Release 4.1.0.

New features
------------------
- No-WiFi build option SmingHub#2004 - get more resources if your application is not using WIFI.
- Multiple SSL adapters based on axTLS and BearSSL.  SmingHub#1999
- Added basic Crypto support library SmingHub#2014
- Updates framework to build using GCC 9.2.0 toolchain for C++17. SmingHub#1825
- Modbus master SmingHub#1992
- Implemented Small String Optimisation (SSO). SmingHub#1951
- Webcam stream and sample webcam web server. SmingHub#1981
- Allow HTTP connections to ignore rejected body content SmingHub#1928

Improvements
-------------------
- Some improvements to multipart parser SmingHub#2007
- Update ArduinoJson to 6.13.0 SmingHub#1979
- Added precaching from Arduino for ESP8266. SmingHub#1965
- Add support for 'Expect: 100-continue' in HTTP server. SmingHub#1931
- Upgrade to FlashString Library  SmingHub#1974, SmingHub#2013

Bug fixes
-------------
- Updated mqtt-codec to allow publish messages without payload. SmingHub#1976
- HttpConnection freed twice. SmingHub#1938
- Hangs at startup when custom heap enabled. SmingHub#1996
- Fix issues reported by valgrind SmingHub#2017

Breaking changes and Migration
-------------------------------------------
- See our [dedicated page](https://sming.readthedocs.io/en/latest/upgrading/4.0-4.1.html) for migration from 4.0.0 to 4.1.0.

All PRs scheduled for this release can be seen from [here](https://github.com/SmingHub/Sming/milestone/23)

.appveyor/build.cmd

@@ -2,7 +2,8 @@ REM Windows build script
 
 set SMING_HOME=%APPVEYOR_BUILD_FOLDER%\Sming
 
-if "%SMING_ARCH%" == "Esp8266" set ESP_HOME=c:\Espressif
+if "%build_compiler%" == "udk" set ESP_HOME=%UDK_ROOT%
+if "%build_compiler%" == "eqt" set ESP_HOME=%EQT_ROOT%
 
 cd %SMING_HOME%
 gcc -v

.appveyor/install.cmd

@@ -1,19 +1,28 @@
 REM Windows install script
 
+rmdir /s /q c:\MinGW
+curl -LO %SMINGTOOLS%/MinGW.7z
+7z -oC:\ x MinGW.7z
+
 goto :%SMING_ARCH%
 
 :Esp8266
 
-	choco install esp8266-udk --source https://www.myget.org/F/sming/ -y --no-progress
+	REM Old toolchain
+	set TOOLCHAIN=esp-udk-win32.7z
+	curl -LO %SMINGTOOLS%/%TOOLCHAIN%
+	7z -o%UDK_ROOT% x %TOOLCHAIN%
+
+	REM New toolchain
+	mkdir %EQT_ROOT%
+	set TOOLCHAIN=i686-w64-mingw32.xtensa-lx106-elf-a5c9861.1575819473.zip
+	curl -LO https://github.com/earlephilhower/esp-quick-toolchain/releases/download/3.0.0-gnu5/%TOOLCHAIN%
+	7z -o%EQT_ROOT% x %TOOLCHAIN%
 
 	goto :EOF
 
 
 :Host
 
-	REM Ensure MinGW installation is up to date
-	mingw-get update
-	mingw-get upgrade
-
 	goto :EOF
 

.gitignore

@@ -22,3 +22,5 @@ vssver2.scc
 
 .metadata
 .submodule
+
+sdk/

.gitmodules

@@ -19,9 +19,13 @@
 	url = https://github.com/jacketizer/libyuarel.git
 	ignore = dirty
 [submodule "multipart-parser"]
-	path = Sming/Components/MultipartParser/multipart-parser
+	path = Sming/Libraries/MultipartParser/multipart-parser
 	url = https://github.com/iafonov/multipart-parser-c.git
 	ignore = dirty
+[submodule "FlashString"]
+	path = Sming/Components/FlashString
+	url = https://github.com/mikee47/FlashString
+    ignore = dirty
 
 [submodule "esptool"]
 	path = Sming/Arch/Esp8266/Components/esptool/esptool
@@ -36,20 +40,24 @@
 	url = https://github.com/raburton/esptool2.git
 	ignore = dirty
 [submodule "libsodium"]
-	path = Sming/Components/libsodium/libsodium
+	path = Sming/Libraries/libsodium/libsodium
 	url = https://github.com/jedisct1/libsodium.git
 	ignore = dirty
 
 [submodule "ESP8266.new-pwm"]
-	path = Sming/Arch/Esp8266/Components/pwm_open/new-pwm
+	path = Sming/Arch/Esp8266/Components/driver/new-pwm
 	url = https://github.com/StefanBruens/ESP8266_new_pwm.git
 	ignore = dirty
-[submodule "ESP8266.axtls-8266"]
+[submodule "ESP8266.axtls"]
 	path = Sming/Components/axtls-8266/axtls-8266
 	url = https://github.com/igrr/axtls-8266.git
 	ignore = dirty
+[submodule "ESP8266.bearssl"]
+	path = Sming/Components/bearssl-esp8266/bearssl
+	url = https://github.com/earlephilhower/bearssl-esp8266
+	ignore = dirty
 [submodule "ESP8266.umm_malloc"]
-	path = Sming/Arch/Esp8266/Components/custom_heap/umm_malloc
+	path = Sming/Arch/Esp8266/Components/heap/umm_malloc
 	url = https://github.com/rhempel/umm_malloc.git
 	ignore = dirty
 [submodule "ESP8266.esp-open-lwip"]
@@ -122,3 +130,11 @@
 	path = Sming/Libraries/MCP_CAN_lib
 	url = https://github.com/coryjfowler/MCP_CAN_lib.git
 	ignore = dirty
+[submodule "Libraries.SmingTest"]
+	path = Sming/Libraries/SmingTest
+	url = https://github.com/mikee47/SmingTest
+	ignore = dirty
+[submodule "Libraries.ModbusMaster"]
+	path = Sming/Libraries/ModbusMaster/ModbusMaster
+	url = https://github.com/nomis/ModbusMaster.git
+	ignore = dirty

.travis.yml

@@ -1,15 +1,14 @@
 language: cpp
+os: linux
 env:
   global:
-  - SDK_BUILD=258
+  - SMINGTOOLS=https://github.com/SmingHub/SmingTools/releases/download/1.0
   - secure: D/cPk+sL2MNHLtfuU/rMiVN63+CTFpo9Chqa39LEH5VloGqC5f7RyIi2Maa3C/U2JQfM01HlsNR7E5bB0W8DQYbtzBDTqbZ4C7ppZRU5jCQ+L51ERKJ0EAV3KkaravQCRbWt3tlgOp6Xk6xaRMBaHEGrdbFjHYgEMPVteUQNr0A=
   - secure: pc8Yqwmn6AM+iBjLNNnknmOoi+AxoyvcVy128b2WXSdj6Q4bOIXgj4WUg8I52i1fgyh0Rxg19WUB6qSVyykCXVdSRajIU1MsKZI+0q44Q83wnwVeYm7nPWxDqS3FKMajucZCg4p0BTE4T6tpnm7zZNHduHnggua/NpP2h7B/Sqs=
   - secure: TX0IxYV3tTocCaJcgIA2xzJyHIzbxo7sAkLLYL+OITgWPD1VDUrEqEe7konQA5NIDJJ0VjoHxpdfti2LHG1fw45vrEMfBIOmZG6nW2gxD8ZS2G8KlYIxFB93oNNB6qJRHps1uIANk2hM+Ju6Pnqfc+lLh8oabs974ziAxoYuAJQ=
 jobs:
   include:
   - stage: test
-    os: linux
-    dist: xenial
     addons:
       apt:
         packages:
@@ -23,10 +22,23 @@ jobs:
         - graphviz-dev
         - xmlstarlet
         - jq
-    env: SMING_ARCH=Host
+    env:
+    - SMING_ARCH=Host
+
   - stage: build
-    os: linux
-    env: SMING_ARCH=Esp8266 SDK_VERSION=3.0.1
+    name: C++11
+    env:
+    - SMING_ARCH=Esp8266
+    - SDK_VERSION=3.0.1
+    - ESP_HOME=$TRAVIS_BUILD_DIR/opt/esp-alt-sdk
+
+  - stage: build
+    name: C++17
+    env:
+    - SMING_ARCH=Esp8266
+    - SDK_VERSION=3.0.1
+    - ESP_HOME=$TRAVIS_BUILD_DIR/opt/esp-quick-toolchain
+
 git:
   submodules: false
 addons:

.travis/build.sh

@@ -27,7 +27,6 @@ fi
 
 # Setup ARCH SDK paths
 if [ "$SMING_ARCH" == "Esp8266" ]; then
-	export ESP_HOME=$TRAVIS_BUILD_DIR/opt/esp-alt-sdk
 	export PATH=$PATH:$ESP_HOME/xtensa-lx106-elf/bin:$ESP_HOME/utils/
 fi
 

.travis/deploy.sh

@@ -21,8 +21,9 @@ RELEASE_ID=$(echo "$RESPONSE" | jq -r .id)
 # [Get all submodules used in this release, pack them and add the archive to the release artifacts]
 cd $SMING_HOME
 make submodules
-ALL_SUBMODULE_DIRS=$(find $SMING_HOME -name '.submodule' | xargs dirname)
+ALL_SUBMODULE_DIRS=$(find $SMING_HOME -name '.submodule' | xargs dirname | sed 's/^\(.*\)\/\(Sming\/.*\)$/\2/')
 FILE=/tmp/sming-submodules.tgz
+cd ../
 tar cvzf $FILE $ALL_SUBMODULE_DIRS
 
 curl -H "$AUTH_HEADER" -H "Content-Type: $(file -b --mime-type $FILE)" --data-binary @$FILE "https://uploads.github.com/repos/SmingHub/Sming/releases/$RELEASE_ID/assets?name=$(basename $FILE)"

.travis/install.sh

@@ -9,11 +9,19 @@ if [ "$TRAVIS_BUILD_STAGE_NAME" == "Test" ]; then
 fi
 
 if [ "$SMING_ARCH" == "Esp8266" ]; then
-	mkdir -p $TRAVIS_BUILD_DIR/opt/esp-alt-sdk
-
 	if [ "$TRAVIS_OS_NAME" == "linux" ]; then
-	  wget --no-verbose https://github.com/nodemcu/nodemcu-firmware/raw/2d958750b56fc60297f564b4ec303e47928b5927/tools/esp-open-sdk.tar.xz
-	  tar -Jxvf esp-open-sdk.tar.xz; ln -s $(pwd)/esp-open-sdk/xtensa-lx106-elf $TRAVIS_BUILD_DIR/opt/esp-alt-sdk/.
+		# Old toolchain
+		TOOLCHAIN=esp-open-sdk-linux-x86_64.tar.gz
+		wget --no-verbose $SMINGTOOLS/$TOOLCHAIN
+	  	tar -zxf $TOOLCHAIN
+		mkdir -p $TRAVIS_BUILD_DIR/opt/esp-alt-sdk
+		ln -s $(pwd)/esp-open-sdk/xtensa-lx106-elf $TRAVIS_BUILD_DIR/opt/esp-alt-sdk/.
+
+		# New toolchain
+		TOOLCHAIN=x86_64-linux-gnu.xtensa-lx106-elf-a5c9861.1575819473.tar.gz
+		wget --no-verbose https://github.com/earlephilhower/esp-quick-toolchain/releases/download/3.0.0-gnu5/$TOOLCHAIN
+		mkdir -p opt/esp-quick-toolchain
+	  	tar -zxf $TOOLCHAIN -C opt/esp-quick-toolchain --totals
 	fi
 
 fi # Esp8266

Readme.md → README.md

@@ -46,7 +46,7 @@ Table of Contents
    * [Financial contributions](#financial-contributions)
       * [Backers and sponsors](#backers-and-sponsors)
 
-Please note **develop** branch documentation is at [sming.readthedocs.io](https://sming.readthedocs.io/).
+Please note Version 4 documentation is at [sming.readthedocs.io](https://sming.readthedocs.io/).
 
 ## Summary
 
@@ -60,14 +60,15 @@ Please note **develop** branch documentation is at [sming.readthedocs.io](https:
     * Async TCP and UDP stack based on [LWIP](http://savannah.nongnu.org/projects/lwip/).
     * With clients supporting: HTTP, MQTT, WebSockets and SMTP.
     * And servers for: DNS, FTP, HTTP(+ WebSockets), Telnet.
-    * With SSL support for all network clients and servers based on [axTLS 2.1+](https://github.com/igrr/axtls-8266) with [Lwirax](https://github.com/attachix/lwirax/).
+    * With [SSL support](https://sming.readthedocs.io/en/latest/framework/core/network/ssl.html) for all network clients and servers. Based on [axTLS](http://axtls.sourceforge.net/) and [BearSSL](https://www.bearssl.org/).
     * Out of the box support for OTA over HTTPS.
 * ESP8266 specific features.
     * Integrated boot loader [rboot](https://sming.readthedocs.io/en/latest/_inc/Sming/Components/rboot/index.html) with support for 1MB ROMs, OTA firmware updating and ROM switching.
-    * [Crash handlers](https://sming.readthedocs.io/en/latest/information/debugging.html) for analyzing/handling system restarts due to fatal errors or WDT resets.
-    * [PWM support](https://sming.readthedocs.io/en/latest/_inc/Sming/Arch/Esp8266/Components/pwm_open/index.html) based on [Stefan Bruens PWM](https://github.com/StefanBruens/ESP8266_new_pwm.git).
-    * Optional [custom heap allocation](https://sming.readthedocs.io/en/latest/_inc/Sming/Arch/Esp8266/Components/custom_heap/index.html) based on [Umm Malloc](https://github.com/rhempel/umm_malloc.git).
+    * [Crash handlers](https://sming.readthedocs.io/en/latest/information/debugging/index.html) for analyzing/handling system restarts due to fatal errors or WDT resets.
+    * [PWM support](https://sming.readthedocs.io/en/latest/_inc/Sming/Arch/Esp8266/Components/driver/index.html) based on [Stefan Bruens PWM](https://github.com/StefanBruens/ESP8266_new_pwm.git).
+    * Optional [custom heap allocation](https://sming.readthedocs.io/en/latest/_inc/Sming/Arch/Esp8266/Components/heap/index.html) based on [Umm Malloc](https://github.com/rhempel/umm_malloc.git).
     * Based on Espressif NONOS SDK. Officially suppored NON SDK version is >= 3.0.1.
+    * Support for a [thin No-Wifi-SDK](https://sming.readthedocs.io/en/latest/_inc/Sming/Arch/Esp8266/Components/esp_no_wifi/index.html). Helpful when a project does not require WiFi (or networking) and reduces code size and memory usage signficantly.
 * Linux/Windows features
     * Sming has a [host emulator](https://sming.readthedocs.io/en/latest/arch/host/host-emulator.html) that allows libraries and sample applications to be compiled on a Linux/Windows host system and be tested before uploading them to an actual microcontroller.
 
@@ -94,7 +95,7 @@ Linux and Windows OSes with gcc compilers are supported. Clang is NOT supported.
 
 ### Stable
 
-- [Sming V4.0.0](https://github.com/SmingHub/Sming/releases/tag/4.0.0) - great new features, performance and stability improvements.
+- [Sming V4.1.0](https://github.com/SmingHub/Sming/releases/tag/4.1.0) - great new features, performance and stability improvements.
 - [Sming V3.8.1 LTS](https://github.com/SmingHub/Sming/releases/tag/3.8.1) - suitable for older applications that are not yet migrated to Sming v4.x.x.
 Long Term Support (LTS) is available till 1st of April, 2020.
 
@@ -346,8 +347,7 @@ See [LiveDebug sample](samples/LiveDebug/) for details.
 ## Contribute
 
 You can contribute to Sming by
-- Providing Pull Requests with new features, bug fixes, new ideas, etc.
-Make sure to follow our [Coding-Style-Rules](https://github.com/SmingHub/Sming/wiki/Coding-Style-Rules). Read our [Contributing guide](https://github.com/SmingHub/Sming/blob/develop/CONTRIBUTING.md) for details.
+- Providing Pull Requests with new features, bug fixes, new ideas, etc. See [Contributing](https://smingdev.readthedocs.io/en/latest/contribute/index.html) for details.
 - Testing our latest source code and reporting issues.
 - Supporting us financially to acquire hardware for testing and implementing or out of gratitude
 

Sming/Arch/Esp8266/Components/driver/README.rst

@@ -3,30 +3,8 @@ Esp8266 Drivers
 
 Provides low-level peripheral drivers.
 
-* UART: Custom asynchronous driver
-* PWM: Common header for PWM support
-* hw_timer: Driver for hardware timers
-
 .. toctree::
+   :glob:
+   :maxdepth: 1
 
-   i2s
-
-hw_timer
---------
-
-
-.. envvar:: USE_US_TIMER
-
-   0 (default): Use default /256 prescale for Timer2
-   1: Use /16 prescale
-
-   The following functions depend on Timer2:
-   - NOW() return value, the Timer2 tick count
-   - Software timers
-   - System time
-
-   Software timers are driven by Timer2, which by default uses a /256 prescale
-   providing a resolution of 3.2us and a range of 1' 54".
-
-   Enabling this setting increases the resolution to 200ns but reduces the maximum
-   software timer to 7" 9.5s.
+   *

Sming/Arch/Esp8266/Components/driver/component.mk

@@ -1,8 +1,27 @@
-COMPONENT_DEPENDS := esp8266
+COMPONENT_DEPENDS			:= esp8266
 
-#
-COMPONENT_VARS	= USE_US_TIMER
-USE_US_TIMER	?= 1
+COMPONENT_SRCDIRS			:= .
+COMPONENT_INCDIRS			:= include
+
+COMPONENT_DOXYGEN_INPUT		:= include/driver
+
+COMPONENT_DOXYGEN_PREDEFINED := \
+	ENABLE_CUSTOM_PWM=1
+
+# hw_timer
+COMPONENT_VARS				+= USE_US_TIMER
+USE_US_TIMER				?= 1
 ifeq ($(USE_US_TIMER),1)
-GLOBAL_CFLAGS	+= -DUSE_US_TIMER
+GLOBAL_CFLAGS				+= -DUSE_US_TIMER
+endif
+
+# PWM
+COMPONENT_RELINK_VARS		+= ENABLE_CUSTOM_PWM
+ENABLE_CUSTOM_PWM			?= 1
+ifeq ($(ENABLE_CUSTOM_PWM), 1)
+	COMPONENT_SUBMODULES	+= new-pwm
+	COMPONENT_SRCDIRS		+= new-pwm
+	COMPONENT_CFLAGS		+= -DSDK_PWM_PERIOD_COMPAT_MODE=1
+else
+	LIBS					+= pwm
 endif

Sming/Arch/Esp8266/Components/driver/gpio.rst

@@ -0,0 +1,7 @@
+GPIO: General-Purpose I/O
+=========================
+
+SDK definitions for GPIO.
+
+.. doxygengroup:: gpio_driver
+   :content-only: