Lcd display does not show any text.

#include <reg51.h>
#include <string.h>

#define LCD_DATA_PORT P0
sbit rs = P3^7;
sbit rw = P3^6;
sbit e = P3^5;

sbit fan = P2^0;
sbit bulb = P2^1;

void delay(unsigned int time) {
    unsigned int i, j;
    for (i = 0; i < time; i++)
        for (j = 0; j < 1275; j++);
}

void lcd_command(char cmd) {
 
    rs = 0;
    rw = 0;
        LCD_DATA_PORT = cmd;  // Send command
    e = 1;
    delay(1); // Adjust delay as needed
    e = 0;
}

void lcd_data(char store) {
 
    rs = 1;
    rw = 0;
        LCD_DATA_PORT = store;
    e = 1;
    delay(1); // Adjust delay as needed
    e = 0;
}

void lcd_init() {
 
    lcd_command(0x38); // 2 lines, 5x7 matrix
    delay(1);
    lcd_command(0x0C); // Turn on display (no cursor, no blink)
    delay(1);
    lcd_command(0x01); // Clear screen
    delay(1);
    lcd_command(0x80); // Set cursor to line 1
    delay(1);
}

void lcd_print(char *str) {
    while (*str) {
        lcd_data(*str++);
    }
}

void receive_data(char *buffer, int length) {
    int i = 0;
    while (i < length - 1) { // Ensure buffer doesn't overflow
        while (!RI); // Wait until receive flag is set
        if (SBUF == '\r') { // Ignore carriage return characters
            continue;
        }
        buffer[i++] = SBUF; // Read data from UART buffer
        RI = 0; // Clear receive flag
    }
    buffer[I] = '\0'; // Null-terminate the string[/I]
}

void process_command(char *command) {
    if (strcmp(command, "fan on") == 0) {
        fan = 1;
        lcd_command(0xC0); // Move cursor to line 2
        lcd_print("Fan on");
        delay(1000);
    } else if (strcmp(command, "fan off") == 0) {
        fan = 0;
        lcd_command(0xC0); // Move cursor to line 2
        lcd_print("Fan off");
        delay(1000);
    } else if (strcmp(command, "bulb on") == 0) {
        bulb = 1;
        lcd_command(0xC0); // Move cursor to line 2
        lcd_print("Bulb on");
        delay(1000);
    } else if (strcmp(command, "bulb off") == 0) {
        bulb = 0;
        lcd_command(0xC0); // Move cursor to line 2
        lcd_print("Bulb off");
        delay(1000);
    } else {
        lcd_command(0xC0); // Move cursor to line 2
        lcd_print("Wrong command");
        delay(1000);
    }
    lcd_command(0xC0); // Move cursor to line 2
    lcd_print("Waiting for cmd");
}

void main() {
    char receivedCommand[10];

    lcd_init();
    lcd_print("Home Automation");
    delay(2000);
    lcd_command(0xC0); // Move cursor to line 2
    lcd_print("Waiting for cmd");

    while (1) {
        receive_data(receivedCommand, 9); // Receive up to 9 characters (plus null terminator)
        process_command(receivedCommand);
    }
}
[I]