pic16f877-dht11-MainFunction

void main(void) {
    // Initialize ports
    TRISB = 0b00000001;    // RB0 as input for DHT11
    TRISC = 0b10000000;    // Set RC6 as output for UART TX
    ADCON1 = 0x06;         // Configure PORTA pins as digital I/O
    
    // Timer1 configuration - 1:2 prescaler (Timer1 clock = 1MHz at 8MHz crystal)
    T1CON = 0x10;
    TMR1H = 0;
    TMR1L = 0;
    
    // Initialize UART
    UART_TX_Init();
    __delay_ms(1000);      // Initial delay
    
    while(1) {
        Start_Signal();     // Send start signal
        
        if(Check_Response()) {  // If sensor responds
            // Read all data bytes
            if(Read_Data(&RH_Byte1) || Read_Data(&RH_Byte2) ||
                    Read_Data(&T_Byte1) || Read_Data(&T_Byte2) ||
                    Read_Data(&CheckSum)) {
                UART_Write_Text("Sensor read timeout!\n\r");
            }
            else {  // If no timeout occurred
                if(CheckSum == ((RH_Byte1 + RH_Byte2 + T_Byte1 + T_Byte2) & 0xFF)) {
                    // Update message strings
                    Temperature[7] = T_Byte1/10 + '0';
                    Temperature[8] = T_Byte1%10 + '0';
                    Temperature[10] = T_Byte2/10 + '0';
                    Humidity[7] = RH_Byte1/10 + '0';
                    Humidity[8] = RH_Byte1%10 + '0';
                    Humidity[10] = RH_Byte2/10 + '0';
                    
                    // Send via UART
                    UART_Write_Text(Temperature);
                    UART_Write_Text("\n\r");
                    UART_Write_Text(Humidity);
                    UART_Write_Text("\n\r");
                }
                else {
                    UART_Write_Text("Checksum Error!\n\r");
                }
            }
        }
        else {
            UART_Write_Text("No response from sensor\n\r");
        }
        
        TMR1ON = 0;        // Disable Timer1
        __delay_ms(1000);  // Wait 1 second before next reading
    }
}