Updating the buried ESP-01S currently means a USB-UART adapter and a
GPIO0 jumper. Add a path to change its settings without reflashing, and
lay the groundwork for full firmware updates over the existing UART.
set_config (no reflash for settings):
- ESP-01S: add saveConfig() + a set_config command — updates GoPro
SSID/password/IP and poll interval, persists to LittleFS, acks, and
re-associates Wi-Fi if creds changed
- XIAO: forward an MQTT set_camera_config down to the ESP-01S over UART
(hub -> MQTT -> XIAO -> UART -> ESP-01S/LittleFS)
UART-OTA groundwork ("XIAO as flasher"):
- reserve XIAO GPIOs ESP01_RST_PIN=D8, ESP01_PGM_PIN=D10 for driving the
ESP-01S serial bootloader (not driven yet)
- docs/design/esp01s-uart-ota.md: full design (why Wi-Fi OTA doesn't fit
the 1MB ESP-01S on the GoPro AP, bootloader entry, ROM flash protocol,
HTTP-pull delivery, scope)
- hardware/README.md: fix stale ESP32-C3 -> XIAO ESP32-C6 wiring, add the
two control lines (Notion wiring diagram updated to match)
Both firmwares build clean and are flashed; set_config round-trip needs
the broker to exercise end-to-end.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Joshua King
overseer
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