Merge branch 'master' into vvidf/v4.1

* master:
  M5Stack's product offering includes various ESP32-based camera devices. (espressif#4030)
  Fix for issue 3974 m_connectedCount incorrectly decremented when no connection exists
  Add a new board of KITS for IoT education (espressif#3703)
  update M5Camera pins (espressif#4021)
  Update SD_MMC.cpp (espressif#4020)
  Added missing wifi_provisioning dependency. (espressif#4003)
  HardwareSerial bugfix & improvement (espressif#3713)
  Allow using custom linker scripts (espressif#3735)
  Add M5Stack-ATOM Board (espressif#3883)
  Minor modifications in provisioning (espressif#3919)
  Add support of unified provisioning to Arduino
  Update install-platformio-esp32.sh
  add new board Handbit  (espressif#3807)
  Move _STREAM_BOUNDARY before _STREAM_PART (espressif#3720)
  Add Senses's WEIZEN board from Senses IoT platform (espressif#3687)
  Revert "std::shared_ptr Memory Leak (espressif#3680)" (espressif#3682)
  std::shared_ptr Memory Leak (espressif#3680)
  Minimize HardwareSerial Receive and Transmit delays (espressif#3664)
  fix removeApbChangeCallback() error in spiStopBus() (espressif#3675)

# Conflicts:
#	CMakeLists.txt

Author: Victor Ho

Diff for: .github/scripts/install-platformio-esp32.sh

@@ -9,7 +9,7 @@ echo "Installing PlatformIO ..."
 pip install -U https://github.com/platformio/platformio/archive/develop.zip > /dev/null 2>&1
 
 echo "Installing Platform ESP32 ..."
-python -m platformio platform install https://github.com/platformio/platform-espressif32.git#feature/stage > /dev/null 2>&1
+python -m platformio platform install https://github.com/platformio/platform-espressif32.git > /dev/null 2>&1
 
 echo "Replacing the framework version ..."
 if [[ "$OSTYPE" == "darwin"* ]]; then

Diff for: .gitignore

@@ -12,3 +12,4 @@ tools/mkspiffs/mkspiffs.exe
 .vs/
 __vm/
 *.vcxproj*
+.vscode/

Diff for: CMakeLists.txt

@@ -71,13 +71,74 @@ set(LIBRARY_SRCS
   libraries/WiFi/src/WiFi.cpp
   libraries/WiFi/src/WiFiGeneric.cpp
   libraries/WiFi/src/WiFiMulti.cpp
+  libraries/WiFi/src/WiFiProv.cpp
   libraries/WiFi/src/WiFiScan.cpp
   libraries/WiFi/src/WiFiServer.cpp
   libraries/WiFi/src/WiFiSTA.cpp
   libraries/WiFi/src/WiFiUdp.cpp
   libraries/Wire/src/Wire.cpp
   )
 
+set(AZURE_SRCS
+  libraries/AzureIoT/src/az_iot/azureiotcerts.c
+  libraries/AzureIoT/src/az_iot/c-utility/pal/agenttime.c
+  libraries/AzureIoT/src/az_iot/c-utility/pal/dns_async.c
+  libraries/AzureIoT/src/az_iot/c-utility/pal/freertos/lock.c
+  libraries/AzureIoT/src/az_iot/c-utility/pal/freertos/threadapi.c
+  libraries/AzureIoT/src/az_iot/c-utility/pal/freertos/tickcounter.c
+  libraries/AzureIoT/src/az_iot/c-utility/pal/lwip/sntp_lwip.c
+  libraries/AzureIoT/src/az_iot/c-utility/pal/socket_async.c
+  libraries/AzureIoT/src/az_iot/c-utility/pal/src/platform_openssl_compact.c
+  libraries/AzureIoT/src/az_iot/c-utility/pal/src/tlsio_openssl_compact.c
+  libraries/AzureIoT/src/az_iot/c-utility/pal/tlsio_options.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/base64.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/buffer.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/connection_string_parser.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/consolelogger.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/constbuffer.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/constmap.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/crt_abstractions.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/doublylinkedlist.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/gballoc.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/gb_stdio.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/gb_time.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/hmac.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/hmacsha256.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/httpapiex.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/httpapiexsas.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/httpheaders.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/http_proxy_io.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/map.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/optionhandler.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/sastoken.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/sha1.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/sha224.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/sha384-512.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/singlylinkedlist.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/strings.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/string_tokenizer.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/urlencode.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/usha.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/vector.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/xio.c
+  libraries/AzureIoT/src/az_iot/c-utility/src/xlogging.c
+  libraries/AzureIoT/src/az_iot/iothub_client/src/blob.c
+  libraries/AzureIoT/src/az_iot/iothub_client/src/iothub_client_authorization.c
+  libraries/AzureIoT/src/az_iot/iothub_client/src/iothub_client.c
+  libraries/AzureIoT/src/az_iot/iothub_client/src/iothub_client_ll.c
+  libraries/AzureIoT/src/az_iot/iothub_client/src/iothub_client_retry_control.c
+  libraries/AzureIoT/src/az_iot/iothub_client/src/iothub_message.c
+  libraries/AzureIoT/src/az_iot/iothub_client/src/iothubtransport.c
+  libraries/AzureIoT/src/az_iot/iothub_client/src/iothubtransportmqtt.c
+  libraries/AzureIoT/src/az_iot/iothub_client/src/iothubtransport_mqtt_common.c
+  libraries/AzureIoT/src/az_iot/iothub_client/src/version.c
+  libraries/AzureIoT/src/az_iot/umqtt/src/mqtt_client.c
+  libraries/AzureIoT/src/az_iot/umqtt/src/mqtt_codec.c
+  libraries/AzureIoT/src/az_iot/umqtt/src/mqtt_message.c
+  libraries/AzureIoT/src/AzureIotHub.cpp
+  libraries/AzureIoT/src/Esp32MQTTClient.cpp
+  )
+
 set(BLE_SRCS
   libraries/BLE/src/BLE2902.cpp
   libraries/BLE/src/BLE2904.cpp
@@ -110,13 +171,14 @@ set(BLE_SRCS
   libraries/BLE/src/GeneralUtils.cpp
   )
 
-set(COMPONENT_SRCS ${CORE_SRCS} ${LIBRARY_SRCS} ${BLE_SRCS})
+set(COMPONENT_SRCS ${CORE_SRCS} ${LIBRARY_SRCS} ${AZURE_SRCS} ${BLE_SRCS})
 
 set(COMPONENT_ADD_INCLUDEDIRS
   variants/esp32/
   cores/esp32/
   libraries/ArduinoOTA/src
   libraries/AsyncUDP/src
+  libraries/AzureIoT/src
   libraries/BLE/src
   libraries/BluetoothSerial/src
   libraries/DNSServer/src
@@ -144,7 +206,12 @@ set(COMPONENT_ADD_INCLUDEDIRS
 
 set(COMPONENT_PRIV_INCLUDEDIRS cores/esp32/libb64)
 
-set(COMPONENT_REQUIRES spi_flash mbedtls mdns esp_adc_cal)
+set(COMPONENT_REQUIRES spi_flash mbedtls mdns ethernet esp_adc_cal wifi_provisioning)
 set(COMPONENT_PRIV_REQUIRES fatfs nvs_flash app_update spiffs bootloader_support openssl bt)
 
 register_component()
+
+set_source_files_properties(libraries/AzureIoT/src/az_iot/iothub_client/src/iothubtransport_mqtt_common.c
+    PROPERTIES COMPILE_FLAGS
+    -Wno-maybe-uninitialized
+)