eae6d3af5a
Sandboxed Lua state (espressif/lua v5.5.0, base/table/string/math only, no io/os/package/debug) exposes a kvida API table (chip_temperature, set_led, publish) to a compiled-in default script that reads chip temperature, maps it to an LED color, and publishes the reading to Home Assistant. Generalizes transport's publish_chip_temperature() into publish_value(name, value), the first real use of AGENTS.md's semantic publish API. Requires -DLUA_32BITS globally since this toolchain's long long support isn't visible to Lua's default build. Verified on real ESP32-C6 hardware: no crashes/errors across multiple serial monitor windows, LED changes color, chip_temperature sensor appears in Home Assistant via MQTT Discovery. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
33 lines
1.3 KiB
C++
33 lines
1.3 KiB
C++
#pragma once
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#include <cstdint>
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namespace kvida {
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// Starts mDNS-based MQTT broker discovery (_mqtt._tcp) and, once found,
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// connects the MQTT client and publishes Home Assistant MQTT Discovery
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// for a diagnostic "connectivity" entity. Safe to call multiple times
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// (no-op if already connecting/connected).
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void start_mqtt();
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bool mqtt_connected();
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// Publishes a named numeric value as a Home Assistant MQTT Discovery
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// sensor: `kvida/<id>/<name>` state topic, `homeassistant/sensor/<id>/<name>/config`
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// discovery topic. This is the semantic publish(name, value) API AGENTS.md
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// describes -- driven by `lua_runtime`'s `kvida.publish()`, not called
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// directly by other components. Discovery is republished (retained, so
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// idempotent) on every call rather than cached behind a per-name
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// "already announced" flag -- simpler, at the cost of a bit of extra
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// retained-message traffic each call. TODO: cache announced names if
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// that traffic becomes a real concern.
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void publish_value(const char *name, double value);
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// Registered by main to receive "set LED color" commands from Home
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// Assistant (an RGB light entity) without transport depending on
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// `drivers` directly.
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using LedColorHandler = void (*)(uint8_t red, uint8_t green, uint8_t blue);
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void set_led_color_handler(LedColorHandler handler);
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} // namespace kvida
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