From 209fadd2e6039e050e33eaed9c59465ffa5c30f0 Mon Sep 17 00:00:00 2001
From: jaysuk <github@jayuk.org>
Date: Sat, 26 Aug 2023 00:43:57 +0100
Subject: [PATCH] =?UTF-8?q?=E2=9C=A8=20Mellow=20Fly=20E3=20V2=20(STM32F407?=
 =?UTF-8?q?VG)=20(#26081)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 Marlin/src/core/boards.h                      |   1 +
 Marlin/src/pins/pins.h                        |   2 +
 Marlin/src/pins/stm32f4/pins_CREALITY_F401.h  |   2 +-
 .../src/pins/stm32f4/pins_MELLOW_FLY_E3_V2.h  | 521 ++++++++++++++++++
 .../pins/stm32h7/pins_BTT_OCTOPUS_MAX_EZ.h    |   2 +-
 ini/stm32f4.ini                               |  19 +
 6 files changed, 545 insertions(+), 2 deletions(-)
 create mode 100644 Marlin/src/pins/stm32f4/pins_MELLOW_FLY_E3_V2.h

diff --git a/Marlin/src/core/boards.h b/Marlin/src/core/boards.h
index 5e404fc8504..0c27fbbe25b 100644
--- a/Marlin/src/core/boards.h
+++ b/Marlin/src/core/boards.h
@@ -459,6 +459,7 @@
 #define BOARD_CREALITY_F401RE         5245  // Creality CR4NS200141C13 (STM32F401RE) as found in the Ender-5 S1
 #define BOARD_BLACKPILL_CUSTOM        5246  // Custom board based on STM32F401CDU6.
 #define BOARD_I3DBEEZ9_V1             5247  // I3DBEEZ9 V1 (STM32F407ZG)
+#define BOARD_MELLOW_FLY_E3_V2        5248  // Mellow Fly E3 V2 (STM32F407VG)
 
 //
 // ARM Cortex-M7
diff --git a/Marlin/src/pins/pins.h b/Marlin/src/pins/pins.h
index fe356520d8f..48405335ef2 100644
--- a/Marlin/src/pins/pins.h
+++ b/Marlin/src/pins/pins.h
@@ -804,6 +804,8 @@
   #include "stm32f4/pins_BLACKPILL_CUSTOM.h"        // STM32F4                              env:STM32F401CD_blackpill_stlink
 #elif MB(I3DBEEZ9_V1)
   #include "stm32f4/pins_I3DBEEZ9.h"                // STM32F4                              env:I3DBEEZ9_V1
+#elif MB(MELLOW_FLY_E3_V2)
+  #include "stm32f4/pins_MELLOW_FLY_E3_V2.h"        // STM32F4                              env:FLY_E3_V2
 
 //
 // ARM Cortex-M7
diff --git a/Marlin/src/pins/stm32f4/pins_CREALITY_F401.h b/Marlin/src/pins/stm32f4/pins_CREALITY_F401.h
index f4b5b7d96a7..b4c5bad0938 100644
--- a/Marlin/src/pins/stm32f4/pins_CREALITY_F401.h
+++ b/Marlin/src/pins/stm32f4/pins_CREALITY_F401.h
@@ -140,7 +140,7 @@
 //#define LED_CONTROL_PIN                   PA7
 
 //
-// WiFI Reset
+// WiFi Reset
 //
 #ifdef MENU_RESET_WIFI
   #define RESET_WIFI_PIN                    PB12
diff --git a/Marlin/src/pins/stm32f4/pins_MELLOW_FLY_E3_V2.h b/Marlin/src/pins/stm32f4/pins_MELLOW_FLY_E3_V2.h
new file mode 100644
index 00000000000..39073bffcec
--- /dev/null
+++ b/Marlin/src/pins/stm32f4/pins_MELLOW_FLY_E3_V2.h
@@ -0,0 +1,521 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2023 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+#if NOT_TARGET(STM32F4)
+  #error "Oops! Select an STM32F4 board in 'Tools > Board.'"
+#endif
+
+#ifndef BOARD_INFO_NAME
+  #define BOARD_INFO_NAME "Mellow Fly E3 V2"
+#endif
+
+// If you have the BigTreeTech driver expansion module, enable BTT_MOTOR_EXPANSION
+// https://github.com/bigtreetech/BTT-Expansion-module/tree/master/BTT%20EXP-MOT
+//#define BTT_MOTOR_EXPANSION
+
+#if ALL(HAS_WIRED_LCD, BTT_MOTOR_EXPANSION)
+  #if ANY(CR10_STOCKDISPLAY, ENDER2_STOCKDISPLAY)
+    #define EXP_MOT_USE_EXP2_ONLY 1
+  #else
+    #error "You can't use both an LCD and a Motor Expansion Module on EXP1/EXP2 at the same time."
+  #endif
+#endif
+
+// Use one of these or SDCard-based Emulation will be used
+#if NO_EEPROM_SELECTED
+  //#define SRAM_EEPROM_EMULATION                 // Use BackSRAM-based EEPROM emulation
+  #define FLASH_EEPROM_EMULATION                  // Use Flash-based EEPROM emulation
+#endif
+
+#if ENABLED(FLASH_EEPROM_EMULATION)
+  // Decrease delays and flash wear by spreading writes across the
+  // 128 kB sector allocated for EEPROM emulation.
+  #define FLASH_EEPROM_LEVELING
+#endif
+
+//
+// Servos
+//
+#define SERVO0_PIN                          PE6   // SERVOS
+
+//
+// Trinamic Stallguard pins
+//
+#define X_DIAG_PIN                          PE7   // X-STOP
+#define Y_DIAG_PIN                          PE8   // Y-STOP
+#define Z_DIAG_PIN                          PE9   // Z-STOP
+
+//
+// Limit Switches
+//
+#ifdef X_STALL_SENSITIVITY
+  #define X_STOP_PIN                  X_DIAG_PIN
+#else
+  #define X_STOP_PIN                        PE7   // X-STOP
+#endif
+
+#ifdef Y_STALL_SENSITIVITY
+  #define Y_STOP_PIN                  Y_DIAG_PIN
+#else
+  #define Y_STOP_PIN                        PE8   // Y-STOP
+#endif
+
+#ifdef Z_STALL_SENSITIVITY
+  #define Z_STOP_PIN                  Z_DIAG_PIN
+#else
+  #ifndef Z_STOP_PIN
+    #define Z_STOP_PIN                      PE9   // Z-STOP
+  #endif
+#endif
+
+//
+// Z Probe must be this pin
+//
+#define Z_MIN_PROBE_PIN                     PC2   // PROBE
+
+//
+// Probe enable
+//
+#if ENABLED(PROBE_ENABLE_DISABLE)
+  #ifndef PROBE_ENABLE_PIN
+    #define PROBE_ENABLE_PIN          SERVO0_PIN
+  #endif
+#endif
+
+//
+// Steppers
+//
+#define X_ENABLE_PIN                        PC1
+#define X_STEP_PIN                          PE5
+#define X_DIR_PIN                           PC0
+#ifndef X_CS_PIN
+  #define X_CS_PIN                          PC15
+#endif
+
+#define Y_ENABLE_PIN                        PC14
+#define Y_STEP_PIN                          PE4
+#define Y_DIR_PIN                           PC13
+#ifndef Y_CS_PIN
+  #define Y_CS_PIN                          PB6
+#endif
+
+#define Z_ENABLE_PIN                        PE3
+#define Z_STEP_PIN                          PE1
+#define Z_DIR_PIN                           PB7
+#ifndef Z_CS_PIN
+  #define Z_CS_PIN                          PD7
+#endif
+
+#define E0_ENABLE_PIN                       PD6
+#define E0_STEP_PIN                         PE2
+#define E0_DIR_PIN                          PD5
+#ifndef E0_CS_PIN
+  #define E0_CS_PIN                         PD4
+#endif
+
+#define E1_ENABLE_PIN                       PD3
+#define E1_STEP_PIN                         PE0
+#define E1_DIR_PIN                          PD1
+#ifndef E1_CS_PIN
+  #define E1_CS_PIN                         PD0
+#endif
+
+//
+// Temperature Sensors
+//
+#define TEMP_BED_PIN                        PB1   // Analog Input "TB"
+#define TEMP_0_PIN                          PC4   // Analog Input "TH0"
+#define TEMP_1_PIN                          PC5   // Analog Input "TH0"
+
+//
+// Heaters / Fans
+//
+#ifndef HEATER_BED_PIN
+  #define HEATER_BED_PIN                    PB0   // "HB"
+#endif
+#ifndef HEATER_0_PIN
+  #define HEATER_0_PIN                      PC6   // "HE0"
+#endif
+#ifndef HEATER_1_PIN
+  #define HEATER_1_PIN                      PC7   // "HE0"
+#endif
+
+#ifndef FAN0_PIN
+  #define FAN0_PIN                          PA0   // "FAN0"
+#endif
+#ifndef FAN1_PIN
+  #define FAN1_PIN                          PA1
+#endif
+#ifndef FAN2_PIN
+  #define FAN2_PIN                          PA2
+#endif
+#ifndef FAN3_PIN
+  #define FAN3_PIN                          PA3
+#endif
+
+#ifndef TMC_SPI_MOSI
+  #define TMC_SPI_MOSI                      PB5
+#endif
+#ifndef TMC_SPI_MISO
+  #define TMC_SPI_MISO                      PB4
+#endif
+#ifndef TMC_SPI_SCK
+  #define TMC_SPI_SCK                       PB3
+#endif
+
+#if HAS_TMC_UART
+  /**
+   * TMC2208/TMC2209 stepper drivers
+   *
+   * Hardware serial communication ports.
+   * If undefined software serial is used according to the pins below
+   */
+  //#define X_HARDWARE_SERIAL  Serial1
+  //#define X2_HARDWARE_SERIAL Serial1
+  //#define Y_HARDWARE_SERIAL  Serial1
+  //#define Y2_HARDWARE_SERIAL Serial1
+  //#define Z_HARDWARE_SERIAL  Serial1
+  //#define Z2_HARDWARE_SERIAL Serial1
+  //#define E0_HARDWARE_SERIAL Serial1
+  //#define E1_HARDWARE_SERIAL Serial1
+  //#define E2_HARDWARE_SERIAL Serial1
+  //#define E3_HARDWARE_SERIAL Serial1
+  //#define E4_HARDWARE_SERIAL Serial1
+
+  //
+  // Software serial
+  //
+  #define X_SERIAL_TX_PIN                   PC15
+  #define X_SERIAL_RX_PIN        X_SERIAL_TX_PIN
+
+  #define Y_SERIAL_TX_PIN                   PB6
+  #define Y_SERIAL_RX_PIN        Y_SERIAL_TX_PIN
+
+  #define Z_SERIAL_TX_PIN                   PD7
+  #define Z_SERIAL_RX_PIN        Z_SERIAL_TX_PIN
+
+  #define E0_SERIAL_TX_PIN                  PD4
+  #define E0_SERIAL_RX_PIN      E0_SERIAL_TX_PIN
+
+  #define E1_SERIAL_TX_PIN                  PD0
+  #define E1_SERIAL_RX_PIN      E1_SERIAL_TX_PIN
+
+  // Reduce baud rate to improve software serial reliability
+  #ifndef TMC_BAUD_RATE
+    #define TMC_BAUD_RATE                  19200
+  #endif
+
+#endif // HAS_TMC_UART
+
+#ifndef SDCARD_CONNECTION
+  #define SDCARD_CONNECTION              ONBOARD
+#endif
+
+/**
+ *              Fly-E3-v2
+ *                ------                                    ------
+ * (BEEPER) PD10 | 1  2 | PA9  (BTN_ENC)  (MISO)       PA6 | 1  2 | PA5 (SCK)
+ * (LCD_EN) PA8  | 3  4 | PA10 (LCD_RS)   (BTN_EN1)   PB11 | 3  4 | PA4 (SD_SS)
+ * (LCD_D4) PE15 | 5  6   PE14 (LCD_D5)   (BTN_EN2)   PB10 | 5  6 | PA7 (MOSI)
+ * (LCD_D6) PA14 | 7  8 | PA13 (LCD_D7)   (SD_DETECT) PE13 | 7  8 | RESET
+ *           GND | 9 10 | 5V                           GND | 9 10 | --
+ *                ------                                    ------
+ *                 EXP1                                      EXP2
+ */
+#define EXP1_01_PIN                         PD10
+#define EXP1_02_PIN                         PA9
+#define EXP1_03_PIN                         PA8
+#define EXP1_04_PIN                         PA10
+#define EXP1_05_PIN                         PE15
+#define EXP1_06_PIN                         PE14
+#define EXP1_07_PIN                         PA14
+#define EXP1_08_PIN                         PA13
+
+#define EXP2_01_PIN                         PA6
+#define EXP2_02_PIN                         PA5
+#define EXP2_03_PIN                         PB11
+#define EXP2_04_PIN                         PA4
+#define EXP2_05_PIN                         PB10
+#define EXP2_06_PIN                         PA7
+#define EXP2_07_PIN                         PE13
+#define EXP2_08_PIN                         -1
+
+//
+// Onboard SD card
+// Must use soft SPI because Marlin's default hardware SPI is tied to LCD's EXP2
+//
+#if SD_CONNECTION_IS(LCD)
+  #define SDSS                       EXP2_04_PIN
+  #define SD_SS_PIN                         SDSS
+  #define SD_SCK_PIN                 EXP2_02_PIN
+  #define SD_MISO_PIN                EXP2_01_PIN
+  #define SD_MOSI_PIN                EXP2_06_PIN
+  #define SD_DETECT_PIN              EXP2_07_PIN
+#elif SD_CONNECTION_IS(ONBOARD)
+  #define ONBOARD_SDIO                            // Use SDIO for onboard SD
+#elif SD_CONNECTION_IS(CUSTOM_CABLE)
+  #error "No custom SD drive cable defined for this board."
+#endif
+
+#if ENABLED(BTT_MOTOR_EXPANSION)
+  /**       -----                        -----
+   *    -- | . . | GND               -- | . . | GND
+   *    -- | . . | M1EN            M2EN | . . | M3EN
+   * M1STP | . .   M1DIR           M1RX | . .   M1DIAG
+   * M2DIR | . . | M2STP           M2RX | . . | M2DIAG
+   * M3DIR | . . | M3STP           M3RX | . . | M3DIAG
+   *        -----                        -----
+   *        EXP2                         EXP1
+   *
+   * NB In EXP_MOT_USE_EXP2_ONLY mode EXP1 is not used and M2EN and M3EN need to be jumpered to M1EN
+   */
+
+  // M1 on Driver Expansion Module
+  #define E2_STEP_PIN                EXP2_06_PIN
+  #define E2_DIR_PIN                 EXP2_05_PIN
+  #define E2_ENABLE_PIN              EXP2_07_PIN
+  #if !EXP_MOT_USE_EXP2_ONLY
+    #define E2_DIAG_PIN              EXP1_05_PIN
+    #define E2_CS_PIN                EXP1_06_PIN
+    #if HAS_TMC_UART
+      #define E2_SERIAL_TX_PIN       EXP1_06_PIN
+      #define E2_SERIAL_RX_PIN       EXP1_06_PIN
+    #endif
+  #endif
+
+  // M2 on Driver Expansion Module
+  #define E3_STEP_PIN                EXP2_03_PIN
+  #define E3_DIR_PIN                 EXP2_04_PIN
+  #if !EXP_MOT_USE_EXP2_ONLY
+    #define E3_ENABLE_PIN            EXP1_08_PIN
+    #define E3_DIAG_PIN              EXP1_03_PIN
+    #define E3_CS_PIN                EXP1_04_PIN
+    #if HAS_TMC_UART
+      #define E3_SERIAL_TX_PIN       EXP1_04_PIN
+      #define E3_SERIAL_RX_PIN       EXP1_04_PIN
+    #endif
+  #else
+    #define E3_ENABLE_PIN            EXP2_07_PIN
+  #endif
+
+  // M3 on Driver Expansion Module
+  #define E4_STEP_PIN                EXP2_01_PIN
+  #define E4_DIR_PIN                 EXP2_02_PIN
+  #if !EXP_MOT_USE_EXP2_ONLY
+    #define E4_ENABLE_PIN            EXP1_07_PIN
+    #define E4_DIAG_PIN              EXP1_01_PIN
+    #define E4_CS_PIN                EXP1_02_PIN
+    #if HAS_TMC_UART
+      #define E4_SERIAL_TX_PIN       EXP1_02_PIN
+      #define E4_SERIAL_RX_PIN       EXP1_02_PIN
+    #endif
+  #else
+    #define E4_ENABLE_PIN            EXP2_07_PIN
+  #endif
+
+#endif // BTT_MOTOR_EXPANSION
+
+//
+// LCDs and Controllers
+//
+#if IS_TFTGLCD_PANEL
+
+  #if ENABLED(TFTGLCD_PANEL_SPI)
+    #define TFTGLCD_CS               EXP2_03_PIN
+  #endif
+
+#elif HAS_WIRED_LCD
+
+  #define BEEPER_PIN                 EXP1_01_PIN
+  #define BTN_ENC                    EXP1_02_PIN
+
+  #if ENABLED(CR10_STOCKDISPLAY)
+
+    #define LCD_PINS_RS              EXP1_07_PIN
+
+    #define BTN_EN1                  EXP1_03_PIN
+    #define BTN_EN2                  EXP1_05_PIN
+
+    #define LCD_PINS_EN              EXP1_08_PIN
+    #define LCD_PINS_D4              EXP1_06_PIN
+
+  #elif ENABLED(MKS_MINI_12864)
+
+    #define DOGLCD_A0                EXP1_07_PIN
+    #define DOGLCD_CS                EXP1_06_PIN
+    #define BTN_EN1                  EXP2_03_PIN
+    #define BTN_EN2                  EXP2_05_PIN
+
+  #else
+
+    #define LCD_PINS_RS              EXP1_04_PIN
+
+    #define BTN_EN1                  EXP2_03_PIN
+    #define BTN_EN2                  EXP2_05_PIN
+
+    #define LCD_PINS_EN              EXP1_03_PIN
+    #define LCD_PINS_D4              EXP1_05_PIN
+
+    #if ENABLED(FYSETC_MINI_12864)
+      #define DOGLCD_CS              EXP1_03_PIN
+      #define DOGLCD_A0              EXP1_04_PIN
+      //#define LCD_BACKLIGHT_PIN           -1
+      #define LCD_RESET_PIN          EXP1_05_PIN  // Must be high or open for LCD to operate normally.
+      #if ANY(FYSETC_MINI_12864_1_2, FYSETC_MINI_12864_2_0)
+        #ifndef RGB_LED_R_PIN
+          #define RGB_LED_R_PIN      EXP1_06_PIN
+        #endif
+        #ifndef RGB_LED_G_PIN
+          #define RGB_LED_G_PIN      EXP1_07_PIN
+        #endif
+        #ifndef RGB_LED_B_PIN
+          #define RGB_LED_B_PIN      EXP1_08_PIN
+        #endif
+      #elif ENABLED(FYSETC_MINI_12864_2_1)
+        #define NEOPIXEL_PIN         EXP1_06_PIN
+      #endif
+    #endif // !FYSETC_MINI_12864
+
+    #if IS_ULTIPANEL
+      #define LCD_PINS_D5            EXP1_06_PIN
+      #define LCD_PINS_D6            EXP1_07_PIN
+      #define LCD_PINS_D7            EXP1_08_PIN
+
+      #if ENABLED(REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER)
+        #define BTN_ENC_EN           LCD_PINS_D7  // Detect the presence of the encoder
+      #endif
+
+    #endif
+
+  #endif
+
+#endif // HAS_WIRED_LCD
+
+#if HAS_SPI_TFT
+
+  #define TFT_SCK_PIN                EXP2_02_PIN
+  #define TFT_MISO_PIN               EXP2_01_PIN
+  #define TFT_MOSI_PIN               EXP2_06_PIN
+
+  #define BTN_ENC                    EXP1_02_PIN
+  #define BTN_EN1                    EXP2_03_PIN
+  #define BTN_EN2                    EXP2_05_PIN
+
+  #ifndef TFT_WIDTH
+    #define TFT_WIDTH                        480
+  #endif
+  #ifndef TFT_HEIGHT
+    #define TFT_HEIGHT                       320
+  #endif
+
+  #if ENABLED(BTT_TFT35_SPI_V1_0)
+    // 480x320, 3.5", SPI Display with Rotary Encoder.
+    // Stock Display for the BIQU B1 SE.
+    #define TFT_CS_PIN               EXP2_04_PIN
+    #define TFT_DC_PIN               EXP2_07_PIN
+    #define TFT_A0_PIN                TFT_DC_PIN
+
+    #define TOUCH_CS_PIN             EXP1_04_PIN
+    #define TOUCH_SCK_PIN            EXP1_05_PIN
+    #define TOUCH_MISO_PIN           EXP1_06_PIN
+    #define TOUCH_MOSI_PIN           EXP1_03_PIN
+    #define TOUCH_INT_PIN            EXP1_07_PIN
+
+    #ifndef TOUCH_CALIBRATION_X
+      #define TOUCH_CALIBRATION_X          17540
+    #endif
+    #ifndef TOUCH_CALIBRATION_Y
+      #define TOUCH_CALIBRATION_Y         -11388
+    #endif
+    #ifndef TOUCH_OFFSET_X
+      #define TOUCH_OFFSET_X                 -21
+    #endif
+    #ifndef TOUCH_OFFSET_Y
+      #define TOUCH_OFFSET_Y                 337
+    #endif
+    #ifndef TOUCH_ORIENTATION
+      #define TOUCH_ORIENTATION  TOUCH_LANDSCAPE
+    #endif
+
+  #elif ENABLED(MKS_TS35_V2_0)
+
+    /**                      ------                                   ------
+     *               BEEPER | 1  2 | BTN_ENC               SPI1_MISO | 1  2 | SPI1_SCK
+     *     TFT_BKL / LCD_EN | 3  4 | TFT_RESET / LCD_RS      BTN_EN1 | 3  4 | SPI1_CS
+     *    TOUCH_CS / LCD_D4 | 5  6   TOUCH_INT / LCD_D5      BTN_EN2 | 5  6   SPI1_MOSI
+     *     SPI1_CS / LCD_D6 | 7  8 | SPI1_RS / LCD_D7       SPI1_RS  | 7  8 | RESET
+     *                  GND | 9 10 | VCC                         GND | 9 10 | VCC
+     *                       ------                                   ------
+     *                        EXP1                                     EXP2
+     */
+    #define TFT_CS_PIN               EXP1_07_PIN  // SPI1_CS
+    #define TFT_DC_PIN               EXP1_08_PIN  // SPI1_RS
+    #define TFT_A0_PIN                TFT_DC_PIN
+
+    #define TFT_RESET_PIN            EXP1_04_PIN
+
+    #define LCD_BACKLIGHT_PIN        EXP1_03_PIN
+    #define TFT_BACKLIGHT_PIN  LCD_BACKLIGHT_PIN
+
+    #define TOUCH_BUTTONS_HW_SPI
+    #define TOUCH_BUTTONS_HW_SPI_DEVICE        1
+
+    #define TOUCH_CS_PIN             EXP1_05_PIN  // SPI1_NSS
+    #define TOUCH_SCK_PIN            EXP2_02_PIN  // SPI1_SCK
+    #define TOUCH_MISO_PIN           EXP2_01_PIN  // SPI1_MISO
+    #define TOUCH_MOSI_PIN           EXP2_06_PIN  // SPI1_MOSI
+
+    #define LCD_READ_ID                     0xD3
+    #define LCD_USE_DMA_SPI
+
+    #define TFT_BUFFER_SIZE                14400
+
+  #endif
+
+#endif // HAS_SPI_TFT
+
+// Alter timing for graphical display
+#if IS_U8GLIB_ST7920
+  #ifndef BOARD_ST7920_DELAY_1
+    #define BOARD_ST7920_DELAY_1             120
+  #endif
+  #ifndef BOARD_ST7920_DELAY_2
+    #define BOARD_ST7920_DELAY_2              80
+  #endif
+  #ifndef BOARD_ST7920_DELAY_3
+    #define BOARD_ST7920_DELAY_3             580
+  #endif
+#endif
+
+//#define POWER_MONITOR_VOLTAGE_PIN         PC3
+
+//
+// WiFi
+//
+#if ENABLED(WIFISUPPORT)
+  #define ESP_WIFI_MODULE_COM                  3  // Must also set either SERIAL_PORT or SERIAL_PORT_2 to this
+  #define ESP_WIFI_MODULE_BAUDRATE      BAUDRATE  // Must use same BAUDRATE as SERIAL_PORT & SERIAL_PORT_2
+  #define ESP_WIFI_MODULE_RESET_PIN         PE11
+  #define ESP_WIFI_MODULE_GPIO0_PIN         PE10
+  #define ESP_WIFI_MODULE_GPIO4_PIN         PE12
+#endif
diff --git a/Marlin/src/pins/stm32h7/pins_BTT_OCTOPUS_MAX_EZ.h b/Marlin/src/pins/stm32h7/pins_BTT_OCTOPUS_MAX_EZ.h
index 9d30d853b5d..ded9ec4e891 100644
--- a/Marlin/src/pins/stm32h7/pins_BTT_OCTOPUS_MAX_EZ.h
+++ b/Marlin/src/pins/stm32h7/pins_BTT_OCTOPUS_MAX_EZ.h
@@ -449,7 +449,7 @@
 #endif
 
 //
-// WIFI
+// WiFi
 //
 #if ENABLED(WIFISUPPORT)
   /**
diff --git a/ini/stm32f4.ini b/ini/stm32f4.ini
index bb594b97f90..454337295d2 100644
--- a/ini/stm32f4.ini
+++ b/ini/stm32f4.ini
@@ -806,3 +806,22 @@ board_build.offset = 0x8000
 build_flags        = ${stm32_variant.build_flags} -DSTM32F407_5ZX
 debug_tool         = stlink
 upload_protocol    = stlink
+
+#
+# Mellow Fly E3 V2 (STM32F407VGT6 ARM Cortex-M4)
+#
+[env:FLY_E3_V2]
+extends                     = stm32_variant
+board                       = marlin_STM32F407VGT6_CCM
+board_build.variant         = MARLIN_F4x7Vx
+board_build.offset          = 0x8000
+board_upload.offset_address = 0x08008000
+build_flags                 = ${stm32_variant.build_flags}
+                              -DHAVE_HWSERIAL1 -DHAVE_HWSERIAL3
+                              -DPIN_SERIAL1_RX=PA_10 -DPIN_SERIAL1_TX=PA_9
+                              -DPIN_SERIAL3_RX=PD_9 -DPIN_SERIAL3_TX=PD_8
+                              -DHAL_SD_MODULE_ENABLED
+                              -DUSE_USBHOST_HS -DUSE_USB_HS_IN_FS
+                              -DUSBD_IRQ_PRIO=5 -DUSBD_IRQ_SUBPRIO=6
+                              -DHSE_VALUE=8000000U
+upload_protocol             = stlink