Diff: GSM.cpp

Revision:

10:24671d8aa0c9

Parent:

9:2f5445178940

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/GSM.cpp	Tue May 13 14:43:57 2014 +0000
@@ -0,0 +1,341 @@
+/*
+  GSM.cpp
+  2013 Copyright (c) Seeed Technology Inc.  All right reserved.
+
+  Author:lawliet.zou@gmail.com
+  2013-11-14
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+#include "GSM.h"
+
+int GSM::readBuffer(char *buffer,int count)
+{
+    int i = 0;
+    timeCnt.start();  // start timer
+    while(1) {
+        while (gprsSerial.readable()) {
+            char c = gprsSerial.getc();
+            if (c == '\r' || c == '\n') c = '$';
+            buffer[i++] = c;
+            if(i > count)break;
+        }
+        if(i > count)break;
+        if(timeCnt.read() > DEFAULT_TIMEOUT) {
+            timeCnt.stop();
+            timeCnt.reset();
+            break;
+        }
+    }
+    wait(0.5);
+    while(gprsSerial.readable()) {	// display the other thing..
+        char c = gprsSerial.getc();
+    }
+    return 0;
+}
+
+void cleanBuffer(char *buffer, int count)
+{
+    for(int i=0; i < count; i++) {
+        buffer[i] = '\0';
+    }
+}
+
+void GSM::sendCmd(char *cmd)
+{
+    gprsSerial.puts(cmd);
+}
+
+int GSM::waitForResp(char *resp, int timeout)
+{
+    int len = strlen(resp);
+    int sum=0;
+    timeCnt.start();
+
+    while(1) {
+        if(gprsSerial.readable()) {
+            char c = gprsSerial.getc();
+            sum = (c==resp[sum]) ? sum+1 : 0;
+            if(sum == len)break;
+        }
+        if(timeCnt.read() > timeout) {	// time out
+            timeCnt.stop();
+            timeCnt.reset();
+            return -1;
+        }
+    }
+    timeCnt.stop();                	// stop timer
+    timeCnt.reset();             		// clear timer
+    while(gprsSerial.readable()) {  	// display the other thing..
+        char c = gprsSerial.getc();
+    }
+
+    return 0;
+}
+
+int GSM::sendCmdAndWaitForResp(char *cmd, char *resp, int timeout)
+{
+    sendCmd(cmd);
+    return waitForResp(resp,timeout);
+}
+
+int GSM::powerCheck(void)
+{
+	return sendCmdAndWaitForResp("AT\r\n", "OK", 2);	
+}
+
+int GSM::init(void)
+{
+    for(int i = 0; i < 3; i++){
+    	sendCmdAndWaitForResp("AT\r\n", "OK", DEFAULT_TIMEOUT);
+    	wait(0.5);
+    }
+    if(0 != checkSIMStatus()) {
+        return -1;
+    }
+    if(checkSignalStrength()<1) {
+        return -1;
+    }
+    if(0 != settingSMS()) {
+        return -1;
+    }
+    return 0;
+}
+
+int GSM::checkSIMStatus(void)
+{
+    char gprsBuffer[30];
+    int count = 0;
+    cleanBuffer(gprsBuffer,30);
+    while(count < 3) {
+        sendCmd("AT+CPIN?\r\n");
+        readBuffer(gprsBuffer,30);
+        if((NULL != strstr(gprsBuffer,"+CPIN: READY"))) {
+            break;
+        }
+        count++;
+        wait(1);
+    }
+
+    if(count == 3) {
+        return -1;
+    }
+    return 0;
+}
+
+int GSM::checkSignalStrength(void)
+{
+    char gprsBuffer[100];
+    int index,count = 0;
+    cleanBuffer(gprsBuffer,100);
+    while(count < 3) {
+        sendCmd("AT+CSQ\r\n");
+        readBuffer(gprsBuffer,25);
+        if(sscanf(gprsBuffer, "AT+CSQ$$$$+CSQ: %d", &index)>0) {
+            break;
+        }
+        count++;
+        wait(1);
+    }
+    if(count == 3) {
+        return -1;
+    }
+    return index;
+}
+
+int GSM::settingSMS(void)
+{
+    if(0 != sendCmdAndWaitForResp("AT+CNMI=2,2\r\n", "OK", DEFAULT_TIMEOUT)) {
+        return -1;
+    }
+    if(0 != sendCmdAndWaitForResp("AT+CMGF=1\r\n", "OK", DEFAULT_TIMEOUT)) {
+        return -1;
+    }
+    return 0;
+}
+
+int GSM::sendSMS(char *number, char *data)
+{
+    char cmd[64];
+    while(gprsSerial.readable()) {
+        char c = gprsSerial.getc();
+    }
+    snprintf(cmd, sizeof(cmd),"AT+CMGS=\"%s\"\r\n",number);
+    if(0 != sendCmdAndWaitForResp(cmd,">",DEFAULT_TIMEOUT)) {
+        return -1;
+    }
+    wait(1);
+    gprsSerial.puts(data);
+    gprsSerial.putc((char)0x1a);
+    return 0;
+}
+
+int GSM::readSMS(char *message, int index)
+{
+    int i = 0;
+    char gprsBuffer[100];
+    char *p,*s;
+    gprsSerial.printf("AT+CMGR=%d\r\n",index);
+    cleanBuffer(gprsBuffer,100);
+    readBuffer(gprsBuffer,100);
+    if(NULL == ( s = strstr(gprsBuffer,"+CMGR"))) {
+        return -1;
+    }
+    if(NULL != ( s = strstr(gprsBuffer,"+32"))) {
+        p = s + 6;
+        while((*p != '$')&&(i < SMS_MAX_LENGTH-1)) {
+            message[i++] = *(p++);
+        }
+        message[i] = '\0';
+    }
+    return 0;
+}
+
+int GSM::deleteSMS(int index)
+{
+    char cmd[32];
+    snprintf(cmd,sizeof(cmd),"AT+CMGD=%d\r\n",index);
+    sendCmd(cmd);
+    return 0;
+}
+
+int GSM::getSMS(char* message)
+{
+    if(NULL != messageBuffer) {
+        strncpy(message,messageBuffer,SMS_MAX_LENGTH);
+    }
+    return 0;
+}
+
+int GSM::callUp(char *number)
+{
+    if(0 != sendCmdAndWaitForResp("AT+COLP=1\r\n","OK",5)) {
+        return -1;
+    }
+    wait(1);
+    gprsSerial.printf("\r\nATD%s;\r\n",NULL==number?phoneNumber:number);
+    return 0;
+}
+
+int GSM::answer(void)
+{
+    gprsSerial.printf("ATA\r\n");
+    return 0;
+}
+
+int GSM::loopHandle(void)
+{
+    char gprsBuffer[100];
+    int i;
+    char *s = NULL;
+    while(gprsSerial.readable()) {
+        char c = gprsSerial.getc();
+    }
+    wait(0.5);
+START:
+	cleanBuffer(gprsBuffer,100);
+	i = 0;
+    while(1) {
+        if(gprsSerial.readable()) {
+		    timeCnt.start();  // start timer
+		    while(1) {
+		        while (gprsSerial.readable()) {
+		            char c = gprsSerial.getc();
+		            if (c == '\r' || c == '\n') c = '$';
+		            gprsBuffer[i] = c;
+		            i++;
+		            if(i > 100) {
+		                i = 0;
+		                break;
+		            }
+		        }
+		        if(timeCnt.read() > 2) {          // time out
+		            timeCnt.stop();
+		            timeCnt.reset();
+		            break;
+		        }
+		    }
+            break;
+        }
+    }
+    if(NULL != strstr(gprsBuffer,"RING")) {
+        return MESSAGE_RING;
+    } else if(NULL != (s = strstr(gprsBuffer,"+CMT"))) { //SMS: $$+CMTI: "SM",24$$
+        if(NULL != (s = strstr(gprsBuffer,"+32"))) {
+            s += 6;
+            int i = 0;
+            cleanBuffer(messageBuffer,SMS_MAX_LENGTH);
+            while((*s != '$')&&(i < SMS_MAX_LENGTH-1)) {
+                messageBuffer[i++] = *(s++);
+            }
+            messageBuffer[i] = '\0';
+            return MESSAGE_SMS;
+        } else {
+            goto START;
+        }
+    } else {
+        goto START;
+    }
+}
+
+int GSM::networkInit(char* apn, char* userName, char* passWord)
+{
+    char cstt[64];
+    snprintf(cstt,sizeof(cstt),"AT+CSTT=\"%s\",\"%s\",\"%s\"\r\n",apn,userName,passWord);
+    if(0 != sendCmdAndWaitForResp(cstt, "OK", DEFAULT_TIMEOUT)) {
+        return -1;
+    }
+    return 0;
+}
+
+int GSM::connectTCP(char *ip, char *port)
+{
+    char cipstart[64];
+#if 0
+    if(0 != sendCmdAndWaitForResp("AT+CSTT=\"CMNET\",\"\",\"\"\r\n", "OK", 5)) {
+        return -1;
+    }
+#endif
+    sprintf(cipstart, "AT+CIPSTART=\"TCP\",\"%s\",\"%s\"\r\n", ip, port);
+    if(0 != sendCmdAndWaitForResp(cipstart, "OK", DEFAULT_TIMEOUT)) {
+        return -1;
+    }
+    return 0;
+}
+int GSM::sendTCPData(char *data)
+{
+    char cmd[64];
+    int len = strlen(data);
+    snprintf(cmd,sizeof(cmd),"AT+CIPSEND=%d\r\n",len);
+    if(0 != sendCmdAndWaitForResp(cmd,">",DEFAULT_TIMEOUT)) {
+        return -1;
+    }
+    if(0 != sendCmdAndWaitForResp(data,"OK",DEFAULT_TIMEOUT)) {
+        return -1;
+    }
+    return 0;
+}
+
+int GSM::closeTCP(void)
+{
+    sendCmd("AT+CIPCLOSE\r\n");
+    return 0;
+}
+
+int GSM::shutTCP(void)
+{
+    sendCmd("AT+CIPSHUT\r\n");
+    return 0;
+}