Thermometer_code.txt

#include <reg51.h>

// Define LCD control signals
sbit RS = P2^0;   // Register select signal
sbit RW = P2^1;   // Read/Write signal
sbit EN = P2^2;   // Enable signal

// Function to initialize the LCD
void LCD_Init() {
    delay_ms(20);   // Wait for LCD to power up
    
    // Initialize LCD in 4-bit mode
    LCD_Command(0x02);  // 4-bit mode
    LCD_Command(0x28);  // 2 lines, 5x7 matrix
    LCD_Command(0x0E);  // Display ON, cursor ON
    LCD_Command(0x01);  // Clear display
    LCD_Command(0x80);  // Move cursor to the beginning of the first line
}

// Function to send commands to LCD
void LCD_Command(unsigned char cmd) {
    LCD_Data_Port = (LCD_Data_Port & 0x0F) | (cmd & 0xF0);  // Send higher nibble
    RS = 0;     // Select command register
    RW = 0;     // Write mode
    EN = 1;     // Enable LCD
    delay_us(1);
    EN = 0;     // Disable LCD
    
    delay_us(100);
    
    LCD_Data_Port = (LCD_Data_Port & 0x0F) | (cmd << 4);    // Send lower nibble
    EN = 1;     // Enable LCD
    delay_us(1);
    EN = 0;     // Disable LCD
    
    delay_ms(2);
}

// Function to send data to LCD
void LCD_Data(unsigned char dat) {
    LCD_Data_Port = (LCD_Data_Port & 0x0F) | (dat & 0xF0);  // Send higher nibble
    RS = 1;     // Select data register
    RW = 0;     // Write mode
    EN = 1;     // Enable LCD
    delay_us(1);
    EN = 0;     // Disable LCD
    
    delay_us(100);
    
    LCD_Data_Port = (LCD_Data_Port & 0x0F) | (dat << 4);    // Send lower nibble
    EN = 1;     // Enable LCD
    delay_us(1);
    EN = 0;     // Disable LCD
    
    delay_ms(2);
}

// Function to display temperature on LCD
void Display_Temperature(unsigned int temp) {
    char temp_str[6];
    sprintf(temp_str, "Temp: %dC", temp);
    
    LCD_Command(0x01);  // Clear display
    LCD_Command(0x80);  // Move cursor to the beginning of the first line
    for (int i = 0; temp_str[i] != '\0'; i++) {
        LCD_Data(temp_str[i]);
    }
}

// Function to read temperature from the sensor
unsigned int Read_Temperature() {
    // Code to read temperature from sensor and convert it to Celsius
    // Replace this with your actual sensor reading and conversion logic
    // For example, if you are using LM35 sensor:
    // unsigned int raw_value = analog_read();  // Replace with actual ADC reading
    // unsigned int temp = ((raw_value * 500) / 1024);  // LM35 scaling
    // return temp;
    
    return 25;  // Placeholder value for demonstration
}

void main() {
    LCD_Init();
    
    while (1) {
        unsigned int temperature = Read_Temperature();
        Display_Temperature(temperature);
        
        delay_ms(1000);  // Delay before updating the temperature reading
    }
}