Added OTA helper

ESP_OTA.py

@@ -0,0 +1,87 @@
+#!/usr/bin/env python3
+
+#
+# The MIT License (MIT)
+# Copyright (c) 2015-2017 François GUILLIER <dev @ guillier . org>
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+# The arduino software must be loaded and sketch compiled
+# before lauching this software !
+
+
+# http://esp8266.github.io/Arduino/versions/2.3.0/doc/ota_updates/readme.html
+
+from http.server import BaseHTTPRequestHandler, HTTPServer
+from urllib import parse
+import hashlib
+import os
+import sys
+
+# HTTPRequestHandler class
+class RequestHandler(BaseHTTPRequestHandler):
+
+  # GET
+  def do_GET(self):
+        parsed_path = parse.urlparse(self.path)
+        print(parsed_path, self.path)
+
+        m = hashlib.md5()
+        try:
+            with open('/tmp/{}{}'.format(build_dir, parsed_path.path), 'rb') as f:
+                firmware = f.read()
+
+            m.update(firmware);
+            print('local firmware: ' + m.hexdigest())
+        except:
+            print("""Can't load local firmware""")
+            return
+
+
+        for name, value in self.headers.items():
+            #print(name, value)
+            if name[:10] == 'x-ESP8266-':
+                print(name[10:], '->', value)
+
+        if self.headers.get('x-ESP8266-version') == m.hexdigest():
+            self.send_response(304)
+            return
+
+        # Send response status code
+        self.send_response(200)
+
+        # Send headers
+        self.send_header('Content-type','application/octet-stream')
+        self.send_header('Content-Disposition','attachment; filename=firmware.ino')
+        self.send_header('Content-Length', len(firmware))
+        self.end_headers()
+
+        self.wfile.write(firmware)
+        return
+
+build_dir = ""
+for d in os.listdir('/tmp'):
+    if d[:14] == 'arduino_build_' and d > build_dir:
+        build_dir = d
+
+if len(build_dir) == 0:
+    print("""Can't find Arduino Build Directory""")
+    sys.exit(1)
+
+server_address = ('0.0.0.0', 8888)
+httpd = HTTPServer(server_address, RequestHandler)
+print('running server...')
+httpd.serve_forever()

readme.md

@@ -10,5 +10,9 @@ Hardware used :
 
 ![Schematics](teleinfo-esp8266_bb.png)
 
+* Version "Historique" (i.e. compatible with older meters) only for the moment
+* Version "Standard" (a.k.a new Linky version) to be written 
+
+The python OTA helper can be used to upgrade the software on the ESP8266
 
 Corresponding blog entry: http://www.guillier.org/blog/2017/xxxxxxx