feat: ESP32-C3 OTA 中继项目 initial commit

2026-04-27 00:42:26 +08:00
commit bcfe130451
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+# ESP32-C3FH4 OTA Relay
+
+Complete firmware for ESP32-C3FH4 acting as OTA relay between APP/PC and GD32E508VET6.
+
+## Build
+
+```bash
+export IDF_PATH=/path/to/esp-idf
+source $IDF_PATH/export.sh
+mkdir build && cd build
+cmake ..
+make
+```
+
+## Structure
+
+```
+main/
+  main.c           - Entry point, task creation
+  app_main.c       - Application init, system monitor task
+  ota_relay.c      - 4-stage OTA state machine
+  spi_master.c     - SPI2 (VSPI) master driver
+  protocol.c       - Frame format, CRC16, AES, scramble
+  wifi_ota.c       - WiFi AP/STA + HTTP server
+  ble_ota.c        - BLE GATT server
+  health_monitor.c - Temperature/voltage/WiFi monitoring
+```
+
+## Features
+
+- WiFi AP mode (SSID: ESP32_OTA_RELAY, pw: 12345678)
+- BLE GATT OTA service
+- HTTP POST /ota/upload for firmware
+- SPI to GD32 (40MHz, GPIO4-9)
+- Flash storage with断点续传
+- System health monitoring
+
+## TODO (confirm with GD32 team)
+
+- MASTER_KEY_HERE - AES-128 master key (16 bytes)
+- SCRAMBLE_CONST_HERE - scramble algorithm seed
+- CHIP_UID_HERE - GD32 chip unique ID
+- GATT UUIDs for OTA service