Fix the packet prefix

.pylintrc

@@ -52,7 +52,7 @@ confidence=
 # no Warning level messages displayed, use"--disable=all --enable=classes
 # --disable=W"
 # disable=import-error,print-statement,parameter-unpacking,unpacking-in-except,old-raise-syntax,backtick,long-suffix,old-ne-operator,old-octal-literal,import-star-module-level,raw-checker-failed,bad-inline-option,locally-disabled,locally-enabled,file-ignored,suppressed-message,useless-suppression,deprecated-pragma,apply-builtin,basestring-builtin,buffer-builtin,cmp-builtin,coerce-builtin,execfile-builtin,file-builtin,long-builtin,raw_input-builtin,reduce-builtin,standarderror-builtin,unicode-builtin,xrange-builtin,coerce-method,delslice-method,getslice-method,setslice-method,no-absolute-import,old-division,dict-iter-method,dict-view-method,next-method-called,metaclass-assignment,indexing-exception,raising-string,reload-builtin,oct-method,hex-method,nonzero-method,cmp-method,input-builtin,round-builtin,intern-builtin,unichr-builtin,map-builtin-not-iterating,zip-builtin-not-iterating,range-builtin-not-iterating,filter-builtin-not-iterating,using-cmp-argument,eq-without-hash,div-method,idiv-method,rdiv-method,exception-message-attribute,invalid-str-codec,sys-max-int,bad-python3-import,deprecated-string-function,deprecated-str-translate-call
-disable=print-statement,parameter-unpacking,unpacking-in-except,old-raise-syntax,backtick,long-suffix,old-ne-operator,old-octal-literal,import-star-module-level,raw-checker-failed,bad-inline-option,locally-disabled,locally-enabled,file-ignored,suppressed-message,useless-suppression,deprecated-pragma,apply-builtin,basestring-builtin,buffer-builtin,cmp-builtin,coerce-builtin,execfile-builtin,file-builtin,long-builtin,raw_input-builtin,reduce-builtin,standarderror-builtin,unicode-builtin,xrange-builtin,coerce-method,delslice-method,getslice-method,setslice-method,no-absolute-import,old-division,dict-iter-method,dict-view-method,next-method-called,metaclass-assignment,indexing-exception,raising-string,reload-builtin,oct-method,hex-method,nonzero-method,cmp-method,input-builtin,round-builtin,intern-builtin,unichr-builtin,map-builtin-not-iterating,zip-builtin-not-iterating,range-builtin-not-iterating,filter-builtin-not-iterating,using-cmp-argument,eq-without-hash,div-method,idiv-method,rdiv-method,exception-message-attribute,invalid-str-codec,sys-max-int,bad-python3-import,deprecated-string-function,deprecated-str-translate-call,import-error
+disable=print-statement,parameter-unpacking,unpacking-in-except,old-raise-syntax,backtick,long-suffix,old-ne-operator,old-octal-literal,import-star-module-level,raw-checker-failed,bad-inline-option,locally-disabled,locally-enabled,file-ignored,suppressed-message,useless-suppression,deprecated-pragma,apply-builtin,basestring-builtin,buffer-builtin,cmp-builtin,coerce-builtin,execfile-builtin,file-builtin,long-builtin,raw_input-builtin,reduce-builtin,standarderror-builtin,unicode-builtin,xrange-builtin,coerce-method,delslice-method,getslice-method,setslice-method,no-absolute-import,old-division,dict-iter-method,dict-view-method,next-method-called,metaclass-assignment,indexing-exception,raising-string,reload-builtin,oct-method,hex-method,nonzero-method,cmp-method,input-builtin,round-builtin,intern-builtin,unichr-builtin,map-builtin-not-iterating,zip-builtin-not-iterating,range-builtin-not-iterating,filter-builtin-not-iterating,using-cmp-argument,eq-without-hash,div-method,idiv-method,rdiv-method,exception-message-attribute,invalid-str-codec,sys-max-int,bad-python3-import,deprecated-string-function,deprecated-str-translate-call,import-error,bad-continuation
 
 # Enable the message, report, category or checker with the given id(s). You can
 # either give multiple identifier separated by comma (,) or put this option

adafruit_radio.py

@@ -41,9 +41,10 @@
 """
 import time
 import struct
-import random
+from micropython import const
 from adafruit_ble import BLERadio
-from adafruit_ble.advertising.adafruit import AdafruitRadio
+from adafruit_ble.advertising import Advertisement, LazyObjectField
+from adafruit_ble.advertising.standard import ManufacturerData
 
 
 __version__ = "0.0.0-auto.0"
@@ -56,6 +57,42 @@
 #: Amount of time to advertise a message (in seconds).
 AD_DURATION = 0.5
 
+_MANUFACTURING_DATA_ADT = const(0xFF)
+_ADAFRUIT_COMPANY_ID = const(0x0822)
+_RADIO_DATA_ID = const(0x0001)  # TODO: check this isn't already taken.
+
+
+class _RadioAdvertisement(Advertisement):
+    """Broadcast arbitrary bytes as a radio message."""
+
+    prefix = struct.pack("<BBH", 0x3, 0xFF, _ADAFRUIT_COMPANY_ID)
+    manufacturer_data = LazyObjectField(
+        ManufacturerData,
+        "manufacturer_data",
+        advertising_data_type=_MANUFACTURING_DATA_ADT,
+        company_id=_ADAFRUIT_COMPANY_ID,
+        key_encoding="<H",
+    )
+
+    @classmethod
+    def matches(cls, entry):
+        if len(entry.advertisement_bytes) < 6:
+            return False
+        # Check the key position within the manufacturer data. We already know
+        # prefix matches so we don't need to check it twice.
+        return struct.unpack_from("<H", entry.advertisement_bytes, 5)[0] == _RADIO_DATA_ID
+
+    @property
+    def msg(self):
+        """Raw radio data"""
+        if _RADIO_DATA_ID not in self.manufacturer_data.data:
+            return b""
+        return self.manufacturer_data.data[_RADIO_DATA_ID]
+
+    @msg.setter
+    def msg(self, value):
+        self.manufacturer_data.data[_RADIO_DATA_ID] = value
+
 
 class Radio:
     """
@@ -108,21 +145,12 @@ def send_bytes(self, message):
         """
         # Ensure length of message.
         if len(message) > MAX_LENGTH:
-            raise ValueError(
-                "Message too long (max length = {})".format(MAX_LENGTH)
-            )
-        advertisement = AdafruitRadio()
-        # Channel byte.
-        chan = struct.pack("<B", self._channel)
-        # "Unique" id byte (to avoid duplication when receiving messages in
-        # an AD_DURATION timeframe).
-        uid = struct.pack("<B", self.uid)
-        # Increment (and reset if needed) the uid.
-        self.uid += 1
-        if self.uid > 255:
-            self.uid = 0
+            raise ValueError("Message too long (max length = {})".format(MAX_LENGTH))
+        advertisement = _RadioAdvertisement()
         # Concatenate the bytes that make up the advertised message.
-        advertisement.msg = chan + uid + message
+        advertisement.msg = struct.pack("<BB", self._channel, self.uid) + message
+
+        self.uid = (self.uid + 1) % 255
         # Advertise (block) for AD_DURATION period of time.
         self.ble.start_advertising(advertisement)
         time.sleep(AD_DURATION)
@@ -138,8 +166,7 @@ def receive(self):
         msg = self.receive_full()
         if msg:
             return msg[0].decode("utf-8").replace("\x00", "")
-        else:
-            return None
+        return None
 
     def receive_full(self):
         """
@@ -158,7 +185,7 @@ def receive_full(self):
         """
         try:
             for entry in self.ble.start_scan(
-                AdafruitRadio, minimum_rssi=-255, timeout=1, extended=True
+                _RadioAdvertisement, minimum_rssi=-255, timeout=1, extended=True
             ):
                 # Extract channel and unique message ID bytes.
                 chan, uid = struct.unpack("<BB", entry.msg[:2])

docs/conf.py

@@ -2,18 +2,19 @@
 
 import os
 import sys
-sys.path.insert(0, os.path.abspath('..'))
+
+sys.path.insert(0, os.path.abspath(".."))
 
 # -- General configuration ------------------------------------------------
 
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
 extensions = [
-    'sphinx.ext.autodoc',
-    'sphinx.ext.intersphinx',
-    'sphinx.ext.napoleon',
-    'sphinx.ext.todo',
+    "sphinx.ext.autodoc",
+    "sphinx.ext.intersphinx",
+    "sphinx.ext.napoleon",
+    "sphinx.ext.todo",
 ]
 
 # TODO: Please Read!
@@ -23,29 +24,32 @@
 autodoc_mock_imports = ["digitalio", "busio", "adafruit_ble"]
 
 
-intersphinx_mapping = {'python': ('https://docs.python.org/3.4', None),'CircuitPython': ('https://circuitpython.readthedocs.io/en/latest/', None)}
+intersphinx_mapping = {
+    "python": ("https://docs.python.org/3.4", None),
+    "CircuitPython": ("https://circuitpython.readthedocs.io/en/latest/", None),
+}
 
 # Add any paths that contain templates here, relative to this directory.
-templates_path = ['_templates']
+templates_path = ["_templates"]
 
-source_suffix = '.rst'
+source_suffix = ".rst"
 
 # The master toctree document.
-master_doc = 'index'
+master_doc = "index"
 
 # General information about the project.
-project = u'Adafruit radio Library'
-copyright = u'2019 Nicholas H.Tollervey'
-author = u'Nicholas H.Tollervey'
+project = "Adafruit radio Library"
+copyright = "2019 Nicholas H.Tollervey"
+author = "Nicholas H.Tollervey"
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 #
 # The short X.Y version.
-version = u'1.0'
+version = "1.0"
 # The full version, including alpha/beta/rc tags.
-release = u'1.0'
+release = "1.0"
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
@@ -57,7 +61,7 @@
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
 # This patterns also effect to html_static_path and html_extra_path
-exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store', '.env', 'CODE_OF_CONDUCT.md']
+exclude_patterns = ["_build", "Thumbs.db", ".DS_Store", ".env", "CODE_OF_CONDUCT.md"]
 
 # The reST default role (used for this markup: `text`) to use for all
 # documents.
@@ -69,7 +73,7 @@
 add_function_parentheses = True
 
 # The name of the Pygments (syntax highlighting) style to use.
-pygments_style = 'sphinx'
+pygments_style = "sphinx"
 
 # If true, `todo` and `todoList` produce output, else they produce nothing.
 todo_include_todos = False
@@ -84,68 +88,70 @@
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
-on_rtd = os.environ.get('READTHEDOCS', None) == 'True'
+on_rtd = os.environ.get("READTHEDOCS", None) == "True"
 
 if not on_rtd:  # only import and set the theme if we're building docs locally
     try:
         import sphinx_rtd_theme
-        html_theme = 'sphinx_rtd_theme'
-        html_theme_path = [sphinx_rtd_theme.get_html_theme_path(), '.']
+
+        html_theme = "sphinx_rtd_theme"
+        html_theme_path = [sphinx_rtd_theme.get_html_theme_path(), "."]
     except:
-        html_theme = 'default'
-        html_theme_path = ['.']
+        html_theme = "default"
+        html_theme_path = ["."]
 else:
-    html_theme_path = ['.']
+    html_theme_path = ["."]
 
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['_static']
+html_static_path = ["_static"]
 
 # The name of an image file (relative to this directory) to use as a favicon of
 # the docs.  This file should be a Windows icon file (.ico) being 16x16 or 32x32
 # pixels large.
 #
-html_favicon = '_static/favicon.ico'
+html_favicon = "_static/favicon.ico"
 
 # Output file base name for HTML help builder.
-htmlhelp_basename = 'AdafruitRadioLibrarydoc'
+htmlhelp_basename = "AdafruitRadioLibrarydoc"
 
 # -- Options for LaTeX output ---------------------------------------------
 
 latex_elements = {
-     # The paper size ('letterpaper' or 'a4paper').
-     #
-     # 'papersize': 'letterpaper',
-
-     # The font size ('10pt', '11pt' or '12pt').
-     #
-     # 'pointsize': '10pt',
-
-     # Additional stuff for the LaTeX preamble.
-     #
-     # 'preamble': '',
-
-     # Latex figure (float) alignment
-     #
-     # 'figure_align': 'htbp',
+    # The paper size ('letterpaper' or 'a4paper').
+    #
+    # 'papersize': 'letterpaper',
+    # The font size ('10pt', '11pt' or '12pt').
+    #
+    # 'pointsize': '10pt',
+    # Additional stuff for the LaTeX preamble.
+    #
+    # 'preamble': '',
+    # Latex figure (float) alignment
+    #
+    # 'figure_align': 'htbp',
 }
 
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title,
 #  author, documentclass [howto, manual, or own class]).
 latex_documents = [
-    (master_doc, 'AdafruitradioLibrary.tex', u'Adafruitradio Library Documentation',
-     author, 'manual'),
+    (
+        master_doc,
+        "AdafruitradioLibrary.tex",
+        "Adafruitradio Library Documentation",
+        author,
+        "manual",
+    ),
 ]
 
 # -- Options for manual page output ---------------------------------------
 
 # One entry per manual page. List of tuples
 # (source start file, name, description, authors, manual section).
 man_pages = [
-    (master_doc, 'Adafruitradiolibrary', u'Adafruit radio Library Documentation',
-     [author], 1)
+    (master_doc, "Adafruitradiolibrary", "Adafruit radio Library Documentation", [author], 1)
 ]
 
 # -- Options for Texinfo output -------------------------------------------
@@ -154,7 +160,13 @@
 # (source start file, target name, title, author,
 #  dir menu entry, description, category)
 texinfo_documents = [
-    (master_doc, 'AdafruitradioLibrary', u'Adafruit radio Library Documentation',
-     author, 'AdafruitradioLibrary', 'One line description of project.',
-     'Miscellaneous'),
+    (
+        master_doc,
+        "AdafruitradioLibrary",
+        "Adafruit radio Library Documentation",
+        author,
+        "AdafruitradioLibrary",
+        "One line description of project.",
+        "Miscellaneous",
+    ),
 ]

examples/radio_simpletest.py

@@ -54,4 +54,3 @@
             # m = r.receive()
             # if m:
             #    print(m)
-

requirements.txt

@@ -1,2 +1 @@
-Adafruit-Blinka
-adafruit_ble
+adafruit-circuitpython-ble