tinkercad I2C LCDs

#include <Wire.h>

#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd1(0x20,16,2);

LiquidCrystal_I2C lcd2(0x21,16,2);

byte Up[8] = {

  0b00000,

0b00100,

0b01110,

  0b11111,

  0b00100,

  0b00100,

  0b00100,

  0b00000,

};

byte Down[8] = {

  0b00000,

0b00100,

0b00100,

  0b00100,

  0b11111,

  0b01110,

  0b00100,

  0b00000,

};

void setup()

{

  lcd1.init();

  lcd1.clear(); 

  lcd1.backlight(); 

  

  lcd1.createChar(0, Up);

  lcd1.createChar(1, Down);

  

  lcd1.setCursor(4,0); 

  lcd1.print("Commodities LCD 0x20");

  lcd1.setCursor(0,1);

  lcd1.print("Brent Oil ");

  lcd1.write(0);

  lcd1.print("0.87% ");

  lcd1.print("Natural Gas ");

  lcd1.write(0);

  lcd1.print("0.43% ");

  

  lcd2.init();

  lcd2.clear(); 

  lcd2.backlight(); 

  

  lcd2.createChar(0, Up);

  lcd2.createChar(1, Down);

  

  lcd2.setCursor(4,0); 

  lcd2.print("Commodities LCD 0x21");

  lcd2.setCursor(0,1);

  lcd2.print("Gold ");

  lcd2.write(0);

  lcd2.print("0.12% ");

  lcd2.print("Soybeans ");

  lcd2.write(1);

  lcd2.print("0.84% ");

}

void loop()

{

   lcd1.scrollDisplayLeft();     

   lcd2.scrollDisplayLeft(); 

  

  delay(200);

}

//I2C address sniffer

#include <Wire.h>

void setup()

{

  Serial.begin (9600);

  // Leonardo: wait for serial port to connect

  while (!Serial) 

    {

    }

  Serial.println ();

  Serial.println ("I2C scanner. Scanning ...");

  byte count = 0;

  

  Wire.begin();

  for (byte i = 8; i < 120; i++)

  {

    Wire.beginTransmission (i);

    if (Wire.endTransmission () == 0)

      {

      Serial.print ("Found address: ");

      Serial.print (i, DEC);

      Serial.print (" (0x");

      Serial.print (i, HEX);

      Serial.println (")");

      count++;

      delay (1);  // maybe unneeded?

      } // end of good response

  } // end of for loop

  Serial.println ("Done.");

  Serial.print ("Found ");

  Serial.print (count, DEC);

  Serial.println (" device(s).");

}

void loop()

{

 

}

reference:

https://lastminuteengineers.com/i2c-lcd-arduino-tutorial/

scroll left

https://www.make-it.ca/i2c-lcd-display-on-arduino/

multiple LCDS

https://miliohm.com/how-to-use-i2c-lcd-backpack-and-how-to-use-multiple-lcd-with-1-arduino-tutorial/