Humidity sensor SEN0438

Hi,

The Humidity sensor SEN0438 is not transmitting any data to microcontroller Rx pin. The sensor connection is like this 

red          -    +12V     White - B of RS485 to TTL module

Black      -    Gnd       Yellow - A of RS485 to TTL module

RS485 to TTL module connection

RO - RX and DI toTX RE and DE ns joined and set to a GPIO pin 

The Code is here

     RE and DE pin high;
   USART_Transmit(0x01);
   USART_Transmit(0x03);
   USART_Transmit(0x00);
   USART_Transmit(0x00);
   USART_Transmit(0x00);
   USART_Transmit(0x02);
   USART_Transmit(0xC4);
   USART_Transmit(0x0B);
     _delay_ms(1);

   RE and DE pin high;

in =USART_Receive();    
   in =USART_Receive();
   in =USART_Receive();
   in =USART_Receive();
   in =USART_Receive();
   in =USART_Receive();
   in =USART_Receive();
   in =USART_Receive();

 No data is received .