af0c2da146
Implements first-boot Wi-Fi setup with no companion app required: a SoftAP + captive portal (DNS wildcard redirect, DHCP option 114, HTTP form) lets the user submit Wi-Fi credentials from any browser. On submit, credentials are saved to NVS and the device switches to STA mode; on subsequent boots it reconnects automatically via stored credentials. dns_server.c/.h are vendored from ESP-IDF's official captive_portal example (Unlicense/CC0). Requests both link-local and global IPv6 addresses once the STA connection has an IPv4 address (not on WIFI_EVENT_STA_CONNECTED -- esp_netif_create_ip6_linklocal() reliably fails there because esp-netif's own handler, which marks the lwIP netif "up", hasn't run yet due to event-handler registration order). Verified end-to-end on real ESP32-C6 hardware: SoftAP comes up, credential submission works, STA reconnects on reboot, and both a link-local and a router-assigned global IPv6 address are obtained via SLAAC. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
2.8 KiB
transport
Wi-Fi connectivity, MQTT client, and Home Assistant MQTT Discovery payloads. Exposes a semantic publish(topic, value)-style API — application code (including Lua) never depends on MQTT directly, per the transport abstraction principle in AGENTS.md. No dependency on other Kvida components.
Also owns Wi-Fi/MQTT configuration storage for now (not broken out into its own component since AGENTS.md doesn't call out a separate config layer — revisit if this grows).
Future transports (Zigbee, Thread, Matter) should implement the same publish API as alternate backends behind this component's interface, without changing callers.
Wi-Fi commissioning
include/commissioning.h / src/commissioning.cpp implement first-time Wi-Fi setup, no companion app required:
- On boot,
try_stored_credentials()attempts to connect using credentials saved in NVS from a previous session. - If none exist (or the caller chooses to),
start_commissioning()opens a SoftAP (Kvida-XXXXXX, derived from the MAC) with a captive portal: a DNS server (src/dns_server.c/.h, vendored from ESP-IDF's officialcaptive_portalexample, Unlicense/CC0) answers every query with the AP's own IP, and DHCP option 114 plus a 404-redirects-to-/HTTP handler get most phones/laptops to auto-open the setup page (src/portal.html) in a plain browser. - Submitting the form (
POST /connect) saves the credentials to NVS and switches Wi-Fi to STA mode. The AP is open (no password) by design -- see the comment aboveap_config.ap.authmodeincommissioning.cppfor the reasoning and the tradeoff. - A 5-minute
esp_timercloses the commissioning window automatically if nobody submits credentials. - IPv6: once STA gets its IPv4 address (
IP_EVENT_STA_GOT_IP-- notWIFI_EVENT_STA_CONNECTED, see the comment incommissioning.cppfor why that timing matters),esp_netif_create_ip6_linklocal()requests a link-local address (CONFIG_LWIP_IPV6=yis set explicitly insdkconfig.defaults);IP_EVENT_GOT_IP6is logged when it arrives. Verified end-to-end on real ESP32-C6 hardware. - Not yet wired up: re-entering commissioning on an already-configured device needs a physical trigger (the user button) per AGENTS.md's "configuration mode requires physical user interaction" principle -- blocked on
drivershaving a real button implementation. Network scanning (SSID dropdown instead of free text) was left out of this first pass to keep scope tight.
TODO: built on ESP-IDF's own esp_wifi and mqtt_client (esp-mqtt) components once real code lands — both ship with ESP-IDF, no extra registry dependency needed.
TODO: A/B OTA update-checking belongs here, driven by ESP-IDF's native esp_ota_ops against the ota_0/ota_1 partitions in partitions.csv — no extra dependency needed either.