall onto your printed part!
+#define DISABLE_INACTIVE_Z false  // Set 'false' if the nozzle could fall onto your printed part!
 #define DISABLE_INACTIVE_I true
 #define DISABLE_INACTIVE_J true
 #define DISABLE_INACTIVE_K true
@@ -1179,7 +1179,7 @@
  * vibration and surface artifacts. The algorithm adapts to provide the best possible step smoothing at the
  * lowest stepping frequencies.
  */
-//#define ADAPTIVE_STEP_SMOOTHING
+#define ADAPTIVE_STEP_SMOOTHING
 
 /**
  * Custom Microstepping
@@ -1532,10 +1532,10 @@
 
   // Allow international symbols in long filenames. To display correctly, the
   // LCD's font must contain the characters. Check your selected LCD language.
-  //#define UTF_FILENAME_SUPPORT
+  #define UTF_FILENAME_SUPPORT
 
   // This allows hosts to request long names for files and folders with M33
-  //#define LONG_FILENAME_HOST_SUPPORT
+  #define LONG_FILENAME_HOST_SUPPORT
 
   // Enable this option to scroll long filenames in the SD card menu
   //#define SCROLL_LONG_FILENAMES
@@ -3738,7 +3738,7 @@
 /**
  * Auto-report position with M154 S<seconds>
  */
-//#define AUTO_REPORT_POSITION
+#define AUTO_REPORT_POSITION
 
 /**
  * Include capabilities in M115 output
@@ -3821,7 +3821,7 @@
 //#define MEATPACK_ON_SERIAL_PORT_1
 //#define MEATPACK_ON_SERIAL_PORT_2
 
-//#define GCODE_CASE_INSENSITIVE  // Accept G-code sent to the firmware in lowercase
+#define GCODE_CASE_INSENSITIVE  // Accept G-code sent to the firmware in lowercase
 
 //#define REPETIER_GCODE_M360     // Add commands originally from Repetier FW
 
@@ -3969,7 +3969,7 @@
  * Host Prompt Support enables Marlin to use the host for user prompts so
  * filament runout and other processes can be managed from the host side.
  */
-//#define HOST_ACTION_COMMANDS
+#define HOST_ACTION_COMMANDS
 #if ENABLED(HOST_ACTION_COMMANDS)
   //#define HOST_PAUSE_M76
   //#define HOST_PROMPT_SUPPORT