diff --git a/app/main.py b/app/main.py
new file mode 100644
index 0000000..7513fd9
--- /dev/null
+++ b/app/main.py
@@ -0,0 +1,86 @@
+#!/usr/bin/env python
+
+import logging
+import os
+
+import flask
+import flask_socketio
+
+import hid
+import js_to_hid
+
+root_logger = logging.getLogger()
+handler = logging.StreamHandler()
+formatter = logging.Formatter(
+    '%(asctime)s %(name)-15s %(levelname)-4s %(message)s', '%Y-%m-%d %H:%M:%S')
+handler.setFormatter(formatter)
+root_logger.addHandler(flask.logging.default_handler)
+root_logger.setLevel(logging.INFO)
+
+app = flask.Flask(__name__, static_url_path='')
+socketio = flask_socketio.SocketIO(app)
+
+logger = logging.getLogger(__name__)
+logger.info('Starting app')
+
+host = os.environ.get('HOST', '0.0.0.0')
+port = int(os.environ.get('PORT', 8000))
+debug = 'DEBUG' in os.environ
+# Location of HID file handle in which to write keyboard HID input.
+hid_path = os.environ.get('HID_PATH', '/dev/hidg0')
+
+
+def _parse_key_event(payload):
+    return js_to_hid.JavaScriptKeyEvent(meta_modifier=payload['metaKey'],
+                                        alt_modifier=payload['altKey'],
+                                        shift_modifier=payload['shiftKey'],
+                                        ctrl_modifier=payload['ctrlKey'],
+                                        key=payload['key'],
+                                        key_code=payload['keyCode'])
+
+
+@socketio.on('keystroke')
+def socket_keystroke(message):
+    key_event = _parse_key_event(message)
+    hid_keycode = None
+    success = False
+    try:
+        control_keys, hid_keycode = js_to_hid.convert(key_event)
+    except js_to_hid.UnrecognizedKeyCodeError:
+        logger.warning('Unrecognized key: %s (keycode=%d)', key_event.key,
+                       key_event.key_code)
+    if hid_keycode is None:
+        logger.info('Ignoring %s key (keycode=%d)', key_event.key,
+                    key_event.key_code)
+    else:
+        hid.send(hid_path, control_keys, hid_keycode)
+        success = True
+
+    socketio.emit('keystroke-received', {'success': success})
+
+
+@socketio.on('connect')
+def test_connect():
+    logger.info('Client connected')
+
+
+@socketio.on('disconnect')
+def test_disconnect():
+    logger.info('Client disconnected')
+
+
+@app.route('/', methods=['GET'])
+def index_get():
+    return flask.render_template('index.html')
+
+
+if __name__ == '__main__':
+    socketio.run(app,
+                 host=host,
+                 port=port,
+                 debug=debug,
+                 use_reloader=True,
+                 extra_files=[
+                     './app/templates/index.html', './app/static/js/app.js',
+                     './app/static/css/style.css'
+                 ])