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Add Lua runtime: chip temp -> LED color -> HA, verified live

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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>
This commit is contained in:
Ronny Eia
2026-07-12 09:17:06 +02:00
parent 3fee19c60a
commit eae6d3af5a
12 changed files with 328 additions and 122 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
main/CMakeLists.txt
View File

@@ -1,5 +1,5 @@
idf_component_register(
SRCS "main.cpp"
INCLUDE_DIRS "."
REQUIRES drivers sensors profiles transport lua_runtime esp_timer
)
idf_component_register(
SRCS "main.cpp"
INCLUDE_DIRS "."
REQUIRES drivers transport lua_runtime esp_timer
)

34
main/main.cpp
View File

@@ -1,27 +1,14 @@
#include "chip_temperature_sensor.h"
#include "commissioning.h"
#include "esp_log.h"
#include "esp_timer.h"
#include "lua_runtime.h"
#include "mqtt.h"
#include "rgb_led.h"
namespace {
constexpr const char *TAG = "kvida_os";
kvida::ChipTemperatureSensor g_chip_temp_sensor;
esp_timer_handle_t g_chip_temp_timer = nullptr;
void publish_chip_temperature_tick(void * /*arg*/)
{
if (!g_chip_temp_sensor.fetch()) {
return;
}
kvida::SensorValue value{};
if (g_chip_temp_sensor.get(kvida::SensorChannel::ChipTemperature, value)) {
float celsius = static_cast<float>(value.val1) + static_cast<float>(value.val2) * 1e-6f;
kvida::publish_chip_temperature(celsius);
}
}
esp_timer_handle_t g_lua_tick_timer = nullptr;
void on_led_color(uint8_t red, uint8_t green, uint8_t blue)
{
@@ -34,22 +21,23 @@ extern "C" void app_main(void)
{
ESP_LOGI(TAG, "kvida-os starting");
// Quick end-to-end data-flow proof (real Sensor impl -> MQTT/HA, and
// HA -> MQTT -> actuator) using only what's on the ESP32-C6-DevKitC-1
// itself: no sensor profiles or hardware wiring exist yet.
g_chip_temp_sensor.begin();
// The default Lua script (components/lua_runtime/src/default_script.h)
// reads chip temperature, drives the LED, and publishes to Home
// Assistant -- see that component's README for what's real here vs.
// still a "quick proof" using only what's on the ESP32-C6-DevKitC-1.
kvida::drivers::rgb_led_init();
kvida::lua_runtime_init();
kvida::set_led_color_handler(&on_led_color);
const esp_timer_create_args_t timer_args = {
.callback = &publish_chip_temperature_tick,
.callback = [](void *) { kvida::lua_runtime_tick(); },
.arg = nullptr,
.dispatch_method = ESP_TIMER_TASK,
.name = "chip_temp_publish",
.name = "lua_tick",
.skip_unhandled_events = true,
};
ESP_ERROR_CHECK(esp_timer_create(&timer_args, &g_chip_temp_timer));
ESP_ERROR_CHECK(esp_timer_start_periodic(g_chip_temp_timer, 30LL * 1000000));
ESP_ERROR_CHECK(esp_timer_create(&timer_args, &g_lua_tick_timer));
ESP_ERROR_CHECK(esp_timer_start_periodic(g_lua_tick_timer, 30LL * 1000000));
// First boot / no stored Wi-Fi credentials -> fall straight into
// commissioning (nothing to protect yet, so no physical-interaction