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Add ESP8266 advanced info (#128) 

* Add ESP8266 advanced info

* Improve
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Otto Winter 2019-01-18 14:50:50 +01:00 committed by GitHub
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4
esphomeyaml/components/switch/index.rst
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@ -125,8 +125,8 @@ advanced stuff (see the full :doc:`API Reference </api/cover/index>` for more in
.. _switch-is_on_off_condition:
``switch.is_on`` / ``switch.is_off Condition
********************************************
``switch.is_on`` / ``switch.is_off`` Condition
**********************************************
This :ref:`condition <config-condition>` passes if the given switch is on/off.

94
esphomeyaml/devices/esp8266.rst
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@ -47,6 +47,100 @@ Some notes on the pins:
name: "Pin GPIO17"
pin: GPIO17
Special Pins
------------
.. table::
:class: no-center
=================== =============================================
``GPIO0`` Controls Boot Mode
------------------- ---------------------------------------------
``GPIO1`` UART TX pin
------------------- ---------------------------------------------
``GPIO2`` Controls Boot Mode
------------------- ---------------------------------------------
``GPIO3`` UART RX pin
------------------- ---------------------------------------------
``GPIO6`` SDIO/Flash CLK pin
------------------- ---------------------------------------------
``GPIO7`` SDIO/Flash Data 0 pin
------------------- ---------------------------------------------
``GPIO8`` SDIO/Flash Data 1 pin
------------------- ---------------------------------------------
``GPIO9`` SDIO/Flash Data 2 pin (qio/qout only)
------------------- ---------------------------------------------
``GPIO10`` SDIO/Flash Data 3 pin (qio/qout only)
------------------- ---------------------------------------------
``GPIO11`` SDIO/Flash CMD pin
------------------- ---------------------------------------------
``GPIO12`` Attached to Hardware SPI controller MISO
------------------- ---------------------------------------------
``GPIO13`` Attached to Hardware SPI controller MOSI
------------------- ---------------------------------------------
``GPIO14`` Attached to Hardware SPI controller CLK
------------------- ---------------------------------------------
``GPIO15`` Controls Boot Mode; Attached to Hardware SPI
controller CS
------------------- ---------------------------------------------
``GPIO16`` Special pin that can be accessed from RTC,
and is Deep-Sleep wakeup pin
------------------- ---------------------------------------------
TOUT aka ``GPIO17`` ADC pin for measuring voltages, can only be
used as analog input pin
=================== =============================================
Boot Modes
----------
On each boot, the ESP8266 will check three pins to determine in which boot mode to enter.
There are three boot modes:
.. table::
:class: no-center
========================= ========= ========= ========== ==============
**Mode** ``GPIO0`` ``GPIO2`` ``GPIO15`` ``boot mode:``
------------------------- --------- --------- ---------- --------------
Boot from Flash (normal) HIGH HIGH LOW 3
------------------------- --------- --------- ---------- --------------
Download Code from UART LOW HIGH LOW 1
------------------------- --------- --------- ---------- --------------
Boot from SD-Card ANY ANY HIGH 4-7
========================= ========= ========= ========== ==============
You can identify these on boot-up by looking at the UART output, the first number
in the ``boot mode:`` line tells you what mode was selected
.. code-block:: text
ets Jan 8 2013,rst cause:4, boot mode:(3,6)
The first lines when viewing the UART logs might have unrecognized characters. This is
because the ESP8266 bootloader uses a baudrate of 76800, whereas the use program uses 115200.
Reset Causes
------------
Additionally, the first line also contains the **reset cause**.
These reset causes `are documented <https://www.espressif.com/sites/default/files/documentation/esp8266_reset_causes_and_common_fatal_exception_causes_en.pdf>`__:
.. table::
:class: no-center
== ===================================
0 Undefined
-- -----------------------------------
1 Power On Reboot
-- -----------------------------------
2 External reset or deep-sleep wakeup
-- -----------------------------------
4 Hardware WDT reset
== ===================================
After a software reset, the reset cause will not change.
See Also
--------