#include <WiFi.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
// #include <ESP32Servo.h> 

LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);


#define METER_PIN 13
#define RELAY_PIN 12

void spinner() {
  static int8_t counter = 0;
  const char* glyphs = "\xa1\xa5\xdb";
  LCD.setCursor(15, 1);
  LCD.print(glyphs[counter++]);
  if (counter == strlen(glyphs)) {
    counter = 0;
  }
}

void readKnob() {
  // struct tm timeinfo;
  // if (!getLocalTime(&timeinfo)) {
  //   LCD.setCursor(0, 1);
  //   LCD.println("Connection Err");
  //   return;
  // }
  int val = analogRead(METER_PIN);
  Serial.println(val);

  LCD.setCursor(0, 0);
  LCD.println(val);

  if (val > 500) {
    digitalWrite(RELAY_PIN, HIGH);
  } else {
    digitalWrite(RELAY_PIN, LOW);
  }
     
  // LCD.setCursor(0, 1);
  // LCD.println(&timeinfo, "%d/%m/%Y   %Z");
}

void setup() {
  Serial.begin(115200);
  pinMode(METER_PIN, INPUT);
  pinMode(RELAY_PIN, OUTPUT);


  LCD.init();
  LCD.backlight();
  LCD.setCursor(0, 0);
  LCD.clear();
}


// TODO: 1. LCD work
// TODO: 2. wiring
// TODO: 3. arduino mapping.
void loop() {
  readKnob();
  delay(50);
}