diff --git a/boards/bluepill_f103c8.json b/boards/bluepill_f103c8.json
index dcfee427..f41adb3e 100644
--- a/boards/bluepill_f103c8.json
+++ b/boards/bluepill_f103c8.json
@@ -52,7 +52,8 @@
       "jlink",
       "stlink",
       "blackmagic",
-      "mbed"
+      "mbed",
+      "dfu"
     ]
   },
   "url": "http://www.st.com/content/st_com/en/products/microcontrollers/stm32-32-bit-arm-cortex-mcus/stm32f1-series/stm32f103/stm32f103c8.html",
diff --git a/boards/genericSTM32F103C8.json b/boards/genericSTM32F103C8.json
index f62d4bc2..a032f9e5 100644
--- a/boards/genericSTM32F103C8.json
+++ b/boards/genericSTM32F103C8.json
@@ -37,7 +37,8 @@
       "jlink",
       "stlink",
       "blackmagic",
-      "serial"
+      "serial",
+      "dfu"
     ],
     "require_upload_port": true,
     "use_1200bps_touch": false,
diff --git a/boards/genericSTM32F103CB.json b/boards/genericSTM32F103CB.json
index b2d760f2..4494c3fa 100644
--- a/boards/genericSTM32F103CB.json
+++ b/boards/genericSTM32F103CB.json
@@ -36,7 +36,8 @@
       "jlink",
       "stlink",
       "blackmagic",
-      "serial"
+      "serial",
+      "dfu"
     ],
     "require_upload_port": true,
     "use_1200bps_touch": false,
diff --git a/boards/genericSTM32F103R8.json b/boards/genericSTM32F103R8.json
index 460a1d54..83f45298 100644
--- a/boards/genericSTM32F103R8.json
+++ b/boards/genericSTM32F103R8.json
@@ -36,7 +36,8 @@
       "jlink",
       "stlink",
       "blackmagic",
-      "serial"
+      "serial",
+      "dfu"
     ],
     "require_upload_port": true,
     "use_1200bps_touch": false,
diff --git a/boards/genericSTM32F103RB.json b/boards/genericSTM32F103RB.json
index 0175d1d1..c9f36b39 100644
--- a/boards/genericSTM32F103RB.json
+++ b/boards/genericSTM32F103RB.json
@@ -37,7 +37,8 @@
       "jlink",
       "stlink",
       "blackmagic",
-      "serial"
+      "serial",
+      "dfu"
     ],
     "require_upload_port": true,
     "use_1200bps_touch": false,
diff --git a/boards/genericSTM32F103RC.json b/boards/genericSTM32F103RC.json
index 5ef89580..193d03d3 100644
--- a/boards/genericSTM32F103RC.json
+++ b/boards/genericSTM32F103RC.json
@@ -36,7 +36,8 @@
       "jlink",
       "stlink",
       "blackmagic",
-      "serial"
+      "serial",
+      "dfu"
     ],
     "require_upload_port": true,
     "use_1200bps_touch": false,
diff --git a/boards/genericSTM32F103RE.json b/boards/genericSTM32F103RE.json
index 7ade0ec6..b815b0d3 100644
--- a/boards/genericSTM32F103RE.json
+++ b/boards/genericSTM32F103RE.json
@@ -36,7 +36,8 @@
       "jlink",
       "stlink",
       "blackmagic",
-      "serial"
+      "serial",
+      "dfu"
     ],
     "require_upload_port": true,
     "use_1200bps_touch": false,
diff --git a/boards/genericSTM32F103VC.json b/boards/genericSTM32F103VC.json
index 5919771d..8e459b4f 100644
--- a/boards/genericSTM32F103VC.json
+++ b/boards/genericSTM32F103VC.json
@@ -36,7 +36,8 @@
       "jlink",
       "stlink",
       "blackmagic",
-      "serial"
+      "serial",
+      "dfu"
     ],
     "require_upload_port": true,
     "use_1200bps_touch": false,
diff --git a/boards/genericSTM32F103VE.json b/boards/genericSTM32F103VE.json
index e0268bbd..eb4b076d 100644
--- a/boards/genericSTM32F103VE.json
+++ b/boards/genericSTM32F103VE.json
@@ -36,7 +36,8 @@
       "jlink",
       "stlink",
       "blackmagic",
-      "serial"
+      "serial",
+      "dfu"
     ],
     "require_upload_port": true,
     "use_1200bps_touch": false,
diff --git a/builder/frameworks/arduino/maple/stm32f1.py b/builder/frameworks/arduino/maple/stm32f1.py
index e44f6d42..9b1056f3 100644
--- a/builder/frameworks/arduino/maple/stm32f1.py
+++ b/builder/frameworks/arduino/maple/stm32f1.py
@@ -33,7 +33,7 @@
 assert isdir(FRAMEWORK_DIR)
 
 # default configuration values
-vector = 0x8000000
+vector = int(board.get("build.vec_tab_addr", "0x8000000"), 16)
 error_led_port = "GPIOB"
 error_led_pin = 1
 
@@ -66,31 +66,15 @@
         "GENERIC_BOOTLOADER"
     ])
 
-if "generic" in board.id:
-    if upload_protocol == "dfu":
-        vector = 0x8002000
-        env.Append(CPPDEFINES=["SERIAL_USB", "GENERIC_BOOTLOADER"])
-
-        if "f103c" in mcu_type:
-            ldscript = "bootloader_20.ld"
-        elif "f103r" in mcu_type:
-            ldscript = "bootloader.ld"
-        elif "f103v" in mcu_type:
-            ldscript = "stm32f103veDFU.ld"
-
-    elif board.get("build.vec_tab_addr", ""):
-        vector = int(board.get("build.vec_tab_addr"), 16)
-
 # maple board related configuration remap
-elif "maple" in board.id:
+if "maple" in board.id:
     env.Append(CPPDEFINES=[("SERIAL_USB")])
     variant = "maple_mini" if "maple_mini" in board.id else "maple"
-    vector = 0x8002000
-    ldscript = "bootloader_20"
-
-    if "maple_mini_origin" in board.id or "maple" in board.id:
-        vector = 0x8005000
-        ldscript = "flash.ld"
+    vector = 0x8005000
+    ldscript = "flash.ld"
+    if board.id == "maple_mini_b20":
+        vector = 0x8002000
+        ldscript = "bootloader_20"
 
 # for nucleo f103rb board
 elif "nucleo_f103rb" in board.id:
@@ -98,6 +82,16 @@
     ldscript = "jtag.ld"
     env.Append(CPPDEFINES=["NUCLEO_HSE_CRYSTAL"])
 
+elif upload_protocol == "dfu":
+    env.Append(CPPDEFINES=["SERIAL_USB", "GENERIC_BOOTLOADER"])
+    vector = 0x8002000
+    if "f103c" in mcu_type:
+        ldscript = "bootloader_20.ld"
+    elif "f103r" in mcu_type:
+        ldscript = "bootloader.ld"
+    elif "f103v" in mcu_type:
+        ldscript = "stm32f103veDFU.ld"
+
 
 env.Append(
     CFLAGS=["-std=gnu11"],
@@ -132,7 +126,9 @@
         join(FRAMEWORK_DIR, "system", "libmaple", "usb", "usb_lib")
     ],
 
-    LIBPATH=[join(FRAMEWORK_DIR, "variants", variant, "ld")]
+    LIBPATH=[join(FRAMEWORK_DIR, "variants", variant, "ld")],
+
+    LIBS=["c"]
 )
 
 # remap ldscript
@@ -144,7 +140,7 @@
         env['LINKFLAGS'].remove(item)
 
 # remove unused libraries
-for item in ("c", "stdc++", "nosys"):
+for item in ("stdc++", "nosys"):
     if item in env['LIBS']:
         env['LIBS'].remove(item)
 
diff --git a/platform.json b/platform.json
index 1608c56f..1b7bb140 100644
--- a/platform.json
+++ b/platform.json
@@ -12,7 +12,7 @@
     "type": "git",
     "url": "https://github.com/platformio/platform-ststm32.git"
   },
-  "version": "4.0.1",
+  "version": "4.0.2",
   "packageRepositories": [
     "https://dl.bintray.com/platformio/dl-packages/manifest.json",
     "http://dl.platformio.org/packages/manifest.json"
diff --git a/platform.py b/platform.py
index d6efc102..e400f151 100644
--- a/platform.py
+++ b/platform.py
@@ -25,9 +25,6 @@ def configure_default_packages(self, variables, targets):
                 'package'] = "framework-arduinostm32mxchip"
             self.frameworks['arduino'][
                 'script'] = "builder/frameworks/arduino/mxchip.py"
-
-            self.packages['tool-openocd']['type'] = "uploader"
-
             self.packages['toolchain-gccarmnoneeabi']['version'] = "~1.60301.0"
 
         return PlatformBase.configure_default_packages(self, variables,
@@ -73,14 +70,14 @@ def _add_default_debug_tools(self, board):
                 assert debug.get("openocd_target"), (
                     "Missed target configuration for %s" % board.id)
 
-                server_args = ["-f", "scripts/interface/%s.cfg" % link]
-                if link == "stlink":
-                    server_args.extend(["-c", "transport select hla_swd"])
-
-                server_args.extend([
+                server_args = [
+                    "-f",
+                    "scripts/interface/%s.cfg" % link, "-c",
+                    "transport select %s" % ("hla_swd"
+                                             if link == "stlink" else "swd"),
                     "-f",
                     "scripts/target/%s.cfg" % debug.get("openocd_target")
-                ])
+                ]
 
             debug['tools'][link] = {
                 "server": {