// Program for attiny3216 to control esp32
// created by Jans Hendry
// Universitas Gadjah Mada, Indonesia
// Kamakura Node, Japan
// fab academy MIT - 2022


// I2C connection
#include <Wire.h>
// Liquid crystal library                      
#include <LiquidCrystal_I2C.h>       
// Servo
#include <Servo.h>

// create lcd as an object
// format: address, num of columns, num of rows
LiquidCrystal_I2C lcd(0x27, 20, 4);

// servo object
Servo serv;
 
unsigned long waitagain = 500; // sec
unsigned long tdelta = 0;
const int sigToesp = 10;
const int Confbtn = 12;
const int indic = 16;
const int servopin = 5;
const int sigFromesp = 6;

byte ch0[8] = {
  0b00001,
  0b00011,
  0b00111,
  0b11111,
  0b11111,
  0b00111,
  0b00011,
  0b00001
};

byte ch1[8] = {
  0b00000,
  0b00100,
  0b01110,
  0b11111,
  0b11111,
  0b01110,
  0b00100,
  0b00000
};

void setup(){

  // start serial
  Serial.begin(9600);
  
  // setting up
  lcd.init();                    
  
  // turn on backlight <- the variable resistor has been adjusted
  lcd.backlight();
  
  // clear screen
  lcd.clear();
  
  // create costum character
  lcd.createChar(8, ch0); // arrow
  lcd.createChar(9, ch1); // unordered list

  // setup pins for signaling
  pinMode(sigToesp, OUTPUT);
  pinMode(Confbtn, INPUT_PULLUP);
  pinMode(indic, OUTPUT);
  pinMode(sigFromesp, INPUT);
  digitalWrite(indic, HIGH);
  digitalWrite(sigToesp, LOW);
  
  delay(500); // delay 0.5 sec

  serv.attach(servopin); // servo pin
  serv.write(0);

  menu(); // call menu
}

void loop(){
  if (digitalRead(sigFromesp) == HIGH){
    // Sweep from 0 to 180 degrees:
    for (int angle = 0; angle <= 180; angle += 1) {
      serv.write(angle);
      delay(15);
    }
    // And back from 180 to 0 degrees:
    for (int angle = 180; angle >= 0; angle -= 1) {
      serv.write(angle);
      delay(30);
    }
  }
  delay(2000); // take a breath
}

void menu(){
  // clear screen
  lcd.clear();

  // write menu
  lcd.setCursor(4, 0);
  lcd.write((byte)9);  
  lcd.setCursor(5, 0);
  lcd.print(" WELCOME ");
  lcd.setCursor(14, 0);
  lcd.write((byte)9);

  lcd.setCursor(0, 1);
  lcd.print("IoT Using ATTiny3216");
  lcd.setCursor(0, 2);
  lcd.print("Cloud: ThingSpeak");
  delay(3000);

  // Connect to WIFI
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("SSID: Baskom");
  lcd.setCursor(0, 1);
  lcd.print("Connecting ...");
  lcd.setCursor(0, 2);
  lcd.print("Frequency: 2.4 GHz");
  delay(1000);
  lcd.setCursor(0, 3);
  lcd.print("Connected");
  delay(1000);

  // confirm to send data to cloud
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.write((byte)8);
  lcd.setCursor(2, 0);
  lcd.print("Send Data Now?");
  while(digitalRead(Confbtn) != HIGH){
    // do nothing  
  }
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temper: ");
  lcd.setCursor(0, 1);
  lcd.print("Humid : "); 
  digitalWrite(sigToesp, HIGH); 

  // send temperature and humidity to esp32 for cloud transmision
  lcd.setCursor(8, 0);
  lcd.print("Sending..");

  lcd.setCursor(8, 1);
  lcd.print("Sending..");  
  digitalWrite(sigToesp, LOW);
}