PlatformIO + pioarduino + M5StickC Plus2: Cannot compile due to I2S v2 API incompatibility

[pmolsen]

I’m using an M5StickC Plus2 and the M5Stack SPK2 Hat (I2S speaker). In the Arduino IDE, everything works perfectly using ESP32-audioI2S with Arduino core 3.x. Now I’m trying to use PlatformIO with pioarduino (ESP32 core 3.x fork) to get the same audio playback working.

❌ Problem Compilation fails due to:

error: 'i2s_chan_handle_t' does not name a type This comes from code that uses the new I2S v2 API (i2s_std_config_t, i2s_chan_handle_t, etc.).

This seems related to PlatformIO’s use of its own build system and lack of ESP-IDF header propagation or mismatched SDKs.

⚙️ My Setup PlatformIO platformio.ini: platform = https://github.com/pioarduino/platform-espressif32.git board = m5stick-c framework = arduino monitor_speed = 115200 lib_deps = https://github.com/m5stack/M5Unified.git#8b25496 https://github.com/m5stack/M5GFX.git#develop arduino-libraries/Arduino_BMI270_BMM150 paulstoffregen/Mahony adafruit/Adafruit Unified Sensor adafruit/Adafruit BusIO adafruit/Adafruit BMP280 Library arduino-libraries/WiFi schreibfaul1/ESP32-audioI2S m5stack/M5Unified 🔍 What I've Tried Works in Arduino IDE with Arduino core 3.0.0

Fails in PlatformIO (even with pioarduino)

Tried modifying library includes to manually pull in ESP-IDF 5 headers — no success Tried every other audio library I could find but all fail, both on espressif32 and pioarduino 💡 Feature Request Could you provide:

Either a backwards-compatible version using the I2S v1 API (e.g., i2s_config_t)

Or guidance for PlatformIO+pioarduino users to get this compiling?

Thank you for the great library and all your work!

[schreibfaul1]

I suspect the Arduino version is < V3 because: error: 'i2s_chan_handle_t' does not name a type Try this template, https://github.com/schreibfaul1/ESP32_Arduino_ESPIDF

[pmolsen]

"Following your ESP32_Arduino_ESPIDF template recommendation, I'm getting multiple ESP-IDF configuration issues:

FreeRTOS tick rate mismatch: esp32-arduino requires CONFIG_FREERTOS_HZ=1000 (currently 100) Git repository errors: Multiple fatal: not a git repository messages Bluetooth config warning: BTDM_CTRL_CONTROLLER_DEBUG_MODE_1 has a "visible if" option, which is not supported Missing project commits: ESP Insights Project commit: HEAD-HASH-NOTFOUND

How should these be configured in your template for proper Arduino+ESP-IDF integration?"

fatal: not a git repository (or any of the parent directories): .git fatal: not a git repository (or any of the parent directories): .git ESP Insights Project commit: HEAD-HASH-NOTFOUND ESP RainMaker Project commit: HEAD-HASH-NOTFOUND CMake Error at C:/Users/peter/.platformio/packages/framework-arduinoespressif32/CMakeLists.txt:377 (message): esp32-arduino requires CONFIG_FREERTOS_HZ=1000 (currently 100)

Here is my ini

[env:m5stick-c] platform = https://github.com/pioarduino/platform-espressif32.git board = m5stick-c framework = arduino, espidf monitor_speed = 115200 build_flags = -D CORE_DEBUG_LEVEL=3 -D CONFIG_ARDUHAL_LOG_COLORS=1 -D ARDUINO_RUNNING_CORE=1 -D ARDUINO_EVENT_RUNNING_CORE=1 -D AUDIOTASK_CORE=0 -D BOARD_HAS_PSRAM=1 -D CONFIG_FREERTOS_HZ=1000 -Wall -Wextra -I$PROJECT_PACKAGES_DIR/framework-arduinoespressif32/variants/m5stack_stickc_plus2 lib_deps = https://github.com/m5stack/M5Unified.git https://github.com/m5stack/M5GFX.git arduino-libraries/Arduino_BMI270_BMM150 paulstoffregen/Mahony adafruit/Adafruit Unified Sensor adafruit/Adafruit BusIO arduino-libraries/WiFi https://github.com/schreibfaul1/ESP32-audioI2S.git

We added -D CONFIG_FREERTOS_HZ=1000

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