sketch.cpp

#include <inttypes.h>
#include <Arduino.h>
#include <Wire.h>

uint8_t lcd_addr = 0x24;

void setup() {
  Wire.begin();
  // put your setup code here, to run once:
  Serial.begin(9600);
  Serial.println("\nI2C Scannerzzzzzz");

}

void loop() {
  Wire.beginTransmission(lcd_addr);
  Wire.write(B10101010);
  Wire.endTransmission();
  // Serial.println("\nON");
  delay(200);
  Wire.beginTransmission(lcd_addr);
  Wire.write(B01010101);
  Wire.endTransmission();

  // Serial.println("\nOFF");
  delay(200);
}