Initial: knowledge base

components/esp32-h2_specs.md

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+# ESP32-H2 Specifications
+> **芯片：esp32-h2** | **类别：specs** | **信源：** [Espressif 官方文档](https://docs.espressif.com)
+
+## 1. Core Architecture
+- **CPU:** Single-core RISC-V, 96 MHz（303.38 CoreMark）— 全系列最低主频.
+- **Wireless:** BLE 5.3, Zigbee/Thread (802.15.4). **Note: No Wi-Fi support.**
+- **Application:** Smart home devices, Matter over Thread, low-power sensors — 超低功耗传感器节点.
+
+## 2. Memory
+- **SRAM:** 320 KB internal.
+- **LP Memory:** 4 KB.
+- **ROM:** 128 KB.
+- **内置 Flash:** 2 MB 或 4 MB QSPI.
+
+## 3. Peripheral Mapping
+- **GPIO Count:** 芯片 19 个，模组 WROOM-02C 19 个 / WROOM-07 仅 3 个.
+- **ADC:** 5 channels, 12-bit（GPIO1–5）.
+- **DAC:** **None.**
+- **Touch:** **None.**
+- **Hardware PWM:** LEDC 6ch + MCPWM.
+- **UART:** 2 controllers.
+- **I2C:** 2 controllers.
+- **SPI:** 3 controllers.
+- **I2S:** 1 controller.
+- **CAN (TWAI):** 1 controller.
+- **USB Serial/JTAG:** 1.
+- **PARLIO:** 1.
+
+## 4. Hardware Safety & Constraints
+- **No Wi-Fi:** 这是 H2 与 C6 最大的区别。需要 WiFi+Thread → 选 C6.
+- **Strapping Pins:** GPIO8, GPIO9, GPIO25.
+- **LP GPIO:** GPIO8–14 可在 Deep-sleep 下保持功能.
+- **数字 GPIO:** GPIO0–5, GPIO22–27 只能在 Light-sleep 唤醒，不能在 Deep-sleep 唤醒.
+- **功耗极低:** BLE + 802.15.4 TX 峰值 ~60 mA, Deep-sleep ~7 µA.
+- **供电:** 3.0–3.6V, 推荐 3.3V.
+- **工作温度:** −40°C ~ +105°C.
+- **封装:** QFN32 (4×4mm).
+
+## 5. 无线协议
+- Bluetooth 5.3 LE, Mesh, Coded PHY (125/500 Kbps), 2 Mbps
+- Thread 1.4
+- Zigbee 3.0
+- Matter
+- 802.15.4 RX Sensitivity: -102.5 dBm (250 Kbps)
+
+## 6. 模组选型注意
+- WROOM-02C：GPIO 数=19, 天线=PCB, Flash=2/4 MB
+- WROOM-07：GPIO 数=**仅 3 个**, 天线=外置, Flash=2/4 MB