Merge branch 'current' into beta

Author: OttoWinter

components/display/ssd1306_i2c.rst

@@ -62,6 +62,10 @@ Configuration variables:
 - **pages** (*Optional*, list): Show pages instead of a single lambda. See :ref:`display-pages`.
 - **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
 
+.. note::
+
+    To speed up the display update process you can select higher i2c frequencies.
+
 See Also
 --------
 

components/i2c.rst

@@ -33,6 +33,7 @@ Configuration variables:
   Note that this can slow down startup and is only recommended for when setting up new sensors. Defaults to
   ``False``.
 - **frequency** (*Optional*, float): Set the frequency the i²c bus should operate on.
+  Defaults to ``50KHz``. Values are ``50KHz``, ``100KHz``, ``200KHz``, ... ``800KHz``
 
 .. note::
 

guides/faq.rst

@@ -196,7 +196,8 @@ Some steps that can help with the issue:
 - If you're using a hidden WiFi network, make sure to enable ``fast_connect`` mode in the WiFi
   configuration (also sometimes helps with non-hidden networks)
 - Give your ESP a :ref:`static IP <wifi-manual_ip>`.
-- Set the ``power_save_mode`` to ``light`` in the ``wifi:`` config. See :ref:`wifi-power_save_mode`.
+- Set the ``power_save_mode`` to ``light`` in the ``wifi:`` config (only helps in some cases,
+  in other it can make things works). See :ref:`wifi-power_save_mode`.
 - The issue seems to be happen with cheap boards more frequently. Especially the "cheap" NodeMCU
   boards from eBay sometimes have quite bad antennas.