arduino กับ ตัว Sim900 ใช้ Lib SIM900.h

คำสั่ง gsm.SimpleWriteln มันไม่รันขึ้นอะครับ

โค้ดที่ผมใช้ครับ

#include "SIM900.h"

#include <SoftwareSerial.h>

//SoftwareSerial gsm(3,2); //Rx,Tx

double humidity=10,temperature=20;

void setup() {

  Serial.begin(9600);

  Serial.println("GSM Shield running.");

  if (gsm.begin(9600)) Serial.println("\nstatus=READY");

  else Serial.println("\nstatus=IDLE");

  http();

}

void loop() {

}

void http()

{

  Serial.println("SIGNAL QUALITY");

  gsm.SimpleWriteln("AT+CSQ");

  delay(1000);

  gsm.SimpleWriteln("AT+CGATT?"); 

  delay(1000);

  gsm.SimpleWriteln("AT+SAPBR=3,1,\"CONTYPE\",\"GPRS\"");

  delay(1000);

  Serial.println("connect");

  gsm.SimpleWriteln("AT+SAPBR=3,1,\"APN\",\"internet\"");

  delay(1000);

  gsm.SimpleWriteln("AT+SAPBR=1,1");

  delay(1000);

  gsm.SimpleWriteln("AT+SAPBR=2,1");

  delay(1000);

  gsm.SimpleWriteln("AT+HTTPINIT"); ///

  delay(1000);

  gsm.SimpleWriteln("AT+HTTPPARA=\"CID\",1");

  delay(1000);

  Serial.println("Add Here");

  gsm.SimpleWriteln("AT+HTTPPARA=\"URL\",\"http://___.___.___.___/testProject1/test1.php?);

  gsm.SimpleWrite("humidity=90");

  gsm.SimpleWrite(humidity);

  gsm.SimpleWrite("&temperature=80");

  gsm.SimpleWrite(temperature);*/

  gsm.SimpleWriteln("\"");

  delay(5000);

  gsm.SimpleWriteln("AT+HTTPACTION=0");

  delay(15000);

  gsm.SimpleWriteln("AT+HTTPTERM");

  delay(1000);

  gsm.SimpleWriteln("AT+SAPBR=0,1");

  delay(1000);

}