//Generated Date: Sat, 02 Mar 2024 15:11:34 GMT

#include <WiFi.h>
#include <PubSubClient.h>
#define MQTT_USER ""
#define MQTT_PASSWORD ""

char _lwifi_ssid[] = "Wokwi-GUEST";
char _lwifi_pass[] = "";
const char* mqtt_server = "broker.emqx.io";
const unsigned int mqtt_port = 1883;
WiFiClient espClient;
PubSubClient mqtt_client(espClient);
String mqtt_data = "";

void mqtt_sendText(String topic, String text) {
    String clientId = "cn017_1";
    if (mqtt_client.connect(clientId.c_str(), MQTT_USER, MQTT_PASSWORD)) {
      mqtt_client.publish(topic.c_str(), text.c_str());
    }
}

void reconnect() {
  while (!mqtt_client.connected()) {
    String mqtt_clientId = "cn017_1";
    if (mqtt_client.connect(mqtt_clientId.c_str(), MQTT_USER, MQTT_PASSWORD)) {
      Serial.println("MQTT OK");
  mqtt_client.subscribe("lhucin/D110IOT/cn017/ch05/btn");
  mqtt_client.subscribe("lhucin/D110IOT/cn017/ch05/value");
    } else {
      delay(5000);
    }
  }
}

boolean led_Auto = false;
boolean btn = false;
int light = 0;
int value = 90;

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

  randomSeed(micros());
  mqtt_client.setServer(mqtt_server,mqtt_port);
  mqtt_client.setCallback(callback);
  //mqtt_client.setBufferSize(1024);

  Serial.println("Wifi....");
  WiFi.disconnect();
  WiFi.softAPdisconnect(true);
  WiFi.mode(WIFI_STA);
  WiFi.begin(_lwifi_ssid, _lwifi_pass);
  while (WiFi.status() != WL_CONNECTED) { delay(500); }
  delay(300);
  Serial.println("MQTT....");
  pinMode(4, INPUT);
  pinMode(2, OUTPUT);
}

void loop()
{
  if (!mqtt_client.connected()) {
    reconnect();
  }
  mqtt_client.loop();
  if (digitalRead(4) && !btn) {
    btn = !btn;
    led_Auto = !led_Auto;
  }
  if (!digitalRead(4) && btn) {
    btn = !btn;
  }
  light = analogRead(35);
  Serial.println((String("btn: ")+String(btn)+String(", led_auto: ")+String(led_Auto)+String(", light:")+String(light)));
  if (led_Auto) {
    if (light < value) {
      digitalWrite(2, HIGH);
      Serial.println((String("Auto-light: ")+String(light)+String(", value: ")+String(value)+String(", ON")));
      mqtt_sendText("lhucin/D110IOT/cn017/ch05/led", "1");
    } else {
      digitalWrite(2, LOW);
      Serial.println((String("Auto-light: ")+String(light)+String(", value: ")+String(value)+String(", OFF")));
      mqtt_sendText("lhucin/D110IOT/cn017/ch05/led", "0");
    }
  } else {
    digitalWrite(2, HIGH);
    Serial.println((String("light: ")+String(light)+String(", ON")));
    mqtt_sendText("lhucin/D110IOT/cn017/ch05/led", "1");
  }
  mqtt_sendText("lhucin/D110IOT/cn017/ch05/light", String(light));
  delay(300);
}

void callback(char* topic, byte* payload, unsigned int length) {
  mqtt_data = "";
  for (int ci = 0; ci < length; ci++) {
    char c = payload[ci];
    mqtt_data+=c;
  }
  if (String(topic)=="lhucin/D110IOT/cn017/ch05/value"&&mqtt_data!="[]") {
    Serial.println((mqtt_data));
    value = (mqtt_data).toInt();
    mqtt_sendText("lhucin/D110IOT/cn017/ch05/value", String(value));
  }
}