diff --git a/DTE.h b/DTE.h
index e5fd453..3dc876e 100644
--- a/DTE.h
+++ b/DTE.h
@@ -56,6 +56,31 @@ public:
 		tick = millis();
 		proccess();
 	}
+
+	void SendCommand(const __FlashStringHelper* command, unsigned long timeout, const char* response1, const char* response2 = 0, const char* response3 = 0)
+	{
+//		char cmd[32];
+
+		match = 0;
+		result = EXPECT_BUSY;
+		response[0] = response1;
+		response[1] = response2;
+		response[2] = response3;
+		this->timeout = timeout;
+		// clear rx buffer
+		while (stream.available())
+		{
+			stream.read();
+		}
+		// send command
+//		strcpy_P(cmd, command);
+		stream.print((const __FlashStringHelper *)command);
+//		stream.print(cmd);
+		buffer = "";
+		tick = millis();
+		proccess();
+	}
+
 	void Delay(unsigned long delay)
 	{
 		timeout = delay;
diff --git a/ThreadedGSM.h b/ThreadedGSM.h
index ab35afe..76e1add 100644
--- a/ThreadedGSM.h
+++ b/ThreadedGSM.h
@@ -340,14 +340,14 @@ private:
 			case STARTUP_DELAY:
 				if(millis() - tick >= THREADEDGSM_STARTUP_DELAY)
 				{
-					dte.SendCommand("AT\r", THREADEDGSM_AT_TIMEOUT, "OK\r");
+					dte.SendCommand(F("AT\r"), THREADEDGSM_AT_TIMEOUT, "OK\r");
 					state = STARTUP_ENTER_AT;
 				}
 				break;
 			case STARTUP_ENTER_AT:
 				if(dte.getResult() ==  DTE::EXPECT_RESULT)
 				{
-					dte.SendCommand("AT+CPIN?\r", 10000, "OK\r");
+					dte.SendCommand(F("AT+CPIN?\r"), 10000, "OK\r");
 					state = STARTUP_CHK_CPIN;
 				}
 				else
@@ -360,7 +360,7 @@ private:
 				{
 					if(dte.getBuffer().indexOf(F("+CPIN: READY")) != -1)
 					{
-						dte.SendCommand("AT+CREG?\r", THREADEDGSM_AT_TIMEOUT, "OK\r");
+						dte.SendCommand(F("AT+CREG?\r"), THREADEDGSM_AT_TIMEOUT, "OK\r");
 						state = STARTUP_CHK_CREG;
 					}else
 					{
@@ -374,7 +374,7 @@ private:
 				{
 					if((dte.getBuffer().indexOf(F(",1")) >= 0) || (dte.getBuffer().indexOf(F(",5")) >= 0))
 					{
-						dte.SendCommand("AT+CLTS=1\r", THREADEDGSM_AT_TIMEOUT, "OK\r");
+						dte.SendCommand(F("AT+CLTS=1\r"), THREADEDGSM_AT_TIMEOUT, "OK\r");
 						state = STARTUP_CHK_CLTS;
 					}else
 						state = STARTUP_POWER_OFF;
@@ -384,7 +384,7 @@ private:
 			case STARTUP_CHK_CLTS:
 				if(dte.getResult() == DTE::EXPECT_RESULT)
 				{
-					dte.SendCommand("AT+CENG=3\r", THREADEDGSM_AT_TIMEOUT, "OK\r");
+					dte.SendCommand(F("AT+CENG=3\r"), THREADEDGSM_AT_TIMEOUT, "OK\r");
 					state = STARTUP_CHK_CENG;
 				}else
 					state = STARTUP_POWER_OFF;
@@ -417,7 +417,7 @@ private:
 		switch(state)
 		{
 			case CLOCK_REQ:
-				dte.SendCommand("AT+CCLK?\r", THREADEDGSM_AT_TIMEOUT, "OK\r");
+				dte.SendCommand(F("AT+CCLK?\r"), THREADEDGSM_AT_TIMEOUT, "OK\r");
 				state = CLOCK_VERIFY;
 				break;
 			case CLOCK_VERIFY:
@@ -465,7 +465,7 @@ private:
 		switch(state)
 		{
 			case SIGNAL_REQ:
-				dte.SendCommand("AT+CSQ\r", THREADEDGSM_AT_TIMEOUT, "OK\r");
+				dte.SendCommand(F("AT+CSQ\r"), THREADEDGSM_AT_TIMEOUT, "OK\r");
 				state = SIGNAL_VERIFY;
 				break;
 			case SIGNAL_VERIFY:
@@ -499,7 +499,7 @@ private:
 		switch(state)
 		{
 			case BATTERY_REQ:
-				dte.SendCommand("AT+CBC\r", THREADEDGSM_AT_TIMEOUT, "OK\r");
+				dte.SendCommand(F("AT+CBC\r"), THREADEDGSM_AT_TIMEOUT, "OK\r");
 				state = BATTERY_VERIFY;
 				break;
 			case BATTERY_VERIFY:
@@ -541,13 +541,13 @@ private:
 			case READ_REQ:
 				SMSi.Text = "";
 				SMSi.Number = "";
-				dte.SendCommand("AT+CMGF=0\r", THREADEDGSM_AT_TIMEOUT, "OK\r"); // SMS Message format set as PDU
+				dte.SendCommand(F("AT+CMGF=0\r"), THREADEDGSM_AT_TIMEOUT, "OK\r"); // SMS Message format set as PDU
 				state = READ_CHK_CMGF;
 				break;
 			case READ_CHK_CMGF:
 				if(dte.getResult() == DTE::EXPECT_RESULT)
 				{
-					dte.SendCommand("AT+CPMS=\"SM\"\r", THREADEDGSM_AT_TIMEOUT, "OK\r"); // SIM Message storage
+					dte.SendCommand(F("AT+CPMS=\"SM\"\r"), THREADEDGSM_AT_TIMEOUT, "OK\r"); // SIM Message storage
 					state = READ_CHK_CPMS;
 				}
 				else clearReq(REQ_INBOX);
@@ -584,7 +584,7 @@ private:
 				break;
 
 			case READ_DELAY_CLEAR_BUFF:
-				dte.SendCommand("AT+CMGF=1\r", THREADEDGSM_AT_TIMEOUT, "OK\r"); // SMS Message format set as TEXT
+				dte.SendCommand(F("AT+CMGF=1\r"), THREADEDGSM_AT_TIMEOUT, "OK\r"); // SMS Message format set as TEXT
 				state = READ_TEXT_CMGR;
 				break;
 
@@ -657,7 +657,7 @@ private:
 		switch(state)
 		{
 			case SEND_REQ:
-				dte.SendCommand("AT+CMGF=1\r", THREADEDGSM_AT_TIMEOUT, "OK\r"); // SMS Text mode
+				dte.SendCommand(F("AT+CMGF=1\r"), THREADEDGSM_AT_TIMEOUT, "OK\r"); // SMS Text mode
 				state = SEND_CHK_CMGF;
 				break;