light.ino

#include <Ethernet.h>
#include <ArduinoHA.h>

#define BROKER_ADDR     IPAddress(192,168,0,17)

byte mac[] = {0x00, 0x10, 0xFA, 0x6E, 0x38, 0x4A};

EthernetClient client;
HADevice device(mac, sizeof(mac));
HAMqtt mqtt(client, device);

// HALight::BrightnessFeature enables support for setting brightness of the light.
// HALight::ColorTemperatureFeature enables support for setting color temperature of the light.
// Both features are optional and you can remove them if they're not needed.
// "prettyLight" is unique ID of the light. You should define your own ID.
HALight light("prettyLight", HALight::BrightnessFeature | HALight::ColorTemperatureFeature | HALight::RGBFeature);

void onStateCommand(bool state, HALight* sender) {
    Serial.print("State: ");
    Serial.println(state);

    sender->setState(state); // report state back to the Home Assistant
}

void onBrightnessCommand(uint8_t brightness, HALight* sender) {
    Serial.print("Brightness: ");
    Serial.println(brightness);

    sender->setBrightness(brightness); // report brightness back to the Home Assistant
}

void onColorTemperatureCommand(uint16_t temperature, HALight* sender) {
    Serial.print("Color temperature: ");
    Serial.println(temperature);

    sender->setColorTemperature(temperature); // report color temperature back to the Home Assistant
}

void onRGBColorCommand(HALight::RGBColor color, HALight* sender) {
    Serial.print("Red: ");
    Serial.println(color.red);
    Serial.print("Green: ");
    Serial.println(color.green);
    Serial.print("Blue: ");
    Serial.println(color.blue);

    sender->setRGBColor(color); // report color back to the Home Assistant
}

void setup() {
    Serial.begin(9600);

    // you don't need to verify return status
    Ethernet.begin(mac);

    // set device's details (optional)
    device.setName("Arduino");
    device.setSoftwareVersion("1.0.0");

    // configure light (optional)
    light.setName("Bathroom");

    // Optionally you can set retain flag for the HA commands
    // light.setRetain(true);

    // Maximum brightness level can be changed as follows:
    // light.setBrightnessScale(50);

    // Optionally you can enable optimistic mode for the HALight.
    // In this mode you won't need to report state back to the HA when commands are executed.
    // light.setOptimistic(true);

    // Color temperature range (optional)
    // light.setMinMireds(50);
    // light.setMaxMireds(200);

    // handle light states
    light.onStateCommand(onStateCommand);
    light.onBrightnessCommand(onBrightnessCommand); // optional
    light.onColorTemperatureCommand(onColorTemperatureCommand); // optional
    light.onRGBColorCommand(onRGBColorCommand); // optional

    mqtt.begin(BROKER_ADDR);
}

void loop() {
    Ethernet.maintain();
    mqtt.loop();

    // You can also change the state at runtime as shown below.
    // This kind of logic can be used if you want to control your light using a button connected to the device.
    // light.setState(true); // use any state you want
}