Environment Requirements

Software Environment

Item	Requirement
ESP-IDF	6.1.x (verified); the component declares >=6.1; behavior consistency is not guaranteed for unverified versions
C++ standard	C++20
Target chip	ESP32-S3 (currently verified only on the N16R8 module)
Flash	The example uses a 16 MB module; actual firmware usage depends on the build
PSRAM	Strongly recommended

The component source disables exceptions and RTTI; the component implementation depends on esp_netif, lwip, freertos, and mbedtls (PSA Crypto).

Memory Requirements

Item	Approximate size	Description
Single instance resident	About 100 KiB	Component runtime context
Per peer connection	About 12 KiB	6 by default at most
Task stack	About 24 KiB	Total for component tasks; adjustable via Kconfig
Queues/buffers	Tens of KiB	Depends on the queue depth configuration

The figures above are approximate, not hard guarantees; actual usage depends on build logs and runtime measurements. PSRAM is recommended, otherwise the default configuration may easily fail during allocation.

Sockets and Main Task Stack

The example writes the following two settings to sdkconfig.defaults:

CONFIG_LWIP_MAX_SOCKETS=24
CONFIG_ESP_MAIN_TASK_STACK_SIZE=8192

• LWIP_MAX_SOCKETS: The default of 10 may not be enough for peer entry connections + application sockets + lwIP internal usage;
• MAIN_TASK_STACK_SIZE: TOML parsing and Inst construction run on the caller's task stack; at least 8 KiB is recommended.

If you construct et::Inst in another task, make sure that task's stack is large enough as well, and use uxTaskGetStackHighWaterMark() to check the remaining margin.

Verified Combinations

• ESP32-S3-N16R8 module
• ESP-IDF 6.1
• EasyTier 2.6.4 ~ 2.7.0

Other versions are not "explicitly unsupported"; they are simply unverified. Before using in production, complete your own build, real-device integration testing, and stability testing.