Sim800 and pushingbox get request format

Projects Programming
1

Hello!

I will send data to pushingbox, from browser the sending is works good.

From arduino+Sim800 duo is not working...

I probaly

void SendData()
{
 
  Serial.println("AT");
  delay(1000);

  Serial.println("AT+CPIN?");
  delay(1000);

  Serial.println("AT+CREG?");
  delay(1000);

  Serial.println("AT+CGATT?");
  delay(1000);

  Serial.println("AT+CIPSHUT");
  delay(1000);

  Serial.println("AT+CIPSTATUS");
  delay(2000);

  Serial.println("AT+CIPMUX=0");
  delay(2000);
 
  ShowSerialData();
 
  Serial.println("AT+CSTT=\"internet\"");//start task and setting the APN,
  delay(1000);
 
  ShowSerialData();
 
  Serial.println("AT+CIICR");//bring up wireless connection
  delay(3000);
 
  ShowSerialData();
 
  Serial.println("AT+CIFSR");//get local IP adress
  delay(2000);
 
  ShowSerialData();
 
  Serial.println("AT+CIPSPRT=0");
  delay(3000);
 
  ShowSerialData();
  
  Serial.println("AT+CIPSTART=\"TCP\",\"api.pushingbox.com\",\"80\"");//start up the connection
  delay(6000);
  
  Serial.println("AT+CIPSEND=79");//begin send data to remote server
  delay(4000);
  ShowSerialData();
   Serial.print("GET http://api.pushingbox.com/pushingbox?devid=v3094B979C1ECCD1&strm=33.3");
  delay(1000);
  Serial.println(" HTTP/1.1 Host: api.pushingbox.com\r\n\r\n");
  Serial.println();
  delay(500);
  ShowSerialData();
  delay(500);
  ShowSerialData();
  delay(500);
  ShowSerialData();
  delay(10000);
  ShowSerialData();
 
  Serial.println("AT+CIPSHUT");//close the connection
  delay(1000);
  ShowSerialData();
  delay(5000);

I was received from server this:

RDY

+CFUN: 1

+CPIN: READY

Call Ready

SMS Ready

AT+CSTT="internet"

OK
AT+CIICR

OK
AT+CIFSR

100.118.126.8
AT+CIPSPRT=0

OK
AT+CIPSTART="TCP","api.pushingbox.com","80"

OK

CONNECT OK
GET http://api.pushingbox.com/pushingbox?devid=v3094B979C1ECCD1HTTP/1.0 408 Request Time-out
Cache-Control: no-cache
Connect
CLOSED
AT+CIPSHUT

SHUT OK

What is the problem?
The request format is good?

Thanks your reply and help.