diff --git a/boards.txt b/boards.txt
index 8c4519ef56..e89e024c76 100644
--- a/boards.txt
+++ b/boards.txt
@@ -680,6 +680,12 @@ GenF1.menu.upload_method.bmpMethod=BMP (Black Magic Probe)
 GenF1.menu.upload_method.bmpMethod.upload.protocol=gdb_bmp
 GenF1.menu.upload_method.bmpMethod.upload.tool=bmp_upload
 
+GenF1.menu.upload_method.hidMethod=HID Bootloader 2.2
+GenF1.menu.upload_method.hidMethod.upload.protocol=hid22
+GenF1.menu.upload_method.hidMethod.upload.tool=hid_upload
+GenF1.menu.upload_method.hidMethod.build.flash_offset=0x800
+GenF1.menu.upload_method.hidMethod.build.bootloader_flags=-DBL_HID -DVECT_TAB_OFFSET={build.flash_offset}                         
+
 GenF1.menu.upload_method.dfu2Method=Maple DFU Bootloader 2.0
 GenF1.menu.upload_method.dfu2Method.upload.protocol=maple
 GenF1.menu.upload_method.dfu2Method.upload.tool=maple_upload
@@ -704,7 +710,7 @@ GenF4.name=Generic STM32F4 series
 GenF4.build.vid=0x0483
 GenF4.build.core=arduino
 GenF4.build.board=GenF4
-GenF4.build.extra_flags=-D{build.product_line} {build.enable_usb} {build.xSerial}
+GenF4.build.extra_flags=-D{build.product_line} {build.enable_usb} {build.xSerial} {build.bootloader_flags}
 GenF4.build.mcu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=hard
 GenF4.build.series=STM32F4xx
 GenF4.build.cmsis_lib_gcc=arm_cortexM4l_math
@@ -785,6 +791,12 @@ GenF4.menu.upload_method.bmpMethod=BMP (Black Magic Probe)
 GenF4.menu.upload_method.bmpMethod.upload.protocol=gdb_bmp
 GenF4.menu.upload_method.bmpMethod.upload.tool=bmp_upload
 
+GenF4.menu.upload_method.hidMethod=HID Bootloader 2.2
+GenF4.menu.upload_method.hidMethod.upload.protocol=hid22
+GenF4.menu.upload_method.hidMethod.upload.tool=hid_upload
+GenF4.menu.upload_method.hidMethod.build.flash_offset=0x4000
+GenF4.menu.upload_method.hidMethod.build.bootloader_flags=-DBL_HID -DVECT_TAB_OFFSET={build.flash_offset}                                                                                                        
+
 ###############################
 # Sparky Flight Controllers
 
diff --git a/cores/arduino/stm32/backup.h b/cores/arduino/stm32/backup.h
index 26ffd37c20..85907f4e4b 100644
--- a/cores/arduino/stm32/backup.h
+++ b/cores/arduino/stm32/backup.h
@@ -46,6 +46,17 @@ extern "C" {
 #define RTC_BKP_VALUE 0x32F2
 #endif
 
+#if defined (BL_HID)
+#if !defined(HID_MAGIC_NUMBER_BKP_INDEX)
+#define HID_MAGIC_NUMBER_BKP_INDEX LL_RTC_BKP_DR4
+#endif /* HID_MAGIC_NUMBER_BKP_INDEX */
+#if !defined(HID_OLD_MAGIC_NUMBER_BKP_INDEX) && defined(LL_RTC_BKP_DR10)
+#define HID_OLD_MAGIC_NUMBER_BKP_INDEX LL_RTC_BKP_DR10
+#endif /* HID_OLD_MAGIC_NUMBER_BKP_INDEX */
+#ifndef HID_MAGIC_NUMBER_BKP_VALUE
+#define HID_MAGIC_NUMBER_BKP_VALUE 0x424C
+#endif /* HID_MAGIC_NUMBER_BKP_VALUE */
+#endif /* BL_HID */
 
 /* Exported functions ------------------------------------------------------- */
 static inline void resetBackupDomain(void)
diff --git a/cores/arduino/stm32/bootloader.c b/cores/arduino/stm32/bootloader.c
index a5bb10c0b0..d7d86e968e 100644
--- a/cores/arduino/stm32/bootloader.c
+++ b/cores/arduino/stm32/bootloader.c
@@ -1,6 +1,7 @@
 #include "bootloader.h"
 
 #include "stm32_def.h"
+#include "backup.h"
 
 #ifdef BL_LEGACY_LEAF
 void dtr_togglingHook(uint8_t *buf, uint32_t *len)
@@ -15,3 +16,24 @@ void dtr_togglingHook(uint8_t *buf, uint32_t *len)
   }
 }
 #endif /* BL_LEGACY_LEAF */
+
+#ifdef BL_HID
+void dtr_togglingHook(uint8_t *buf, uint32_t *len)
+{
+  /**
+   * Four byte is the magic pack "1EAF" that puts the MCU into bootloader.
+   * Check if the incoming contains the string "1EAF".
+   * If yes, put the MCU into the bootloader mode.
+   */
+  if ((*len >= 4) && (buf[0] == '1') && (buf[1] == 'E') && (buf[2] == 'A') && (buf[3] == 'F')) {
+    enableBackupDomain();
+    /* New HID Bootloader (ver 2.2+) */
+    setBackupRegister(HID_MAGIC_NUMBER_BKP_INDEX, HID_MAGIC_NUMBER_BKP_VALUE);
+#ifdef HID_OLD_MAGIC_NUMBER_BKP_INDEX
+    /* Compatibility to the old HID Bootloader (ver <= 2.1) */
+    setBackupRegister(HID_OLD_MAGIC_NUMBER_BKP_INDEX, HID_MAGIC_NUMBER_BKP_VALUE);
+#endif
+    NVIC_SystemReset();
+  }
+}
+#endif /* BL_HID */
diff --git a/cores/arduino/stm32/bootloader.h b/cores/arduino/stm32/bootloader.h
index da3de5bc99..5e69157e12 100644
--- a/cores/arduino/stm32/bootloader.h
+++ b/cores/arduino/stm32/bootloader.h
@@ -2,10 +2,10 @@
 #define _BOOTLOADER_H_
 
 /* Ensure DTR_TOGGLING_SEQ enabled */
-#ifdef BL_LEGACY_LEAF
+#if defined(BL_LEGACY_LEAF) || defined(BL_HID)
 #ifndef DTR_TOGGLING_SEQ
 #define DTR_TOGGLING_SEQ
-#endif /* DTR_TOGGLING_SEQ */
+#endif /* DTR_TOGGLING_SEQ || BL_HID */
 #endif /* BL_LEGACY_LEAF */
 
 #ifdef __cplusplus
diff --git a/platform.txt b/platform.txt
index c8ec895fbf..b3baeb77f8 100644
--- a/platform.txt
+++ b/platform.txt
@@ -169,6 +169,16 @@ tools.bmp_upload.upload.params.verbose=-batch
 tools.bmp_upload.upload.params.quiet=--batch-silent
 tools.bmp_upload.upload.pattern="{path}{cmd}" -nx -b {upload.speed} {upload.verbose} -ex "set confirm off" -ex "target extended-remote {serial.port}" -ex "monitor swdp_scan" -ex "attach 1" -ex "load" -ex "compare-sections" -ex "kill" "{build.path}/{build.project_name}.elf"
 
+# HID flash 2.2 (HID bootloader v2.2 for STM32F1 and STM32F4 series)
+tools.hid_upload.cmd=hid-flash
+tools.hid_upload.cmd.windows=hid-flash.exe
+tools.hid_upload.path={runtime.hardware.path}/tools/win
+tools.hid_upload.path.macosx={runtime.hardware.path}/tools/macosx
+tools.hid_upload.path.linux={runtime.hardware.path}/tools/linux
+tools.hid_upload.upload.params.verbose=-d
+tools.hid_upload.upload.params.quiet=n
+tools.hid_upload.upload.pattern="{path}/{cmd}" "{build.path}/{build.project_name}.bin" {serial.port.file}                                                                                                                             
+
 # Upload using Maple bootloader over DFU
 tools.maple_upload.cmd=maple_upload
 tools.maple_upload.cmd.windows=maple_upload.bat
diff --git a/variants/DIYMROE_F407VGT/ldscript.ld b/variants/DIYMROE_F407VGT/ldscript.ld
index 259685d655..103dbacdac 100644
--- a/variants/DIYMROE_F407VGT/ldscript.ld
+++ b/variants/DIYMROE_F407VGT/ldscript.ld
@@ -52,7 +52,7 @@
 ENTRY(Reset_Handler)
 
 /* Highest address of the user mode stack */
-_estack = 0x20020000;    /* end of RAM */
+_estack = 0x20000000 + LD_MAX_DATA_SIZE;    /* end of RAM */
 /* Generate a link error if heap and stack don't fit into RAM */
 _Min_Heap_Size = 0x200;      /* required amount of heap  */
 _Min_Stack_Size = 0x400; /* required amount of stack */
@@ -60,9 +60,9 @@ _Min_Stack_Size = 0x400; /* required amount of stack */
 /* Specify the memory areas */
 MEMORY
 {
-RAM (xrw)      : ORIGIN = 0x20000000, LENGTH = 128K
+RAM (xrw)      : ORIGIN = 0x20000000, LENGTH = LD_MAX_DATA_SIZE
 CCMRAM (rw)      : ORIGIN = 0x10000000, LENGTH = 64K
-FLASH (rx)      : ORIGIN = 0x8000000, LENGTH = 1024K
+FLASH (rx)      : ORIGIN = 0x8000000 + LD_FLASH_OFFSET, LENGTH = LD_MAX_SIZE - LD_FLASH_OFFSET
 }
 
 /* Define output sections */