#include "HX711.h"
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <WiFi.h>
#include <PubSubClient.h>
Adafruit_SSD1306 display(128, 64, &Wire, -1);
HX711 scale;
uint16_t berat1 = 0;
String pesan = "";
const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "mqtt-dashboard.com";
WiFiClient espClient;
PubSubClient client(espClient);
void setup_wifi() {
  delay(10);
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  randomSeed(micros());
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}
void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    String clientId = "ESP32Client-";
    clientId += String(random(0xffff), HEX);
    if (client.connect(clientId.c_str())) {
      Serial.println("connected");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}
void setup() {
  Serial.begin(115200);
  scale.begin(19, 18);//DT,SCK
  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;);
  }
  setup_wifi();
  client.setServer(mqtt_server, 1883);
}
void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();
  uint16_t berat = round(scale.get_units() * 50 / 21); //gram
  pesan = "{\"gram\":" + String(berat) + "}";
  if (berat != berat1) {
    Serial.print("Publish message: ");
    Serial.println(pesan);
    client.publish("wokwi_ebpro/berat", pesan.c_str());
    display.clearDisplay();
    display.setTextSize(3);
    display.setTextColor(WHITE);
    display.setCursor(0, 0);
    display.println(F("Berat:"));
    display.setCursor(0, 35);
    display.print(berat / 1000.0, 1);
    display.println(F(" kg"));
    display.display();
  }
  berat1 = berat;
}