diff --git a/monitor/filter_rtl_hard_fault.py b/monitor/filter_rtl_hard_fault.py
new file mode 100644
index 0000000..880060f
--- /dev/null
+++ b/monitor/filter_rtl_hard_fault.py
@@ -0,0 +1,138 @@
+# Copyright (c) 2014-present PlatformIO <contact@platformio.org>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import re
+import subprocess
+import sys
+
+from platformio.commands.device import DeviceMonitorFilter
+from platformio.compat import PY2, WINDOWS, path_to_unicode
+from platformio.project.exception import PlatformioException
+from platformio.project.helpers import load_project_ide_data
+
+# By design, __init__ is called inside miniterm and we can't pass context to it.
+# pylint: disable=attribute-defined-outside-init
+
+
+class RtlHardFaultDecoder(DeviceMonitorFilter):
+    NAME = "rtl_hard_fault_decoder"
+
+    def __call__(self):
+        self.buffer = ""
+        self.re = re.compile(r"^RTL8195A\[HAL\]: (LR|PC) = (0x[0-9a-fA-F]+)")
+
+        self.firmware_path = None
+        self.addr2line_path = None
+        self.enabled = self.setup_paths()
+
+        if self.config.get("env:" + self.environment, "build_type") != "debug":
+            print(
+                """
+Please build project in debug configuration to get more details about an exception.
+See https://docs.platformio.org/page/projectconf/build_configurations.html
+
+"""
+            )
+
+        return self
+
+    def setup_paths(self):
+        self.project_dir = path_to_unicode(os.path.abspath(self.project_dir))
+        try:
+            data = load_project_ide_data(self.project_dir, self.environment)
+            self.firmware_path = data["prog_path"]
+            if not os.path.isfile(self.firmware_path):
+                sys.stderr.write(
+                    "%s: firmware at %s does not exist, rebuild the project?\n"
+                    % (self.__class__.__name__, self.firmware_path)
+                )
+                return False
+
+            cc_path = data.get("cc_path", "")
+            if "-gcc" in cc_path:
+                path = cc_path.replace("arm-none-eabi-gcc", "arm-none-eabi-addr2line")
+                print(path)
+                if os.path.isfile(path):
+                    self.addr2line_path = path
+                    return True
+        except PlatformioException as e:
+            sys.stderr.write(
+                "%s: disabling, exception while looking for addr2line: %s\n"
+                % (self.__class__.__name__, e)
+            )
+            return False
+        sys.stderr.write(
+            "%s: disabling, failed to find addr2line.\n" % self.__class__.__name__
+        )
+        return False
+
+    def rx(self, text):
+        if not self.enabled:
+            return text
+
+        last = 0
+        while True:
+            idx = text.find("\n", last)
+            if idx == -1:
+                if len(self.buffer) < 4096:
+                    self.buffer += text[last:]
+                break
+
+            line = text[last:idx]
+            if self.buffer:
+                line = self.buffer + line
+                self.buffer = ""
+            last = idx + 1
+
+            m = self.re.match(line.strip())
+            if m is None:
+                continue
+
+            trace = self.addr2line(m.group(2))
+            if trace:
+                text = text[: idx + 1] + trace + text[idx + 1 :]
+                last += len(trace)
+        return text
+
+    def addr2line(self, addr):
+        trace = ""
+        enc = "mbcs" if WINDOWS else "utf-8"
+        args = [self.addr2line_path, u"-fipC", u"-e", self.firmware_path]
+        if PY2:
+            args = [a.encode(enc) for a in args]
+        try:
+            if PY2:
+                addr = addr.encode(enc)
+            output = subprocess.check_output(args + [addr]).decode(enc).strip()
+            output = output.replace(
+                "\n", "\n     "
+            )  # newlines happen with inlined methods
+            output = self.strip_project_dir(output)
+            output = output.replace("\\", "/")
+            trace += "  %s in %s\n" % (addr, output)
+        except subprocess.CalledProcessError as e:
+            sys.stderr.write(
+                "%s: failed to call %s: %s\n"
+                % (self.__class__.__name__, self.addr2line_path, e)
+            )
+        return trace
+
+    def strip_project_dir(self, trace):
+        while True:
+            idx = trace.find(self.project_dir)
+            if idx == -1:
+                break
+            trace = trace[:idx] + trace[idx + len(self.project_dir) + 1 :]
+        return trace