Show a hexadecimal representation of the data (code point of each character) with `hexlify` filter

HISTORY.rst

@@ -25,6 +25,7 @@ PlatformIO Core 4
   - `Capture device monitor output to a file <https://docs.platformio.org/page/core/userguide/device/cmd_monitor.html#capture-output-to-a-file>`__ with ``log2file`` filter (`issue #670 <https://github.com/platformio/platformio-core/issues/670>`_)
   - Show a timestamp for each new line with ``time`` filter (`issue #981 <https://github.com/platformio/platformio-core/issues/981>`_)
   - Send a text to device on ENTER with ``send_on_enter`` filter (`issue #926 <https://github.com/platformio/platformio-core/issues/926>`_)
+  - Show a hexadecimal representation of the data (code point of each character) with ``hexlify`` filter
 
 * Added support for Arm Mbed "module.json" ``dependencies`` field (`issue #3400 <https://github.com/platformio/platformio-core/issues/3400>`_)
 * Improved support for Arduino "library.properties" ``depends`` field

platformio/commands/device/filters/hexlify.py

@@ -0,0 +1,38 @@
+# 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 serial
+
+from platformio.commands.device import DeviceMonitorFilter
+
+
+class Hexlify(DeviceMonitorFilter):
+    NAME = "hexlify"
+
+    def __init__(self, *args, **kwargs):
+        super(Hexlify, self).__init__(*args, **kwargs)
+        self._counter = 0
+
+    def rx(self, text):
+        result = ""
+        for b in serial.iterbytes(text):
+            if (self._counter % 16) == 0:
+                result += "\n{:04X} | ".format(self._counter)
+            asciicode = ord(b)
+            if asciicode <= 255:
+                result += "{:02X} ".format(asciicode)
+            else:
+                result += "?? "
+            self._counter += 1
+        return result