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Kod: Markera allt

#include <stdio.h>
#include <string.h>
#include "uart.h"  // Assuming you have a UART driver library for your platform

// AT Command timeout in milliseconds
#define AT_COMMAND_TIMEOUT 2000

// Send AT command function
int sendATCommand(char *cmd, char *response, int timeout) {
    uart_write(cmd);  // Write the AT command to the module
    uart_write("\r\n");
    
    int bytesRead = uart_read(response, 256, timeout);  // Read the response from the module
    if (bytesRead > 0) {
        return 1;  // Success
    } else {
        return 0;  // Timeout or failure
    }
}

// Function to initialize the 4G LTE module
int init4GLTEModule() {
    char response[256];

    // Reset the module
    if (!sendATCommand("AT+CSQ", response, AT_COMMAND_TIMEOUT)) {
        printf("Error: No response from the module\n");
        return 0;
    }
    
    // Check the module version (optional, to verify communication)
    if (!sendATCommand("ATI", response, AT_COMMAND_TIMEOUT)) {
        printf("Error: Failed to get module information\n");
        return 0;
    }
    printf("Module Info: %s\n", response);
    
    // Set SMS mode to text mode
    if (!sendATCommand("AT+CMGF=1", response, AT_COMMAND_TIMEOUT)) {
        printf("Error: Failed to set SMS text mode\n");
        return 0;
    }
    
    // Check network registration
    if (!sendATCommand("AT+CREG?", response, AT_COMMAND_TIMEOUT)) {
        printf("Error: No network registration\n");
        return 0;
    }
    
    return 1;  // Module initialized successfully
}

// Function to send an SMS
int sendSMS(const char *phoneNumber, const char *message) {
    char command[256];
    char response[256];
    
    // AT command to send an SMS
    snprintf(command, sizeof(command), "AT+CMGS=\"%s\"", phoneNumber);
    
    // Send the AT command to the module
    if (!sendATCommand(command, response, AT_COMMAND_TIMEOUT)) {
        printf("Error: Failed to send SMS command\n");
        return 0;
    }

    // Send the message text
    uart_write(message);
    uart_write("\r\n");

    // Send the end of message (Ctrl+Z, 0x1A in ASCII)
    uart_write("\x1A");
    
    // Wait for the response from the module
    if (!sendATCommand("", response, AT_COMMAND_TIMEOUT)) {
        printf("Error: Failed to send SMS\n");
        return 0;
    }

    printf("SMS sent successfully\n");
    return 1;
}

int main() {
    // Initialize UART communication
    uart_init(9600);  // Assuming 9600 baud rate for the UART communication

    // Initialize the 4G LTE module
    if (!init4GLTEModule()) {
        printf("Error: LTE Module initialization failed\n");
        return -1;
    }
    
    // Send SMS
    const char *phoneNumber = "+1234567890";  // Replace with the recipient's phone number
    const char *message = "Hello from 4G LTE module!";
    if (!sendSMS(phoneNumber, message)) {
        printf("Error: SMS sending failed\n");
        return -1;
    }
    
    return 0;
}