diff --git a/boards/_base/beken-72xx.json b/boards/_base/beken-72xx.json
index 81c093e..272105b 100644
--- a/boards/_base/beken-72xx.json
+++ b/boards/_base/beken-72xx.json
@@ -22,7 +22,13 @@
 	],
 	"upload": {
 		"maximum_ram_size": 262144,
-		"flash_size": 2097152
+		"flash_size": 2097152,
+		"require_upload_port": true,
+		"speed": 921600,
+		"protocol": "uart",
+		"protocols": [
+			"uart"
+		]
 	},
 	"doc": {
 		"params": {
diff --git a/builder/utils/uf2.py b/builder/utils/uf2.py
index 4342fa5..503ef41 100644
--- a/builder/utils/uf2.py
+++ b/builder/utils/uf2.py
@@ -61,6 +61,8 @@ def env_uf2upload(env, target):
             "${UF2OUT}",
             "uart",
             "${UPLOAD_PORT}",
+            "-b",
+            "${UPLOAD_SPEED}",
         ]
         actions = [
             env.VerboseAction(env.AutodetectUploadPort, "Looking for upload port..."),
diff --git a/platform.json b/platform.json
index 1d8cc10..3941402 100644
--- a/platform.json
+++ b/platform.json
@@ -111,6 +111,11 @@
       "optional": true,
       "owner": "platformio",
       "version": "~2.1100.0"
+    },
+    "tool-bk7231tools": {
+      "type": "uploader",
+      "optional": true,
+      "version": "https://github.com/libretuya/bk7231tools"
     }
   }
 }
diff --git a/platform.py b/platform.py
index 3a37493..26c7062 100644
--- a/platform.py
+++ b/platform.py
@@ -109,6 +109,10 @@ class LibretuyaPlatform(PlatformBase):
         if "arduino" in framework:
             self.packages["framework-arduino-api"]["optional"] = False
 
+        # require bk7231tools
+        if "beken-72xx" in framework:
+            self.packages["tool-bk7231tools"]["optional"] = False
+
         # mark framework SDK as required
         package_obj["optional"] = False
 
diff --git a/tools/soc/uf2_bk72xx.py b/tools/soc/uf2_bk72xx.py
new file mode 100644
index 0000000..925ef16
--- /dev/null
+++ b/tools/soc/uf2_bk72xx.py
@@ -0,0 +1,57 @@
+# Copyright (c) Kuba Szczodrzyński 2022-06-23.
+
+import sys
+
+try:
+    from platformio.package.manager.tool import ToolPackageManager
+
+    manager = ToolPackageManager()
+    pkg = manager.get_package("tool-bk7231tools")
+    sys.path.append(pkg.path)
+    from bk7231tools.serial import BK7231Serial
+except (ImportError, AttributeError):
+    print("You need PlatformIO and tool-bk7231tools package to run this program.")
+    exit(1)
+
+
+from tools.upload.ctx import UploadContext
+
+
+def upload_uart(
+    ctx: UploadContext,
+    port: str,
+    baud: int = None,
+    **kwargs,
+) -> bool:
+    prefix = "|   |--"
+    # connect to chip
+    bk = BK7231Serial(port=port, baudrate=baud or ctx.baudrate or 115200)
+
+    # collect continuous blocks of data
+    parts = ctx.collect(ota_idx=1)
+    # write blocks to flash
+    for offs, data in parts.items():
+        length = len(data.getvalue())
+        data.seek(0)
+        print(prefix, f"Writing {length} bytes to 0x{offs:06x}")
+        try:
+            bk.program_flash(
+                data,
+                length,
+                offs,
+                verbose=False,
+                crc_check=True,
+                dry_run=False,
+                really_erase=True,
+            )
+        except ValueError as e:
+            print(prefix, f"Writing failed: {e.args[0]}")
+            return False
+    return True
+
+
+def upload(ctx: UploadContext, protocol: str, **kwargs) -> bool:
+    if protocol == "uart":
+        return upload_uart(ctx, **kwargs)
+    print(f"Unknown upload protocol - {protocol}")
+    return False
diff --git a/tools/upload/uf2_rtltool.py b/tools/soc/uf2_rtltool.py
similarity index 100%
rename from tools/upload/uf2_rtltool.py
rename to tools/soc/uf2_rtltool.py
diff --git a/tools/upload/ctx.py b/tools/upload/ctx.py
index 7c866fc..8c3f2f3 100644
--- a/tools/upload/ctx.py
+++ b/tools/upload/ctx.py
@@ -53,6 +53,12 @@ class UploadContext:
             return None
         return datetime.fromtimestamp(letoint(self.uf2.tags[Tag.BUILD_DATE]))
 
+    @property
+    def baudrate(self) -> int:
+        if not self.board_manifest:
+            self.board_manifest = get_board_manifest(self.board)
+        return get(self.board_manifest, "upload.speed")
+
     def get_offset(self, part: str, offs: int) -> int:
         if not self.board_manifest:
             self.board_manifest = get_board_manifest(self.board)
@@ -87,7 +93,8 @@ class UploadContext:
             part1 = block.tags.get(Tag.LT_PART_1, None)
             part2 = block.tags.get(Tag.LT_PART_2, None)
 
-            if part1 and part2:
+            if part1 is not None and part2 is not None:
+                # decode empty tags too
                 self.part1 = part1.decode()
                 self.part2 = part2.decode()
             elif part1 or part2:
diff --git a/tools/upload/uf2upload.py b/tools/upload/uf2upload.py
index 5acdffc..65cec5a 100644
--- a/tools/upload/uf2upload.py
+++ b/tools/upload/uf2upload.py
@@ -40,7 +40,12 @@ if __name__ == "__main__":
 
     args = dict(args._get_kwargs())
     if uf2.family.code == "ambz":
-        from uf2_rtltool import upload
+        from tools.soc.uf2_rtltool import upload
+
+        if not upload(ctx, **args):
+            exit(1)
+    elif uf2.family.parent_code == "bk72xx":
+        from tools.soc.uf2_bk72xx import upload
 
         if not upload(ctx, **args):
             exit(1)