frame_client_run() now does what it was always meant to: probe the tools
server, GET /frame/image and stream the response straight into the panel
via epd_display_stream() (esp_http_client's manual open/fetch_headers/read
API pulls in exactly the shape epd_display_stream()'s read_fn expects, so
the ~192KB frame never sits in RAM at once), then epd_sleep() and
esp_deep_sleep_start() for an hour.
Skips the WiFi/server status checklist screen on the happy path now that
there's a real photo to show instead -- three full refreshes every single
hour (status-pending, status-final, photo) wasn't worth it once bring-up
was actually working. Still shows it (status FAILED) when the server
isn't reachable, since nothing's been drawn yet that cycle and it's the
cheapest useful diagnostic. A mid-fetch failure after the panel's already
started refreshing just logs and retries sooner, rather than compounding
with a second refresh.
New Kconfig knobs: FRAME_FETCH_TIMEOUT_MS, FRAME_SLEEP_INTERVAL_S
(default 3600s), FRAME_RETRY_INTERVAL_S (default 300s on failure).
After a successful home WiFi connect, frame_client_run() now redraws the
panel as a two-row checklist (WiFi row with a checkmark, server row) so
the connection sequence is visible on-device rather than only in serial
logs. Refreshes once with the server row pending, probes the tools server
with a plain HTTP HEAD (any response, even 404, confirms the socket-level
connection works -- there's no real server yet), then refreshes again with
the final result. Two refreshes rather than one to actually show staged
progress, at the cost of the extra refresh time inherent to this panel.
Also fixes a second hardware-verified bug in the same area: on a failed
STA connect falling back to provisioning, wifi_init_softap()'s
esp_wifi_init() call was aborting with ESP_ERR_INVALID_STATE, because
frame_wifi_connect_sta() only stopped the WiFi driver on failure rather
than fully deinitializing it (and destroying the STA netif) before
handing back control.
Two frames on the same network would otherwise both advertise the same
ESPRESSO SSID during provisioning. Appends the last 3 bytes of the WiFi MAC
(read via esp_read_mac(), available before the WiFi driver starts) so each
device's softAP is uniquely named.
Splits provisioning (softAP + captive portal + NVS-backed config) into
wifi_provisioning.c and home-network connection into frame_client.c.
/save_config now parses the form body and persists it to NVS; on boot the
device goes straight to STA mode if a config exists, retrying a few times
before falling back to provisioning if the home network is unreachable.
The provisioning AP is now always named ESPRESSO with a random per-device
password (generated once, persisted in NVS) instead of a fixed Kconfig
value, drawn from a charset that avoids visually ambiguous characters since
it'll be read off the e-ink panel and possibly typed by hand.
Moves the existing ESP-IDF captive_portal example into firmware/ to make
room for the new FastAPI server and project docs, ahead of building out the
full ESPresso Frame project (ESP32-C6 + Immich-backed e-ink photo frame).
tfaour