diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 5fbd524ce..15361a6a2 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,9 +10,9 @@ jobs:
       matrix:
         lua_ver: ['5.1', '5.3']
         numbers: ['default', 'alternate']
-        target: ['esp32', 'esp32s2', 'esp32s3', 'esp32c3', 'esp32c6', 'esp32h2']
+        target: ['esp32', 'esp32s2', 'esp32s3', 'esp32c3', 'esp32c5', 'esp32c6', 'esp32h2']
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
 
     steps:
       - uses: actions/checkout@v4
@@ -31,7 +31,10 @@ jobs:
         shell: bash
       - name: Prepare default sdkconfig
         run: |
+          # Compose sdkconfig manually rather than overwrite checked in files
           cp sdkconfig.defaults sdkconfig
+          [ -e "sdkconfig.defaults.${{ matrix.target }}" ] && cat "sdkconfig.defaults.${{ matrix.target }}" >> sdkconfig || true
+          [ -e "sdkconfig.ci.${{ matrix.target }}" ] && cat "sdkconfig.ci.${{ matrix.target }}" >> sdkconfig || true
         shell: bash
       - name: Update config for Lua 5.1
         if: ${{ matrix.lua_ver == '5.1' }}
@@ -54,6 +57,10 @@ jobs:
           echo CONFIG_LUA_NUMBER_INT64=y >> sdkconfig
           echo CONFIG_LUA_NUMBER_DOUBLE=y >> sdkconfig
         shell: bash
+      - name: Show resulting sdkconfig
+        shell: bash
+        run: |
+          cat sdkconfig
       - name: Build firmware
         run: |
           make IDF_TARGET=${{ matrix.target }}
diff --git a/.gitignore b/.gitignore
index c0cc7b1e0..eb12f527a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,5 @@
 sdk/
 cache/
-user_config.h
 server-ca.crt
 sdkconfig
 sdkconfig.old*
@@ -13,6 +12,7 @@ bin
 version.txt
 managed_components/
 dependencies.lock
+.idf_tools_installed
 
 #ignore Eclipse project files
 .cproject
diff --git a/components/base_nodemcu/CMakeLists.txt b/components/base_nodemcu/CMakeLists.txt
index fdb2c3808..e589ccb84 100644
--- a/components/base_nodemcu/CMakeLists.txt
+++ b/components/base_nodemcu/CMakeLists.txt
@@ -2,6 +2,6 @@ idf_component_register(
   SRCS "ip_fmt.c" "user_main.c"
   INCLUDE_DIRS "include"
   REQUIRES "lua"
-  PRIV_REQUIRES "nvs_flash" "spiffs" "esp_netif" "driver" "vfs"
+  PRIV_REQUIRES "driver" "esp_netif" "esp_vfs_console" "nvs_flash" "vfs" "spiffs"
   LDFRAGMENTS "nodemcu.lf"
 )
diff --git a/components/base_nodemcu/user_main.c b/components/base_nodemcu/user_main.c
index 64bdea5b6..8d3354938 100644
--- a/components/base_nodemcu/user_main.c
+++ b/components/base_nodemcu/user_main.c
@@ -14,8 +14,12 @@
 #include "sdkconfig.h"
 #include "esp_system.h"
 #include "esp_event.h"
-#include "esp_spiffs.h"
 #include "esp_netif.h"
+#include "esp_vfs_dev.h"
+#include "esp_vfs_cdcacm.h"
+#include "esp_vfs_usb_serial_jtag.h"
+#include "driver/uart_vfs.h"
+#include "driver/usb_serial_jtag.h"
 #include "nvs_flash.h"
 
 #include "task/task.h"
@@ -24,6 +28,10 @@
 #include "freertos/FreeRTOS.h"
 #include "freertos/semphr.h"
 
+#ifndef CONFIG_NODEMCU_AUTO_FORMAT_ON_BOOT
+# define CONFIG_NODEMCU_AUTO_FORMAT_ON_BOOT 0
+#endif
+
 
 // We don't get argument size data from the esp_event dispatch, so it's
 // not possible to copy and forward events from the default event queue
@@ -94,7 +102,6 @@ static void start_lua ()
 
 static void nodemcu_init(void)
 {
-    NODE_ERR("\n");
     // Initialize platform first for lua modules.
     if( platform_init() != PLATFORM_OK )
     {
@@ -102,34 +109,8 @@ static void nodemcu_init(void)
         NODE_DBG("Can not init platform for modules.\n");
         return;
     }
-    const char *label = CONFIG_NODEMCU_DEFAULT_SPIFFS_LABEL;
-
-    esp_vfs_spiffs_conf_t spiffs_cfg = {
-      .base_path = "",
-      .partition_label = (label && label[0]) ? label : NULL,
-      .max_files = CONFIG_NODEMCU_MAX_OPEN_FILES,
-      .format_if_mount_failed = true,
-    };
-    const char *reason = NULL;
-    switch(esp_vfs_spiffs_register(&spiffs_cfg))
-    {
-      case ESP_OK: break;
-      case ESP_ERR_NO_MEM:
-        reason = "out of memory";
-        break;
-      case ESP_ERR_INVALID_STATE:
-        reason = "already mounted, or encrypted";
-        break;
-      case ESP_ERR_NOT_FOUND:
-        reason = "no SPIFFS partition found";
-        break;
-      case ESP_FAIL:
-        reason = "failed to mount or format partition";
-        break;
-      default:
-        reason = "unknown";
-        break;
-    }
+    const char *reason =
+      platform_remount_default_fs(CONFIG_NODEMCU_AUTO_FORMAT_ON_BOOT);
     if (reason)
       printf("Failed to mount SPIFFS partition: %s\n", reason);
 }
diff --git a/components/modules/CMakeLists.txt b/components/modules/CMakeLists.txt
index 0fab0691b..85e897399 100644
--- a/components/modules/CMakeLists.txt
+++ b/components/modules/CMakeLists.txt
@@ -1,4 +1,6 @@
 # Modules common to all chips
+set(extra_requires
+)
 set(wifi_modules
   "espnow.c"
   "wifi.c"
@@ -64,6 +66,9 @@ if(IDF_TARGET STREQUAL "esp32")
     "touch.c"
     ${wifi_modules}
   )
+  list(APPEND extra_requires
+     "driver_can"
+  )
 elseif(IDF_TARGET STREQUAL "esp32s2")
   list(APPEND module_srcs
     "dac.c"
@@ -81,6 +86,12 @@ elseif(IDF_TARGET STREQUAL "esp32c3")
   list(APPEND module_srcs
     ${wifi_modules}
   )
+elseif(IDF_TARGET STREQUAL "esp32c5")
+  list(APPEND module_srcs
+    "i2s.c"
+    "pulsecnt.c"
+    ${wifi_modules}
+  )
 elseif(IDF_TARGET STREQUAL "esp32c6")
   list(APPEND module_srcs
     "dac.c"
@@ -99,11 +110,11 @@ idf_component_register(
     "app_update"
     "base_nodemcu"
     "bt"
-    "driver_can"
     "esp_eth"
     "esp_http_client"
     "esp_http_server"
     "esp_hw_support"
+    "esp_vfs_console"
     "fatfs"
     "libsodium"
     "lua"
@@ -118,6 +129,7 @@ idf_component_register(
     "u8g2"
     "ucg"
     "vfs"
+    ${extra_requires}
 )
 
 # Match up all the module source files with their corresponding Kconfig
diff --git a/components/modules/Kconfig b/components/modules/Kconfig
index c393ab6b9..9da027eee 100644
--- a/components/modules/Kconfig
+++ b/components/modules/Kconfig
@@ -329,6 +329,18 @@ menu "NodeMCU modules"
         help
             Includes the WiFi module (recommended).
 
+    config NODEMCU_CMODULE_WIFI_STARTUP_DELAY
+        depends on NODEMCU_CMODULE_WIFI
+        depends on ESP_CONSOLE_USB_CDC
+        int "WiFi start-up delay (ms)"
+        default 500
+        help
+            For some unknown reason there is an issue with allowing the
+            WiFi stack to initialise immediately when using a USB CDC
+            console (at least on the ESP32-S2). The workaround is to
+            delay the initialisation sequence by enough that whatever
+            else is needing to run gets to run first.
+
     config NODEMCU_CMODULE_WS2812
         bool "WS2812 module"
         default "n"
diff --git a/components/modules/console.c b/components/modules/console.c
index e115c9582..c95d692b8 100644
--- a/components/modules/console.c
+++ b/components/modules/console.c
@@ -8,7 +8,9 @@
 #include "esp_vfs_dev.h"
 #include "esp_vfs_cdcacm.h"
 #include "esp_vfs_usb_serial_jtag.h"
+#include "driver/uart_vfs.h"
 #include "driver/usb_serial_jtag.h"
+#include "driver/usb_serial_jtag_vfs.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 
@@ -111,9 +113,9 @@ static void console_init(void)
 #if CONFIG_ESP_CONSOLE_UART_DEFAULT || CONFIG_ESP_CONSOLE_UART_CUSTOM
   /* Based on console/advanced example */
 
-  esp_vfs_dev_uart_port_set_rx_line_endings(
+  uart_vfs_dev_port_set_rx_line_endings(
     CONFIG_ESP_CONSOLE_UART_NUM, RX_LINE_ENDINGS_CFG);
-  esp_vfs_dev_uart_port_set_tx_line_endings(
+  uart_vfs_dev_port_set_tx_line_endings(
     CONFIG_ESP_CONSOLE_UART_NUM, TX_LINE_ENDINGS_CFG);
 
   /* Configure UART. Note that REF_TICK is used so that the baud rate remains
@@ -135,20 +137,20 @@ static void console_init(void)
   uart_param_config(CONFIG_ESP_CONSOLE_UART_NUM, &uart_config);
 
   /* Tell VFS to use UART driver */
-  esp_vfs_dev_uart_use_driver(CONFIG_ESP_CONSOLE_UART_NUM);
+  uart_vfs_dev_use_driver(CONFIG_ESP_CONSOLE_UART_NUM);
 
 #elif CONFIG_ESP_CONSOLE_USB_SERIAL_JTAG
   /* Based on @pjsg's work */
 
-  esp_vfs_dev_usb_serial_jtag_set_rx_line_endings(RX_LINE_ENDINGS_CFG);
-  esp_vfs_dev_usb_serial_jtag_set_tx_line_endings(TX_LINE_ENDINGS_CFG);
+  usb_serial_jtag_vfs_set_rx_line_endings(RX_LINE_ENDINGS_CFG);
+  usb_serial_jtag_vfs_set_tx_line_endings(TX_LINE_ENDINGS_CFG);
 
   usb_serial_jtag_driver_config_t usb_serial_jtag_config =
     USB_SERIAL_JTAG_DRIVER_CONFIG_DEFAULT();
   /* Install USB-SERIAL-JTAG driver for interrupt-driven reads and write */
   usb_serial_jtag_driver_install(&usb_serial_jtag_config);
 
-  esp_vfs_usb_serial_jtag_use_driver();
+  usb_serial_jtag_vfs_use_driver();
 #elif CONFIG_ESP_CONSOLE_USB_CDC
   /* Based on console/advanced_usb_cdc */
 
diff --git a/components/modules/eth.c b/components/modules/eth.c
index 253935b1b..7ab7d8ffa 100644
--- a/components/modules/eth.c
+++ b/components/modules/eth.c
@@ -274,9 +274,9 @@ static int leth_init( lua_State *L )
 
   eth_esp32_emac_config_t emac_cfg = ETH_ESP32_EMAC_DEFAULT_CONFIG();
 
-  emac_cfg.smi_mdc_gpio_num =
+  emac_cfg.smi_gpio.mdc_num =
     opt_checkint_range( L, "mdc",   -1, GPIO_NUM_0, GPIO_NUM_MAX-1 );
-  emac_cfg.smi_mdio_gpio_num =
+  emac_cfg.smi_gpio.mdio_num =
     opt_checkint_range( L, "mdio",  -1, GPIO_NUM_0, GPIO_NUM_MAX-1 );
 
   eth_mac_config_t mac_cfg = ETH_MAC_DEFAULT_CONFIG();
diff --git a/components/modules/file.c b/components/modules/file.c
index fae1c0bc6..73cf8584b 100644
--- a/components/modules/file.c
+++ b/components/modules/file.c
@@ -31,6 +31,11 @@ static int file_format( lua_State* L )
   else{
     NODE_ERR( "format done.\n" );
   }
+
+  const char *err = platform_remount_default_fs(false);
+  if (err)
+    return luaL_error(L, err);
+
   return 0;
 }
 
diff --git a/components/modules/heaptrace.c b/components/modules/heaptrace.c
index d8f023eef..f4918dd66 100644
--- a/components/modules/heaptrace.c
+++ b/components/modules/heaptrace.c
@@ -16,7 +16,7 @@ static int lht_init(lua_State *L)
 
   heap_trace_stop();
   free(buffer);
-  buffer = calloc(sizeof(heap_trace_record_t), records);
+  buffer = calloc(records, sizeof(heap_trace_record_t));
   if (!buffer)
     return luaL_error(L, "out of memory");
 
diff --git a/components/modules/i2s.c b/components/modules/i2s.c
index cd213c57d..49932f1db 100644
--- a/components/modules/i2s.c
+++ b/components/modules/i2s.c
@@ -161,9 +161,13 @@ static int node_i2s_start( lua_State *L )
   pin_config.data_out_num  = opt_checkint(L, "data_out_pin", I2S_PIN_NO_CHANGE);
   pin_config.data_in_num = opt_checkint(L, "data_in_pin", I2S_PIN_NO_CHANGE);
   //
+#ifdef SOC_I2S_SUPPORTS_DAC
   i2s_dac_mode_t dac_mode = opt_checkint_range(L, "dac_mode", I2S_DAC_CHANNEL_DISABLE, 0, I2S_DAC_CHANNEL_MAX-1);
+#endif
   //
+#ifdef SOC_I2S_SUPPORTS_ADC
   adc1_channel_t adc1_channel = opt_checkint_range(L, "adc1_channel", ADC1_CHANNEL_MAX, ADC1_CHANNEL_0, ADC1_CHANNEL_MAX);
+#endif
 
   // handle optional callback functions TX and RX
   lua_settop( L, top );
@@ -183,14 +187,18 @@ static int node_i2s_start( lua_State *L )
   if (err != ESP_OK)
     luaL_error( L, "i2s can not start" );
 
+#ifdef SOC_I2S_SUPPORTS_DAC
   if (dac_mode != I2S_DAC_CHANNEL_DISABLE) {
     if (i2s_set_dac_mode( dac_mode ) != ESP_OK)
       luaL_error( L, "error setting dac mode" );
   }
+#endif
+#ifdef SOC_I2S_SUPPORTS_ADC
   if (adc1_channel != ADC1_CHANNEL_MAX) {
     if (i2s_set_adc_mode( ADC_UNIT_1, adc1_channel ) != ESP_OK)
       luaL_error( L, "error setting adc1 mode" );
   }
+#endif
 
   if (i2s_set_pin(i2s_id, &pin_config) != ESP_OK)
     luaL_error( L, "error setting pins" );
@@ -331,14 +339,20 @@ LROT_BEGIN(i2s, NULL, 0)
   LROT_NUMENTRY( MODE_SLAVE,        I2S_MODE_SLAVE )
   LROT_NUMENTRY( MODE_TX,           I2S_MODE_TX )
   LROT_NUMENTRY( MODE_RX,           I2S_MODE_RX )
+#ifdef SOC_I2S_SUPPORTS_DAC
   LROT_NUMENTRY( MODE_DAC_BUILT_IN, I2S_MODE_DAC_BUILT_IN )
+#endif
+#ifdef SOC_I2S_SUPPORTS_ADC
   LROT_NUMENTRY( MODE_ADC_BUILT_IN, I2S_MODE_ADC_BUILT_IN )
+#endif
   LROT_NUMENTRY( MODE_PDM,          I2S_MODE_PDM )
 
+#ifdef SOC_I2S_SUPPORTS_DAC
   LROT_NUMENTRY( DAC_CHANNEL_DISABLE, I2S_DAC_CHANNEL_DISABLE )
   LROT_NUMENTRY( DAC_CHANNEL_RIGHT,   I2S_DAC_CHANNEL_RIGHT_EN )
   LROT_NUMENTRY( DAC_CHANNEL_LEFT,    I2S_DAC_CHANNEL_LEFT_EN )
   LROT_NUMENTRY( DAC_CHANNEL_BOTH,    I2S_DAC_CHANNEL_BOTH_EN )
+#endif
 LROT_END(i2s, NULL, 0)
 
 int luaopen_i2s( lua_State *L ) {
diff --git a/components/modules/node.c b/components/modules/node.c
index 9979a3990..247a0531e 100644
--- a/components/modules/node.c
+++ b/components/modules/node.c
@@ -113,16 +113,19 @@ static int node_bootreason( lua_State *L)
 #if defined(CONFIG_IDF_TARGET_ESP32) || defined(CONFIG_IDF_TARGET_ESP32C6)
     case SDIO_RESET:
 #endif
-#if defined(CONFIG_IDF_TARGET_ESP32S2) || defined(CONFIG_IDF_TARGET_ESP32S3) || defined(CONFIG_IDF_TARGET_ESP32C3) || defined(CONFIG_IDF_TARGET_ESP32H2)
+#if defined(CONFIG_IDF_TARGET_ESP32S2) || defined(CONFIG_IDF_TARGET_ESP32S3) || defined(CONFIG_IDF_TARGET_ESP32C3)
     case GLITCH_RTC_RESET:
 #endif
-#if defined(CONFIG_IDF_TARGET_ESP32S2) || defined(CONFIG_IDF_TARGET_ESP32S3) || defined(CONFIG_IDF_TARGET_ESP32C3) || defined(CONFIG_IDF_TARGET_ESP32C6) || defined(CONFIG_IDF_TARGET_ESP32H2)
+#if defined(CONFIG_IDF_TARGET_ESP32S2) || defined(CONFIG_IDF_TARGET_ESP32S3) || defined(CONFIG_IDF_TARGET_ESP32C3) || defined(CONFIG_IDF_TARGET_ESP32C6) || defined(CONFIG_IDF_TARGET_ESP32H2) || defined(CONFIG_IDF_TARGET_ESP32C5)
     case EFUSE_RESET:
 #endif
-#if defined(CONFIG_IDF_TARGET_ESP32C6)
+#if defined(CONFIG_IDF_TARGET_ESP32C6) || defined(CONFIG_IDF_TARGET_ESP32C5)
     case JTAG_RESET:
 #endif
-#if defined(CONFIG_IDF_TARGET_ESP32S3) || defined(CONFIG_IDF_TARGET_ESP32C3) || defined(CONFIG_IDF_TARGET_ESP32C6) || defined(CONFIG_IDF_TARGET_ESP32H2)
+#if defined(CONFIG_IDF_TARGET_ESP32H2)
+    case JTAG_CPU_RESET:
+#endif
+#if defined(CONFIG_IDF_TARGET_ESP32S3) || defined(CONFIG_IDF_TARGET_ESP32C3) || defined(CONFIG_IDF_TARGET_ESP32C6) || defined(CONFIG_IDF_TARGET_ESP32H2) || defined(CONFIG_IDF_TARGET_ESP32C5)
     case USB_UART_CHIP_RESET:
     case USB_JTAG_CHIP_RESET:
 #endif
@@ -131,7 +134,7 @@ static int node_bootreason( lua_State *L)
 #endif
     case TG0WDT_SYS_RESET:
     case TG1WDT_SYS_RESET:
-#if !defined(CONFIG_IDF_TARGET_ESP32C6)
+#if !defined(CONFIG_IDF_TARGET_ESP32C6) && !defined(CONFIG_IDF_TARGET_ESP32C5) && !defined(CONFIG_IDF_TARGET_ESP32H2)
     case INTRUSION_RESET:
 #endif
     case RTCWDT_BROWN_OUT_RESET:
@@ -281,7 +284,7 @@ static int node_sleep (lua_State *L)
     esp_sleep_enable_timer_wakeup(usecs);
   }
 
-#if !defined(CONFIG_IDF_TARGET_ESP32C3) && !defined(CONFIG_IDF_TARGET_ESP32C6) && !defined(CONFIG_IDF_TARGET_ESP32H2)
+#if !defined(CONFIG_IDF_TARGET_ESP32C3) && !defined(CONFIG_IDF_TARGET_ESP32C6) && !defined(CONFIG_IDF_TARGET_ESP32H2) && !defined(CONFIG_IDF_TARGET_ESP32C5)
   // touch option: boolean
   if (opt_checkbool(L, "touch", false)) {
     int err = esp_sleep_enable_touchpad_wakeup();
@@ -354,7 +357,7 @@ static int node_dsleep (lua_State *L)
       }
     }
 
-#if !defined(CONFIG_IDF_TARGET_ESP32C3) && !defined(CONFIG_IDF_TARGET_ESP32C6) && !defined(CONFIG_IDF_TARGET_ESP32H2)
+#if !defined(CONFIG_IDF_TARGET_ESP32C3) && !defined(CONFIG_IDF_TARGET_ESP32C6) && !defined(CONFIG_IDF_TARGET_ESP32H2) && !defined(CONFIG_IDF_TARGET_ESP32C5)
     bool pull = opt_checkbool(L, "pull", false);
     if (opt_get(L, "isolate", LUA_TTABLE)) {
       for (int i = 1; ; i++) {
diff --git a/components/modules/wifi.c b/components/modules/wifi.c
index f16b98331..81b86a0e8 100644
--- a/components/modules/wifi.c
+++ b/components/modules/wifi.c
@@ -93,22 +93,6 @@ static int wifi_stop (lua_State *L)
     0 : luaL_error (L, "failed to stop wifi, code %d", err);
 }
 
-#if defined(CONFIG_ESP_CONSOLE_USB_CDC)
-// For some unknown reason, on an S2 with USB CDC console enabled, if we allow
-// the esp_wifi_init() to run during initial startup, something Bad(tm)
-// happens and the S2 fails to enumerate on the USB bus. However, if we defer
-// the wifi initialisation, it starts up fine. This is an ugly workaround, but
-// I'm out of ideas at this point. If I use a UART console, I see no errors
-// even with the immediate init.
-static task_handle_t th;
-#endif
-
-static void do_esp_wifi_init(task_param_t p, task_prio_t)
-{
-  wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
-  ESP_ERROR_CHECK(esp_wifi_init (&cfg));
-}
-
 extern void wifi_ap_init (void);
 extern void wifi_sta_init (void);
 static int wifi_init (lua_State *L)
@@ -117,11 +101,16 @@ static int wifi_init (lua_State *L)
   wifi_sta_init ();
 
 #if defined(CONFIG_ESP_CONSOLE_USB_CDC)
-  th = task_get_id(do_esp_wifi_init);
-  task_post_low(th, 0);
-#else
-  do_esp_wifi_init(0, 0);
+// For some unknown reason, on an S2 with USB CDC console enabled, if we allow
+// the esp_wifi_init() to run during initial startup, something Bad(tm)
+// happens and the S2 fails to enumerate on the USB bus. However, if we defer
+// it by half a second or so, everything works. This is an ugly workaround,
+// but I'm out of ideas at this point.
+  vTaskDelay(CONFIG_NODEMCU_CMODULE_WIFI_STARTUP_DELAY / portTICK_PERIOD_MS);
 #endif
+  wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
+  ESP_ERROR_CHECK(esp_wifi_init (&cfg));
+
   return 0;
 }
 
diff --git a/components/platform/CMakeLists.txt b/components/platform/CMakeLists.txt
index 955f8dbb4..3166c3296 100644
--- a/components/platform/CMakeLists.txt
+++ b/components/platform/CMakeLists.txt
@@ -24,4 +24,5 @@ idf_component_register(
     "esp_rom"
     "lua"
     "soc"
+    "spiffs"
 )
diff --git a/components/platform/Kconfig b/components/platform/Kconfig
index a2b21f7ab..fbf5ff8c7 100644
--- a/components/platform/Kconfig
+++ b/components/platform/Kconfig
@@ -37,6 +37,18 @@ menu "NodeMCU platform config"
             opened. Raising this limit will incur some extra memory
             overhead.
 
+    config NODEMCU_AUTO_FORMAT_ON_BOOT
+        bool "Auto-format SPIFFS on first boot"
+        default "y" if !ESP_CONSOLE_USB_CDC
+        default "n" if  ESP_CONSOLE_USB_CDC
+        help
+            The traditional behavior of NodeMCU is to automatically format
+            the SPIFFS partition on first boot (or any other time the
+            filesystem is unmountable). When using USB CDC however, the
+            formatting can interfere with USB device enumeration, leading
+            to a failed boot. In that case, disable the auto-format and
+            use file.format() after startup instead.
+
     config NODEMCU_EMBED_LFS
         bool "Embed LFS as part of the NodeMCU firmware"
         default "n"
@@ -72,6 +84,7 @@ menu "NodeMCU platform config"
             default y if IDF_TARGET_ESP32S2
             default y if IDF_TARGET_ESP32S3
             default y if IDF_TARGET_ESP32C3
+            default y if IDF_TARGET_ESP32C5
             default y if IDF_TARGET_ESP32C6
             default y if IDF_TARGET_ESP32H2
 
@@ -79,6 +92,8 @@ menu "NodeMCU platform config"
             bool
             default y if IDF_TARGET_ESP32
             default y if IDF_TARGET_ESP32S3
+            default y if IDF_TARGET_ESP32C5
+            default y if IDF_TARGET_ESP32C6
 
         config NODEMCU_UART_DRIVER_BUF_SIZE_RX0
             int "RX buffer size for UART0"
diff --git a/components/platform/include/platform.h b/components/platform/include/platform.h
index 42ec933a6..f3e4e2dd8 100644
--- a/components/platform/include/platform.h
+++ b/components/platform/include/platform.h
@@ -272,4 +272,10 @@ bool platform_partition_info (uint8_t idx, platform_partition_t *info);
 
 void platform_print_deprecation_note( const char *msg, const char *time_frame);
 
+/**
+ * Mount or remount the default SPIFFS filesystem.
+ * @returns An error message string if the operation failed.
+ */
+const char *platform_remount_default_fs(bool autoformat);
+
 #endif
diff --git a/components/platform/onewire.c b/components/platform/onewire.c
index 36877b104..3745bdf42 100644
--- a/components/platform/onewire.c
+++ b/components/platform/onewire.c
@@ -65,6 +65,7 @@ sample code bearing this copyright.
 #include "driver/gpio.h"
 #include "rom/gpio.h" // for gpio_matrix_out()
 #include "soc/gpio_periph.h"
+#include "hal/gpio_ll.h"
 #include "esp_log.h"
 
 #define TRUE (1==1)
@@ -197,7 +198,7 @@ static int onewire_rmt_attach_pin( uint8_t gpio_num )
     return PLATFORM_ERR;
 
   if (gpio_num != ow_rmt.gpio) {
-#if !defined(CONFIG_IDF_TARGET_ESP32C3) && !defined(CONFIG_IDF_TARGET_ESP32C6) && !defined(CONFIG_IDF_TARGET_ESP32H2)
+#if !defined(CONFIG_IDF_TARGET_ESP32C3) && !defined(CONFIG_IDF_TARGET_ESP32C6) && !defined(CONFIG_IDF_TARGET_ESP32H2) && !defined(CONFIG_IDF_TARGET_ESP32C5)
     // attach GPIO to previous pin
     if (gpio_num < 32) {
       GPIO.enable_w1ts = (0x1 << gpio_num);
@@ -217,7 +218,7 @@ static int onewire_rmt_attach_pin( uint8_t gpio_num )
     rmt_set_gpio( ow_rmt.rx, RMT_MODE_RX, gpio_num, false );
     rmt_set_gpio( ow_rmt.tx, RMT_MODE_TX, gpio_num, false );
     // force pin direction to input to enable path to RX channel
-    PIN_INPUT_ENABLE(GPIO_PIN_MUX_REG[gpio_num]);
+    gpio_ll_input_enable(&GPIO, gpio_num);
 
     ow_rmt.gpio = gpio_num;
   }
diff --git a/components/platform/platform.c b/components/platform/platform.c
index f5860bbde..a31840869 100644
--- a/components/platform/platform.c
+++ b/components/platform/platform.c
@@ -11,6 +11,7 @@
 #include "lua.h"
 #include "rom/uart.h"
 #include "esp_log.h"
+#include "esp_spiffs.h"
 #include "task/task.h"
 #include "linput.h"
 
@@ -211,7 +212,7 @@ uint32_t platform_uart_setup( unsigned id, uint32_t baud, int databits, int pari
   uart_config_t cfg = {
      .baud_rate = baud,
      .flow_ctrl = flow_control,
-     .rx_flow_ctrl_thresh = UART_FIFO_LEN - 16,
+     .rx_flow_ctrl_thresh = UART_HW_FIFO_LEN(id) - 16,
      .source_clk = UART_SCLK_DEFAULT,
   };
   
@@ -672,3 +673,38 @@ void platform_print_deprecation_note( const char *msg, const char *time_frame)
   printf( "Warning, deprecated API! %s. It will be removed %s. See documentation for details.\n", msg, time_frame );
 }
 
+
+const char *platform_remount_default_fs(bool autoformat)
+{
+  const char *label = CONFIG_NODEMCU_DEFAULT_SPIFFS_LABEL;
+
+  if (esp_spiffs_mounted(label))
+    esp_vfs_spiffs_unregister(label);
+
+  esp_vfs_spiffs_conf_t spiffs_cfg = {
+    .base_path = "",
+    .partition_label = (label && label[0]) ? label : NULL,
+    .max_files = CONFIG_NODEMCU_MAX_OPEN_FILES,
+    .format_if_mount_failed = autoformat,
+  };
+  const char *reason = NULL;
+  switch(esp_vfs_spiffs_register(&spiffs_cfg))
+  {
+    case ESP_OK:
+    case ESP_ERR_INVALID_STATE: // already mounted (or encrypted)
+      break;
+    case ESP_ERR_NO_MEM:
+      reason = "out of memory";
+      break;
+    case ESP_ERR_NOT_FOUND:
+      reason = "no SPIFFS partition found";
+      break;
+    case ESP_FAIL:
+      reason = "failed to mount partition, use file.format() to reformat";
+      break;
+    default:
+      reason = "unknown";
+      break;
+  }
+  return reason;
+}
diff --git a/docs/modules/node.md b/docs/modules/node.md
index 66772ee71..10cfe05cc 100644
--- a/docs/modules/node.md
+++ b/docs/modules/node.md
@@ -205,7 +205,7 @@ Returns information about hardware, software version and build configuration.
 If a `group` is given the return value will be a table containing the following elements:
 
 - for `group` = `"hw"`
-    - `chip_model` (string) one of "ESP32", "ESP32S2", "ESP32S3", "ESP32C3", "ESP32C2", "ESP32C6", "ESP32H2"
+    - `chip_model` (string) one of "ESP32", "ESP32S2", "ESP32S3", "ESP32C3", "ESP32C2", "ESP32C5", "ESP32C6", "ESP32H2"
     - `chip_features` (number) bit mask of chip feature flags
         - BIT(0), Chip has embedded flash memory
         - BIT(1), Chip has 2.4GHz WiFi
diff --git a/sdk/esp32-esp-idf b/sdk/esp32-esp-idf
index e7771c75b..cb3ac7429 160000
--- a/sdk/esp32-esp-idf
+++ b/sdk/esp32-esp-idf
@@ -1 +1 @@
-Subproject commit e7771c75bd1dbbfb7b3c5381be7e063b197c9734
+Subproject commit cb3ac7429c73b6e7c6d79ae05de480d4b6706770
diff --git a/sdkconfig.ci.esp32c3 b/sdkconfig.ci.esp32c3
new file mode 100644
index 000000000..61f1cf165
--- /dev/null
+++ b/sdkconfig.ci.esp32c3
@@ -0,0 +1,7 @@
+CONFIG_USJ_ENABLE_USB_SERIAL_JTAG=y
+# CONFIG_ESP_CONSOLE_UART_DEFAULT is not set
+CONFIG_ESP_CONSOLE_USB_SERIAL_JTAG=y
+# CONFIG_ESP_CONSOLE_UART_CUSTOM is not set
+# CONFIG_ESP_CONSOLE_NONE is not set
+CONFIG_ESP_CONSOLE_SECONDARY_NONE=y
+CONFIG_ESP_CONSOLE_USB_SERIAL_JTAG_ENABLED=y
diff --git a/sdkconfig.ci.esp32s2 b/sdkconfig.ci.esp32s2
new file mode 100644
index 000000000..9d21ad104
--- /dev/null
+++ b/sdkconfig.ci.esp32s2
@@ -0,0 +1,6 @@
+# CONFIG_ESP_CONSOLE_UART_DEFAULT is not set
+CONFIG_ESP_CONSOLE_USB_CDC=y
+# CONFIG_ESP_CONSOLE_UART_CUSTOM is not set
+# CONFIG_ESP_CONSOLE_NONE is not set
+CONFIG_ESP_CONSOLE_USB_CDC_RX_BUF_SIZE=512
+