#include <WiFi.h>
#include <MQTT.h>

const char ssid[] = "Wokwi-GUEST";
const char pass[] = "";

WiFiClient net;
MQTTClient client;

unsigned long lastMillis = 0;

void connect() {
  Serial.print("checking wifi...");
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(1000);
  }

  Serial.print("\nconnecting...");
  while (!client.connect("clientid")) {
    Serial.print(".");
    delay(1000);
  }

  Serial.println("\nconnected!");
}

void setup() {
  pinMode(33, INPUT);
  Serial.begin(115200);
  WiFi.begin(ssid, pass);

  client.begin("broker.emqx.io", net);

  connect();
}

void loop() {
  client.loop();
  delay(10);  // <- fixes some issues with WiFi stability

  if (!client.connected()) {
    connect();
  }

  // publish a message roughly every second.
  if (millis() - lastMillis > 1000) {
    lastMillis = millis();
    int pot = analogRead(33);
    Serial.println(pot);
    client.publish("nusabot/pot", String(pot));
  }
}