esp32: Update to use ESP-IDF v5.5.1.

dpgeorge · dpgeorge · commit 0f49a1d24095 · 2025-10-17T12:33:02.000+11:00
Tested with ESP32_GENERIC, ESP32_GENERIC_C3, ESP32_GENERIC_C6 and
ESP32_GENERIC_S3 firmware, using the full test suite.  There do not seem to
be any regressions.

Signed-off-by: Damien George &lt;damien@micropython.org&gt;
diff --git a/ports/esp32/README.md b/ports/esp32/README.md
@@ -31,8 +31,8 @@ manage the ESP32 microcontroller, as well as a way to manage the required
 build environment and toolchains needed to build the firmware.
 
 The ESP-IDF changes quickly and MicroPython only supports certain versions. The
-current recommended version of ESP-IDF for MicroPython is v5.4.2. MicroPython
-also supports v5.2, v5.2.2, v5.3, v5.4 and v5.4.1.
+current recommended version of ESP-IDF for MicroPython is v5.5.1. MicroPython
+also supports v5.2, v5.2.2, v5.3, v5.4, v5.4.1 and v5.4.2.
 
 To install the ESP-IDF the full instructions can be found at the
 [Espressif Getting Started guide](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/get-started/index.html#installation-step-by-step).
@@ -50,10 +50,10 @@ The steps to take are summarised below.
 To check out a copy of the IDF use git clone:
 
 ```bash
-$ git clone -b v5.4.2 --recursive https://github.com/espressif/esp-idf.git
+$ git clone -b v5.5.1 --recursive https://github.com/espressif/esp-idf.git
 ```
 
-You can replace `v5.4.2` with any other supported version.
+You can replace `v5.5.1` with any other supported version.
 (You don't need a full recursive clone; see the `ci_esp32_setup` function in
 `tools/ci.sh` in this repository for more detailed set-up commands.)
 
@@ -62,7 +62,7 @@ MicroPython and update the submodules using:
 
 ```bash
 $ cd esp-idf
-$ git checkout v5.4.2
+$ git checkout v5.5.1
 $ git submodule update --init --recursive
 ```
 
diff --git a/ports/esp32/boards/sdkconfig.spiram b/ports/esp32/boards/sdkconfig.spiram
@@ -16,3 +16,7 @@ CONFIG_COMPILER_OPTIMIZATION_CHECKS_SILENT=y
 CONFIG_RINGBUF_PLACE_FUNCTIONS_INTO_FLASH=y
 CONFIG_FREERTOS_PLACE_FUNCTIONS_INTO_FLASH=y
 CONFIG_FREERTOS_PLACE_SNAPSHOT_FUNS_INTO_FLASH=y
+
+# Workaround for bug in IDFv5.5-v5.5.1
+# See https://github.com/espressif/esp-idf/issues/17436#issuecomment-3197206868
+CONFIG_NEWLIB_NANO_FORMAT=n
diff --git a/ports/esp32/lockfiles/dependencies.lock.esp32 b/ports/esp32/lockfiles/dependencies.lock.esp32
@@ -25,7 +25,7 @@ dependencies:
   idf:
     source:
       type: idf
-    version: 5.4.2
+    version: 5.5.1
 direct_dependencies:
 - espressif/lan867x
 - espressif/mdns
diff --git a/ports/esp32/lockfiles/dependencies.lock.esp32c2 b/ports/esp32/lockfiles/dependencies.lock.esp32c2
@@ -12,7 +12,7 @@ dependencies:
   idf:
     source:
       type: idf
-    version: 5.4.2
+    version: 5.5.1
 direct_dependencies:
 - espressif/mdns
 - idf
diff --git a/ports/esp32/lockfiles/dependencies.lock.esp32c3 b/ports/esp32/lockfiles/dependencies.lock.esp32c3
@@ -12,7 +12,7 @@ dependencies:
   idf:
     source:
       type: idf
-    version: 5.4.2
+    version: 5.5.1
 direct_dependencies:
 - espressif/mdns
 - idf
diff --git a/ports/esp32/lockfiles/dependencies.lock.esp32c6 b/ports/esp32/lockfiles/dependencies.lock.esp32c6
@@ -12,7 +12,7 @@ dependencies:
   idf:
     source:
       type: idf
-    version: 5.4.2
+    version: 5.5.1
 direct_dependencies:
 - espressif/mdns
 - idf
diff --git a/ports/esp32/lockfiles/dependencies.lock.esp32s2 b/ports/esp32/lockfiles/dependencies.lock.esp32s2
@@ -40,7 +40,7 @@ dependencies:
   idf:
     source:
       type: idf
-    version: 5.4.2
+    version: 5.5.1
 direct_dependencies:
 - espressif/esp_tinyusb
 - espressif/mdns
diff --git a/ports/esp32/lockfiles/dependencies.lock.esp32s3 b/ports/esp32/lockfiles/dependencies.lock.esp32s3
@@ -40,7 +40,7 @@ dependencies:
   idf:
     source:
       type: idf
-    version: 5.4.2
+    version: 5.5.1
 direct_dependencies:
 - espressif/esp_tinyusb
 - espressif/mdns
