Added links to examples in API documentation

docs/api/peripherals/spi_master.rst

@@ -105,6 +105,11 @@ on the transmission. For received data, use ``rx_data`` and set ``SPI_USE_RXDATA
 not touch the ``tx_buffer`` or ``rx_buffer`` members, because they use the same memory locations
 as ``tx_data`` and ``rx_data``.
 
+Application Example
+-------------------
+ 
+Display graphics on the ILI9341-based 320x240 LCD: `examples/peripherals/spi_master <https://github.com/espressif/esp-idf/tree/master/examples/peripherals/spi_master>`_.
+
 API Reference
 -------------
 

docs/api/peripherals/uart.rst

@@ -6,18 +6,16 @@ Overview
 
 `Instructions`_
 
+.. _Instructions: ../template.html
+
 Application Example
 -------------------
 
-`Instructions`_
+Configure uart settings and install uart driver to read/write using UART0 and UART1 interfaces: `examples/peripherals/uart <https://github.com/espressif/esp-idf/tree/master/examples/peripherals/uart>`_.
 
 API Reference
 -------------
 
-`Instructions`_
-
-.. _Instructions: ../template.html
-
 Header Files
 ^^^^^^^^^^^^
 

docs/api/system/deep_sleep.rst

@@ -87,3 +87,8 @@ The following function can be used to enter deep sleep once wakeup sources are c
 
 .. doxygenfunction:: esp_deep_sleep_start
 
+Application Example
+-------------------
+ 
+Implementation of basic functionality of deep sleep is shown in `protocols/sntp <https://github.com/espressif/esp-idf/tree/master/examples/protocols/sntp>`_ example, where ESP module is periodically waken up to retrive time from NTP server.
+

docs/api/system/log.rst

@@ -3,9 +3,11 @@
 Application Example
 -------------------
 
-`Instructions`_
-
-.. _Instructions: ../template.html
+Log library is commonly used by most of esp-idf components and examples. For demonstration of log functionality check `examples <https://github.com/espressif/esp-idf/tree/master/examples>`_ folder of `espressif/esp-idf <https://github.com/espressif/esp-idf>`_ repository, that among others, contains the following examples:
+ 
+* `system/ota <https://github.com/espressif/esp-idf/tree/master/examples/system/ota>`_ 
+* `storage/sd_card <https://github.com/espressif/esp-idf/tree/master/examples/storage/sd_card>`_ 
+* `protocols/https_request <https://github.com/espressif/esp-idf/tree/master/examples/protocols/https_request>`_ 
 
 API Reference
 -------------

docs/api/system/ota.rst

@@ -1,6 +1,11 @@
 OTA
 ===
 
+Application Example
+-------------------
+ 
+Demonstration of OTA (over the air) firmware update workflow: `examples/system/ota <https://github.com/espressif/esp-idf/tree/master/examples/system/ota>`_.
+
 API Reference
 -------------
 

docs/api/wifi/esp_wifi.rst

@@ -6,18 +6,16 @@ Overview
 
 `Instructions`_
 
+.. _Instructions: ../template.html
+
 Application Example
 -------------------
 
-`Instructions`_
+Simple code showing how to connect ESP32 module to an Access Point: `esp-idf-template <https://github.com/espressif/esp-idf-template>`_.
 
 API Reference
 -------------
 
-`Instructions`_
-
-.. _Instructions: ../template.html
-
 Header Files
 ^^^^^^^^^^^^