A problem with the I2c LCD display

Projects Programming
1

In my project I am using mpu6050,servo motor,I2c LCD,and Arduino UNO
the prototype works just fine but the problem is with the LCD it doesn't display anything at all,
how can I fix it? thanks

#include <Servo.h> //Include Servo Motor library for using Servo
#include <LiquidCrystal_I2C.h> //Include LCD library for using LCD
#include <Wire.h> //Include WIre library for using I2C

const int MPU_addr=0x68; //I2C MPU6050 Address

Servo myservo; //myservo object for class servo

int16_t axis_X,axis_Y,axis_Z;

int minVal=265;
int maxVal=402;

double x;
double y;
double z;

int pos = 0;

LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup()
{

lcd.init(); // initialize the lcd
// Print a message to the LCD.
lcd.backlight();
Wire.begin(); //Begins I2C communication
Wire.beginTransmission(MPU_addr); //Begins Transmission with MPU6050
Wire.write(0x6B); //Puts MPU6050 in Sleep Mode
Wire.write(0); //Puts MPU6050 in power mode
Wire.endTransmission(true); //Ends Trasmission

myservo.attach(9); //Servo PWM pin as 9 in UNO

lcd.print("CIRCUIT DIGEST");
delay(1000);
lcd.clear();
lcd.setCursor(3,0);
lcd.print("Arduino");
lcd.setCursor(2,1);
lcd.print("MPU6050");
delay(3000);
lcd.clear();

}

void loop()
{

Wire.beginTransmission(MPU_addr); //Begins I2C transmission
Wire.write(0x3B); //Start with register 0x3B (ACCEL_XOUT_H)
Wire.endTransmission(false);
Wire.requestFrom(MPU_addr,14,true); //Request 14 Registers from MPU6050

axis_X=Wire.read()<<8|Wire.read(); //Obtain 0x3B (ACCEL_XOUT_H) & 0x3C (ACCEL_XOUT_L)
axis_Y=Wire.read()<<8|Wire.read(); //0x3B (ACCEL_YOUT_H) & 0x3C (ACCEL_YOUT_L)
axis_Z=Wire.read()<<8|Wire.read(); //0x3B (ACCEL_ZOUT_H) & 0x3C (ACCEL_ZOUT_L)

int xAng = map(axis_X,minVal,maxVal,-90,90);
int yAng = map(axis_Y,minVal,maxVal,-90,90);
int zAng = map(axis_Z,minVal,maxVal,-90,90);

x= RAD_TO_DEG * (atan2(-yAng, -zAng)+PI); //Formula to calculate x values in degree
int pos = map(x,0,180,0,180); // As X value is from 0 to 360 deg
myservo.write(pos); // Write angle obtained 0 to 180 to servo
lcd.setCursor(1,0);
lcd.print("Angle");
lcd.setCursor(2,1);
lcd.print(x);
delay(500);
lcd.clear();
}

2

Did you try running the examples that come with the LiquidCrystal_I2C library? Did they work?

3

Check first that the LCD alone works by uploading the following tested sketch sketch. If not, run address scanner, find the I2C address of the LCD, and then rerun the sketch. This is the library I have used for my LCD.

#include<LiquidCrystal_I2C.h> 
LiquidCrystal_I2C lcd(0x27, 16, 2);  //I2C address, characters per line of LCD, lines in LCD
void setup() 
{
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Forum"); 
}

void loop() 
{
 
}

LiquidCrystal_I2C-master.zip (8.98 KB)