diff --git a/.github/workflows/ci-esp32.yml b/.github/workflows/ci-esp32.yml
index f849ea2033..37b7cf1db1 100644
--- a/.github/workflows/ci-esp32.yml
+++ b/.github/workflows/ci-esp32.yml
@@ -21,6 +21,10 @@ jobs:
             idf_version: "4.3"
           - variant: esp32c2
             idf_version: "4.4"
+          - idf_version: "4.3"
+            os: windows-latest
+          - idf_version: "5.0"
+            os: windows-latest
 
     concurrency: 
       group: ${{ github.workflow }}-${{ github.ref }}-${{ toJson(matrix) }}
diff --git a/.github/workflows/library.yml b/.github/workflows/library.yml
index 55c26fd07c..44c6f6c4f8 100644
--- a/.github/workflows/library.yml
+++ b/.github/workflows/library.yml
@@ -22,7 +22,8 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest]
-        variant: [esp8266, host, esp32, esp32s2, esp32c3, rp2040]
+        variant: [esp8266, host, esp32, esp32s2, esp32c3, esp32s3, esp32c2, rp2040]
+        idf_version: ["4.4", ""] # "" denotes default, currently 5.2
         include:
           - variant: esp8266
             arch: Esp8266
@@ -34,8 +35,21 @@ jobs:
             arch: Esp32
           - variant: esp32c3
             arch: Esp32
+          - variant: esp32s3
+            arch: Esp32
+          - variant: esp32c2
+            arch: Esp32
           - variant: rp2040
             arch: Rp2040
+        exclude:
+          - variant: esp32c2
+            idf_version: "4.4"
+          - variant: esp8266
+            idf_version: "4.4"
+          - variant: host
+            idf_version: "4.4"
+          - variant: rp2040
+            idf_version: "4.4"
 
     concurrency: 
       group: ${{ github.workflow }}-${{ github.ref }}-${{ toJson(matrix) }}
@@ -43,6 +57,11 @@ jobs:
 
     runs-on: ${{ matrix.os }}
 
+    env:
+      SMING_ARCH: ${{ matrix.arch }}
+      SMING_SOC: ${{ matrix.variant }}
+      INSTALL_IDF_VER: ${{ matrix.idf_version }}
+
     steps:
     - name: Fix autocrlf setting
       run: |
@@ -72,8 +91,6 @@ jobs:
         "SMING_HOME=" + (Resolve-Path "../../sming/Sming").path >> $env:GITHUB_ENV
         "COMPONENT_SEARCH_DIRS=" + (Resolve-Path "..").path >> $env:GITHUB_ENV
         "CI_MAKEFILE=" + (Resolve-Path "../../sming/Tools/ci/library/Makefile") >> $env:GITHUB_ENV
-        "SMING_ARCH=${{ matrix.arch }}" >> $env:GITHUB_ENV
-        "SMING_SOC=${{ matrix.variant }}" >> $env:GITHUB_ENV
 
     - name: Install build tools for Ubuntu
       if: ${{ matrix.os ==  'ubuntu-latest' }}
diff --git a/Sming/Arch/Esp32/README.rst b/Sming/Arch/Esp32/README.rst
index 9de7952ad8..431f15967e 100644
--- a/Sming/Arch/Esp32/README.rst
+++ b/Sming/Arch/Esp32/README.rst
@@ -108,9 +108,9 @@ IDF versions
 
 Sming currently supports IDF versions 4.3, 4.4, 5.0 and 5.2.
 
-The default installed IDF version is 4.4. This can be changed as follows::
+The default installed IDF version is 5.2. This can be changed as follows::
 
-    INSTALL_IDF_VER=5.2 $SMING_HOME/../Tools/install.sh esp32
+    INSTALL_IDF_VER=4.4 $SMING_HOME/../Tools/install.sh esp32
 
 The installation script creates a soft-link in ``/opt/esp-idf`` pointing to the last version installed.
 Use the `IDF_PATH` environment variable or change the soft-link to select which one to use.
diff --git a/Sming/Arch/Esp32/Tools/install.cmd b/Sming/Arch/Esp32/Tools/install.cmd
index cba5358357..8e758a62de 100644
--- a/Sming/Arch/Esp32/Tools/install.cmd
+++ b/Sming/Arch/Esp32/Tools/install.cmd
@@ -4,7 +4,7 @@ if "%IDF_PATH%"=="" goto :EOF
 if "%IDF_TOOLS_PATH%"=="" goto :EOF
 
 if "%IDF_REPO%"=="" set IDF_REPO="https://github.com/mikee47/esp-idf.git"
-if "%INSTALL_IDF_VER%"=="" set INSTALL_IDF_VER=4.4
+if "%INSTALL_IDF_VER%"=="" set INSTALL_IDF_VER=5.2
 set IDF_BRANCH="sming/release/v%INSTALL_IDF_VER%"
 
 git clone -b %IDF_BRANCH% %IDF_REPO% %IDF_PATH%
diff --git a/Sming/Arch/Esp32/Tools/install.sh b/Sming/Arch/Esp32/Tools/install.sh
index 0667e28704..a495ea2a73 100755
--- a/Sming/Arch/Esp32/Tools/install.sh
+++ b/Sming/Arch/Esp32/Tools/install.sh
@@ -36,7 +36,7 @@ if [ ! -L "$IDF_PATH" ] && [ -d "$IDF_PATH" ]; then
     mv "$IDF_PATH" "$IDF_PATH-old"
 fi
 
-INSTALL_IDF_VER="${INSTALL_IDF_VER:=4.4}"
+INSTALL_IDF_VER="${INSTALL_IDF_VER:=5.2}"
 IDF_CLONE_PATH="$(readlink -m "$IDF_PATH/..")/esp-idf-${INSTALL_IDF_VER}"
 IDF_REPO="${IDF_REPO:=https://github.com/mikee47/esp-idf.git}"
 IDF_BRANCH="sming/release/v${INSTALL_IDF_VER}"
diff --git a/Sming/Arch/Esp32/app.mk b/Sming/Arch/Esp32/app.mk
index 6cc8658584..f06d8165a6 100644
--- a/Sming/Arch/Esp32/app.mk
+++ b/Sming/Arch/Esp32/app.mk
@@ -21,8 +21,16 @@ ifdef IDF_TARGET_ARCH_RISCV
 		--specs=nosys.specs
 endif
 
+
 .PHONY: application
 application: $(TARGET_BIN)
+ifeq ($(IDF_VERSION),v4.3)
+	@printf "\033[47;1;31mWARNING! ESP-IDF 4.3 reached 'End of Life' in December 2023.\033[0m Upgrade to v5.2 recommended.\n"
+else ifeq ($(IDF_VERSION),v4.4)
+	@printf "\033[47;1;31mWARNING! ESP-IDF 4.4 support ends August 2024!\033[0m Upgrade to v5.2 recommended.\n"
+else ifeq ($(IDF_VERSION),v5.0)
+	@printf "\033[47;1;34mNOTE! ESP-IDF 5.0 not recommended for new designs.\033[0m Please consider upgrading to v5.2.\n"
+endif
 
 $(TARGET_OUT): $(COMPONENTS_AR)
 	$(info $(notdir $(PROJECT_DIR)): Linking $@)
diff --git a/Sming/Arch/Esp8266/Tools/install.cmd b/Sming/Arch/Esp8266/Tools/install.cmd
index 33ec662a42..3c20108241 100644
--- a/Sming/Arch/Esp8266/Tools/install.cmd
+++ b/Sming/Arch/Esp8266/Tools/install.cmd
@@ -1,9 +1,8 @@
 REM Esp8266 install.cmd
 
-call :install "%ESP_HOME%" x86_64-w64-mingw32.xtensa-lx106-elf-e6a192b.201211.zip
-goto :EOF
+set EQT_REPO=https://github.com/earlephilhower/esp-quick-toolchain/releases/download/3.2.0-gcc10.3
+set EQT_TOOLCHAIN=x86_64-w64-mingw32.xtensa-lx106-elf-c791b74.230224.zip
 
-:install
-mkdir %1
-curl -Lo %DOWNLOADS%/%2 %SMINGTOOLS%/%2
-7z -o%1 x %DOWNLOADS%/%2
+mkdir %ESP_HOME%
+curl -Lo %DOWNLOADS%/%EQT_TOOLCHAIN% %EQT_REPO%/%EQT_TOOLCHAIN%
+7z -o%ESP_HOME% x %DOWNLOADS%/%EQT_TOOLCHAIN%
diff --git a/Sming/Arch/Esp8266/Tools/install.sh b/Sming/Arch/Esp8266/Tools/install.sh
index 29c1cb3fce..02ab45a130 100755
--- a/Sming/Arch/Esp8266/Tools/install.sh
+++ b/Sming/Arch/Esp8266/Tools/install.sh
@@ -2,13 +2,13 @@
 #
 # Esp8266 install.sh
 
-EQT_REPO=https://github.com/earlephilhower/esp-quick-toolchain/releases/download/3.0.0-newlib4.0.0-gnu20
+EQT_REPO="https://github.com/earlephilhower/esp-quick-toolchain/releases/download/3.2.0-gcc10.3"
+EQT_TOOLCHAIN="$(uname -m)-linux-gnu.xtensa-lx106-elf-c791b74.230224.tar.gz"
 
 if [ -d "$ESP_HOME" ]; then
     printf "\n\n** Skipping Esp8266 tools installation: '$ESP_HOME' exists\n\n"
 else
-    TOOLCHAIN="$(uname -m)-linux-gnu.xtensa-lx106-elf-e6a192b.201211.tar.gz"
-    $WGET "$EQT_REPO/$TOOLCHAIN" -O "$DOWNLOADS/$TOOLCHAIN"
+    $WGET "$EQT_REPO/$EQT_TOOLCHAIN" -O "$DOWNLOADS/$EQT_TOOLCHAIN"
     mkdir -p "$ESP_HOME"
-    tar -zxf "$DOWNLOADS/$TOOLCHAIN" -C "$ESP_HOME" --totals
+    tar -zxf "$DOWNLOADS/$EQT_TOOLCHAIN" -C "$ESP_HOME" --totals
 fi
diff --git a/Sming/Arch/Rp2040/Components/libc/component.mk b/Sming/Arch/Rp2040/Components/libc/component.mk
index e316951715..8b3d1e35dc 100644
--- a/Sming/Arch/Rp2040/Components/libc/component.mk
+++ b/Sming/Arch/Rp2040/Components/libc/component.mk
@@ -8,4 +8,14 @@ LIBC_DEFSYMS := \
 	__wrap_vprintf=m_vprintf \
 	__wrap_printf=m_printf
 
-EXTRA_LDFLAGS := $(call DefSym,$(LIBC_DEFSYMS))
+LIBC_UNDEFSYMS := \
+	_close_r \
+	_lseek_r \
+	_read_r \
+	_write_r \
+	_isatty_r
+
+
+EXTRA_LDFLAGS := \
+	$(call DefSym,$(LIBC_DEFSYMS)) \
+	$(call Undef,$(LIBC_UNDEFSYMS))
diff --git a/Sming/Arch/Rp2040/Components/libc/src/libc_replacements.c b/Sming/Arch/Rp2040/Components/libc/src/libc_replacements.c
new file mode 100644
index 0000000000..8f33842417
--- /dev/null
+++ b/Sming/Arch/Rp2040/Components/libc/src/libc_replacements.c
@@ -0,0 +1,86 @@
+/*
+ libc_replacements.c - replaces libc functions with functions
+ from Espressif SDK
+
+ Copyright (c) 2015 Ivan Grokhotkov. All rights reserved.
+ This file is part of the esp8266 core for Arduino environment.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+ Modified 03 April 2015 by Markus Sattler
+
+ */
+
+#include <stdio.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <sys/reent.h>
+#include <esp_attr.h>
+#include <m_printf.h>
+
+int _open_r(struct _reent* unused, const char* ptr, int mode)
+{
+	(void)unused;
+	(void)ptr;
+	(void)mode;
+	return 0;
+}
+
+int _close_r(struct _reent* unused, int file)
+{
+	(void)unused;
+	(void)file;
+	return 0;
+}
+
+int _fstat_r(struct _reent* unused, int file, struct stat* st)
+{
+	(void)unused;
+	(void)file;
+	st->st_mode = S_IFCHR;
+	return 0;
+}
+
+int _lseek_r(struct _reent* unused, int file, int ptr, int dir)
+{
+	(void)unused;
+	(void)file;
+	(void)ptr;
+	(void)dir;
+	return 0;
+}
+
+int _read_r(struct _reent* unused, int file, char* ptr, int len)
+{
+	(void)unused;
+	(void)file;
+	(void)ptr;
+	(void)len;
+	return 0;
+}
+
+int _write_r(struct _reent* r, int file, char* ptr, int len)
+{
+	(void)r;
+	if(file == STDOUT_FILENO) {
+		return m_nputs(ptr, len);
+	}
+	return 0;
+}
+
+int _isatty_r(struct _reent* r, int fd)
+{
+	return 0;
+}
diff --git a/Sming/Arch/Rp2040/README.rst b/Sming/Arch/Rp2040/README.rst
index e5eab5f052..7678906bd7 100644
--- a/Sming/Arch/Rp2040/README.rst
+++ b/Sming/Arch/Rp2040/README.rst
@@ -85,21 +85,30 @@ The following instructions should help.
 
 Compiler/linker
    The RP2040 contains two ARM Cortex-M0+ cores. Tools for all platforms can be downloaded from the
-   `ARM developer website <https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-rm/downloads>`__.
+   `ARM developer website <https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads>`__.
 
    Unzip the archive to a suitable location (e.g. ``/opt/rp2040`` or ``c:\tools\rp2040``) and set :envvar:`PICO_TOOLCHAIN_PATH` accordingly.
 
    .. note::
 
-      At time of writing the Ubuntu repositories contain an older version of this toolchain.
-      It also does not contain GDB, but can be installed separately:
+      The Sming installer script can do this for you ``Tools/install.sh rp2040``
 
+   You can alternatively use the toolchains provided in your GNU/Linux distribution.
+
+   Ubuntu
+      ::
          sudo apt install gcc-arm-none-eabi gdb-multiarch
 
-      To use gdb-multiarch you'll need to do this:
+      To use gdb-multiarch you'll need to do this::
 
          make gdb GDB=gdb-multiarch
 
+   Fedora
+      ::
+         sudo dnf install arm-none-eabi-gcc-cs-c++ arm-none-eabi-newlib
+
+      The standard GDB appears to work OK.
+
 Ninja
    This is used to build the RP2040 SDK code:
 
diff --git a/Sming/Arch/Rp2040/Tools/install.cmd b/Sming/Arch/Rp2040/Tools/install.cmd
index 7fd04c4f7e..cf77680df7 100644
--- a/Sming/Arch/Rp2040/Tools/install.cmd
+++ b/Sming/Arch/Rp2040/Tools/install.cmd
@@ -1,11 +1,11 @@
 REM Rp2040 install.cmd
 
 if exist "%PICO_TOOLCHAIN_PATH%/arm-none-eabi" goto :already_got
-set TOOLCHAIN_VERSION=10.3-2021.07
-set TOOLCHAIN_BASE_URL=https://developer.arm.com/-/media/Files/downloads/gnu-rm
-set TOOLCHAIN_NAME=gcc-arm-none-eabi-%TOOLCHAIN_VERSION%
-set TOOLCHAIN_FILE=%TOOLCHAIN_NAME%-win32.zip
-curl -Lo tmp.zip %TOOLCHAIN_BASE_URL%/%TOOLCHAIN_VERSION%/%TOOLCHAIN_FILE% || goto :EOF
+set TOOLCHAIN_VERSION=13.2.rel1
+set TOOLCHAIN_BASE_URL=https://developer.arm.com/-/media/Files/downloads/gnu
+set TOOLCHAIN_NAME=arm-gnu-toolchain-%TOOLCHAIN_VERSION%-mingw-w64-i686-arm-none-eabi
+set TOOLCHAIN_FILE=%TOOLCHAIN_NAME%.zip
+curl -Lo tmp.zip %TOOLCHAIN_BASE_URL%/%TOOLCHAIN_VERSION%/binrel/%TOOLCHAIN_FILE% || goto :EOF
 7z -o"%PICO_TOOLCHAIN_PATH%-tmp" x tmp.zip || goto :EOF
 del tmp.zip
 move "%PICO_TOOLCHAIN_PATH%-tmp/%TOOLCHAIN_NAME%" "%PICO_TOOLCHAIN_PATH%"
diff --git a/Sming/Arch/Rp2040/Tools/install.sh b/Sming/Arch/Rp2040/Tools/install.sh
index 03451153e5..00cc633dab 100755
--- a/Sming/Arch/Rp2040/Tools/install.sh
+++ b/Sming/Arch/Rp2040/Tools/install.sh
@@ -6,14 +6,13 @@ $PKG_INSTALL ninja-build
 
 if [ -d "$PICO_TOOLCHAIN_PATH/arm-none-eabi" ]; then
     printf "\n\n** Skipping Rp2040 tools installation: '$PICO_TOOLCHAIN_PATH' exists\n\n"
-else
-    TOOLCHAIN_VERSION="10.3-2021.10"
-    TOOLCHAIN_BASE_URL="https://developer.arm.com/-/media/Files/downloads/gnu-rm"
-    TOOLCHAIN_NAME="gcc-arm-none-eabi-$TOOLCHAIN_VERSION"
-    TOOLCHAIN_FILE="$TOOLCHAIN_NAME-$(uname -m)-linux.tar.bz2"
-    TOOLCHAIN_URL="$TOOLCHAIN_BASE_URL/$TOOLCHAIN_VERSION/$TOOLCHAIN_FILE"
+elif [ -n "$PICO_TOOLCHAIN_PATH" ]; then
+    TOOLCHAIN_VERSION="13.2.rel1"
+    TOOLCHAIN_BASE_URL="https://developer.arm.com/-/media/Files/downloads/gnu"
+    TOOLCHAIN_FILE="arm-gnu-toolchain-$TOOLCHAIN_VERSION-$(uname -m)-arm-none-eabi.tar.xz"
+    TOOLCHAIN_URL="$TOOLCHAIN_BASE_URL/$TOOLCHAIN_VERSION/binrel/$TOOLCHAIN_FILE"
     $WGET "$TOOLCHAIN_URL" -O "$DOWNLOADS/$TOOLCHAIN_FILE"
     mkdir -p "$PICO_TOOLCHAIN_PATH"
-    tar -jxf "$DOWNLOADS/$TOOLCHAIN_FILE" -C "$PICO_TOOLCHAIN_PATH" --totals --transform='s|^/*||'
-    mv "$PICO_TOOLCHAIN_PATH/$TOOLCHAIN_NAME/"* "$PICO_TOOLCHAIN_PATH"
+    tar -xf "$DOWNLOADS/$TOOLCHAIN_FILE" -C "$PICO_TOOLCHAIN_PATH" --totals --transform='s|^/*||'
+    mv "$PICO_TOOLCHAIN_PATH/"*/* "$PICO_TOOLCHAIN_PATH"
 fi
diff --git a/Sming/Arch/Rp2040/app.mk b/Sming/Arch/Rp2040/app.mk
index c8c0c32f0f..f96bc1d8f0 100644
--- a/Sming/Arch/Rp2040/app.mk
+++ b/Sming/Arch/Rp2040/app.mk
@@ -6,6 +6,7 @@
 
 # linker flags used to generate the main object file
 LDFLAGS	+= \
+	-Wl,--no-warn-rwx-segments \
 	-Wl,--build-id=none \
 	--specs=nosys.specs \
 	-mcpu=cortex-m0plus \
diff --git a/Sming/Arch/Rp2040/build.mk b/Sming/Arch/Rp2040/build.mk
index 77cb67856f..810d3d9057 100644
--- a/Sming/Arch/Rp2040/build.mk
+++ b/Sming/Arch/Rp2040/build.mk
@@ -26,11 +26,10 @@ ifeq (,$(wildcard $(PICO_TOOLCHAIN_PATH)/$(CONFIG_TOOLPREFIX)))
 $(error PICO_TOOLCHAIN_PATH not set correctly: $(PICO_TOOLCHAIN_PATH))
 endif
 else
-PICO_TOOLCHAIN_PATH := $(shell which $(CONFIG_TOOLPREFIX)-gcc)
-ifeq (,$(PICO_TOOLCHAIN_PATH))
+ifeq (,$(shell which $(CONFIG_TOOLPREFIX)-gcc))
 $(error Toolchain not found, maybe set PICO_TOOLCHAIN_PATH)
 endif
-TOOLSPEC := $(dir $(PICO_TOOLCHAIN_PATH))$(CONFIG_TOOLPREFIX)-
+TOOLSPEC := $(CONFIG_TOOLPREFIX)-
 endif
 
 # select which tools to use as assembler, compiler, librarian and linker
@@ -42,7 +41,7 @@ LD				:= $(TOOLSPEC)gcc
 NM				:= $(TOOLSPEC)nm
 OBJCOPY		 	:= $(TOOLSPEC)objcopy
 OBJDUMP		 	:= $(TOOLSPEC)objdump
-GDB				:= $(TOOLSPEC)gdb
+GDB				:= gdb
 
 CPPFLAGS += \
 	-nostdlib
diff --git a/docs/source/upgrading/5.1-5.2.rst b/docs/source/upgrading/5.1-5.2.rst
index e06142934a..9d3303d4e1 100644
--- a/docs/source/upgrading/5.1-5.2.rst
+++ b/docs/source/upgrading/5.1-5.2.rst
@@ -41,3 +41,16 @@ Espressif toolchains use forks:
 
 esp8266: https://github.com/earlephilhower/newlib-xtensa/blob/xtensa-4_0_0-lock-arduino/newlib/libc/
 esp32: https://github.com/espressif/newlib-esp32/blob/esp-4.3.0/newlib/libc/
+
+
+**Toolchain versions updated**
+
+Esp8266
+    The installer has been updated to use the latest toolchain (Feb 23), gcc 10.3.
+
+Esp32 IDF
+    The installation scripts now install IDF version 5.2 by default.
+    See :ref:`idf_versions` for further details.
+
+RP2040
+    The installer has been updated to use the latest toolchain (Oct 23), gcc 13.2.