P542-Labs / GPRS

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Fork of GPRS by Seeed

gprs.cpp@3:48ee24a4b0f3, 2014-01-10 (annotated)

Committer:
lawliet
Date:
Fri Jan 10 05:59:36 2014 +0000
Revision:
3:48ee24a4b0f3
Parent:
2:16985da3a446
Child:
4:63a2619b423b
Version 1.3(fix some bugs)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lawliet 0:a5ae94727346 1 /*
lawliet 0:a5ae94727346 2 gprs.cpp
lawliet 0:a5ae94727346 3 2013 Copyright (c) Seeed Technology Inc. All right reserved.
lawliet 0:a5ae94727346 4
lawliet 0:a5ae94727346 5 Author:lawliet.zou@gmail.com
lawliet 0:a5ae94727346 6 2013-11-14
lawliet 0:a5ae94727346 7
lawliet 0:a5ae94727346 8 This library is free software; you can redistribute it and/or
lawliet 0:a5ae94727346 9 modify it under the terms of the GNU Lesser General Public
lawliet 0:a5ae94727346 10 License as published by the Free Software Foundation; either
lawliet 0:a5ae94727346 11 version 2.1 of the License, or (at your option) any later version.
lawliet 0:a5ae94727346 12
lawliet 0:a5ae94727346 13 This library is distributed in the hope that it will be useful,
lawliet 0:a5ae94727346 14 but WITHOUT ANY WARRANTY; without even the implied warranty of
lawliet 0:a5ae94727346 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
lawliet 0:a5ae94727346 16 Lesser General Public License for more details.
lawliet 0:a5ae94727346 17
lawliet 0:a5ae94727346 18 You should have received a copy of the GNU Lesser General Public
lawliet 0:a5ae94727346 19 License along with this library; if not, write to the Free Software
lawliet 0:a5ae94727346 20 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
lawliet 0:a5ae94727346 21 */
lawliet 0:a5ae94727346 22
lawliet 3:48ee24a4b0f3 23
lawliet 0:a5ae94727346 24 #include "gprs.h"
lawliet 0:a5ae94727346 25
lawliet 2:16985da3a446 26 int GPRS::init(void)
lawliet 0:a5ae94727346 27 {
lawliet 1:642a8dbe076c 28 wait(0.5);
lawliet 3:48ee24a4b0f3 29 sendCmd("AT+CFUN=1\r\n");
lawliet 3:48ee24a4b0f3 30 wait(1);
lawliet 1:642a8dbe076c 31 if(0 != checkSIMStatus()) { //check SIM card status
lawliet 1:642a8dbe076c 32 return -1;
lawliet 1:642a8dbe076c 33 }
lawliet 1:642a8dbe076c 34 if(checkSignalStrength()<1) { //check Signal Strength
lawliet 1:642a8dbe076c 35 return -1;
lawliet 1:642a8dbe076c 36 }
lawliet 1:642a8dbe076c 37 return 0;
lawliet 0:a5ae94727346 38 }
lawliet 0:a5ae94727346 39
lawliet 2:16985da3a446 40 int GPRS::readBuffer(char *buffer,int count)
lawliet 0:a5ae94727346 41 {
lawliet 1:642a8dbe076c 42 int i = 0;
lawliet 1:642a8dbe076c 43 timeCnt.start(); // start timer
lawliet 1:642a8dbe076c 44 while(1) {
lawliet 1:642a8dbe076c 45 while (gprsSerial.readable()) {
lawliet 1:642a8dbe076c 46 char c = gprsSerial.getc();
lawliet 1:642a8dbe076c 47 if (c == '\r' || c == '\n') c = '$';
lawliet 1:642a8dbe076c 48 buffer[i++] = c;
lawliet 1:642a8dbe076c 49 if(i > count)break;
lawliet 1:642a8dbe076c 50 }
lawliet 1:642a8dbe076c 51 if(i > count)break;
lawliet 3:48ee24a4b0f3 52 if(timeCnt.read() > DEFAULT_TIMEOUT) {
lawliet 1:642a8dbe076c 53 timeCnt.stop();
lawliet 1:642a8dbe076c 54 timeCnt.reset();
lawliet 1:642a8dbe076c 55 break;
lawliet 1:642a8dbe076c 56 }
lawliet 1:642a8dbe076c 57 }
lawliet 1:642a8dbe076c 58 wait(0.5);
lawliet 1:642a8dbe076c 59 while(gprsSerial.readable()) { // display the other thing..
lawliet 1:642a8dbe076c 60 char c = gprsSerial.getc();
lawliet 1:642a8dbe076c 61 }
lawliet 1:642a8dbe076c 62 return 0;
lawliet 0:a5ae94727346 63 }
lawliet 0:a5ae94727346 64
lawliet 0:a5ae94727346 65 void cleanBuffer(char *buffer, int count)
lawliet 0:a5ae94727346 66 {
lawliet 1:642a8dbe076c 67 for(int i=0; i < count; i++) {
lawliet 1:642a8dbe076c 68 buffer[i] = '\0';
lawliet 1:642a8dbe076c 69 }
lawliet 0:a5ae94727346 70 }
lawliet 0:a5ae94727346 71
lawliet 2:16985da3a446 72 void GPRS::sendCmd(char *cmd)
lawliet 0:a5ae94727346 73 {
lawliet 1:642a8dbe076c 74 gprsSerial.puts(cmd);
lawliet 0:a5ae94727346 75 }
lawliet 0:a5ae94727346 76
lawliet 2:16985da3a446 77 int GPRS::waitForResp(char *resp, int timeout)
lawliet 0:a5ae94727346 78 {
lawliet 1:642a8dbe076c 79 int len = strlen(resp);
lawliet 1:642a8dbe076c 80 int sum=0;
lawliet 1:642a8dbe076c 81 timeCnt.start();
lawliet 1:642a8dbe076c 82
lawliet 1:642a8dbe076c 83 while(1) {
lawliet 1:642a8dbe076c 84 if(gprsSerial.readable()) {
lawliet 1:642a8dbe076c 85 char c = gprsSerial.getc();
lawliet 1:642a8dbe076c 86 sum = (c==resp[sum]) ? sum+1 : 0;
lawliet 1:642a8dbe076c 87 if(sum == len)break;
lawliet 1:642a8dbe076c 88 }
lawliet 1:642a8dbe076c 89 if(timeCnt.read() > timeout) { // time out
lawliet 1:642a8dbe076c 90 timeCnt.stop();
lawliet 1:642a8dbe076c 91 timeCnt.reset();
lawliet 1:642a8dbe076c 92 return -1;
lawliet 1:642a8dbe076c 93 }
lawliet 1:642a8dbe076c 94 }
lawliet 1:642a8dbe076c 95 timeCnt.stop(); // stop timer
lawliet 1:642a8dbe076c 96 timeCnt.reset(); // clear timer
lawliet 1:642a8dbe076c 97 while(gprsSerial.readable()) { // display the other thing..
lawliet 1:642a8dbe076c 98 char c = gprsSerial.getc();
lawliet 1:642a8dbe076c 99 }
lawliet 1:642a8dbe076c 100
lawliet 1:642a8dbe076c 101 return 0;
lawliet 1:642a8dbe076c 102 }
lawliet 0:a5ae94727346 103
lawliet 0:a5ae94727346 104
lawliet 0:a5ae94727346 105
lawliet 2:16985da3a446 106 int GPRS::sendCmdAndWaitForResp(char *cmd, char *resp, int timeout)
lawliet 0:a5ae94727346 107 {
lawliet 0:a5ae94727346 108 sendCmd(cmd);
lawliet 1:642a8dbe076c 109 return waitForResp(resp,timeout);
lawliet 0:a5ae94727346 110 }
lawliet 0:a5ae94727346 111
lawliet 2:16985da3a446 112 int GPRS::checkSIMStatus(void)
lawliet 0:a5ae94727346 113 {
lawliet 1:642a8dbe076c 114 char gprsBuffer[30];
lawliet 1:642a8dbe076c 115 int count = 0;
lawliet 1:642a8dbe076c 116 cleanBuffer(gprsBuffer,30);
lawliet 1:642a8dbe076c 117 while(count < 3) {
lawliet 1:642a8dbe076c 118 sendCmd("AT+CPIN?\r\n");
lawliet 1:642a8dbe076c 119 readBuffer(gprsBuffer,30);
lawliet 1:642a8dbe076c 120 if((NULL != strstr(gprsBuffer,"+CPIN: READY"))) {
lawliet 1:642a8dbe076c 121 break;
lawliet 1:642a8dbe076c 122 }
lawliet 1:642a8dbe076c 123 count++;
lawliet 1:642a8dbe076c 124 wait(1);
lawliet 1:642a8dbe076c 125 }
lawliet 0:a5ae94727346 126
lawliet 1:642a8dbe076c 127 if(count == 3) {
lawliet 1:642a8dbe076c 128 return -1;
lawliet 1:642a8dbe076c 129 }
lawliet 1:642a8dbe076c 130 return 0;
lawliet 0:a5ae94727346 131 }
lawliet 0:a5ae94727346 132
lawliet 2:16985da3a446 133 int GPRS::checkSignalStrength(void)
lawliet 0:a5ae94727346 134 {
lawliet 1:642a8dbe076c 135 char gprsBuffer[100];
lawliet 1:642a8dbe076c 136 int index,count = 0;
lawliet 1:642a8dbe076c 137 cleanBuffer(gprsBuffer,100);
lawliet 1:642a8dbe076c 138 while(count < 3) {
lawliet 1:642a8dbe076c 139 sendCmd("AT+CSQ\r\n");
lawliet 1:642a8dbe076c 140 readBuffer(gprsBuffer,25);
lawliet 1:642a8dbe076c 141 if(sscanf(gprsBuffer, "AT+CSQ$$$$+CSQ: %d", &index)>0) {
lawliet 1:642a8dbe076c 142 break;
lawliet 1:642a8dbe076c 143 }
lawliet 1:642a8dbe076c 144 count++;
lawliet 1:642a8dbe076c 145 wait(1);
lawliet 1:642a8dbe076c 146 }
lawliet 1:642a8dbe076c 147 if(count == 3) {
lawliet 1:642a8dbe076c 148 return -1;
lawliet 1:642a8dbe076c 149 }
lawliet 1:642a8dbe076c 150 return index;
lawliet 0:a5ae94727346 151 }
lawliet 0:a5ae94727346 152
lawliet 2:16985da3a446 153 int GPRS::sendSMS(char *number, char *data)
lawliet 0:a5ae94727346 154 {
lawliet 1:642a8dbe076c 155 char cmd[64];
lawliet 3:48ee24a4b0f3 156 if(0 != sendCmdAndWaitForResp("AT+CMGF=1\r\n", "OK", DEFAULT_TIMEOUT)) { // Set message mode to ASCII
lawliet 1:642a8dbe076c 157 return -1;
lawliet 1:642a8dbe076c 158 }
lawliet 1:642a8dbe076c 159 wait(0.5);
lawliet 1:642a8dbe076c 160 // Set the phone number
lawliet 1:642a8dbe076c 161 snprintf(cmd, sizeof(cmd),"AT+CMGS=\"%s\"\r\n", number);
lawliet 3:48ee24a4b0f3 162 if(0 != sendCmdAndWaitForResp(cmd,">",DEFAULT_TIMEOUT)) {
lawliet 1:642a8dbe076c 163 return -1;
lawliet 1:642a8dbe076c 164 }
lawliet 1:642a8dbe076c 165 wait(1);
lawliet 1:642a8dbe076c 166 gprsSerial.puts(data);// Send Message
lawliet 1:642a8dbe076c 167 wait(0.5);
lawliet 1:642a8dbe076c 168 gprsSerial.putc(0x1A);//end mark
lawliet 1:642a8dbe076c 169 return 0;
lawliet 0:a5ae94727346 170 }
lawliet 0:a5ae94727346 171
lawliet 2:16985da3a446 172 int GPRS::readSMS(char *buffer, char *message, bool check)
lawliet 0:a5ae94727346 173 {
lawliet 1:642a8dbe076c 174 int index,i = 0;
lawliet 1:642a8dbe076c 175 char gprsBuffer[100];
lawliet 1:642a8dbe076c 176 char *p,*s;
lawliet 0:a5ae94727346 177
lawliet 1:642a8dbe076c 178 if(sscanf(buffer, "$$+CMTI: \"SM\",%d", &index)>0) {
lawliet 1:642a8dbe076c 179 gprsSerial.printf("AT+CMGR=%d\r\n", index);
lawliet 1:642a8dbe076c 180 } else {
lawliet 3:48ee24a4b0f3 181 return -1;
lawliet 1:642a8dbe076c 182 }
lawliet 1:642a8dbe076c 183 cleanBuffer(gprsBuffer,100);
lawliet 1:642a8dbe076c 184 readBuffer(gprsBuffer,100);
lawliet 1:642a8dbe076c 185 if(NULL == ( s = strstr(gprsBuffer,"+CMGR: \"REC UNREAD\""))) {
lawliet 1:642a8dbe076c 186 return -1;
lawliet 1:642a8dbe076c 187 }
lawliet 1:642a8dbe076c 188
lawliet 1:642a8dbe076c 189 //check phone number
lawliet 1:642a8dbe076c 190 if(check) {
lawliet 1:642a8dbe076c 191 char number[20];
lawliet 1:642a8dbe076c 192 snprintf(number,sizeof(number),"\"+86%s\"",phoneNumber); //for China
lawliet 1:642a8dbe076c 193 p = s + 20;
lawliet 1:642a8dbe076c 194 if(0 != (strncmp(number,p,14))) {
lawliet 1:642a8dbe076c 195 return -1;
lawliet 1:642a8dbe076c 196 }
lawliet 1:642a8dbe076c 197 }
lawliet 1:642a8dbe076c 198 p = s + 64;
lawliet 1:642a8dbe076c 199 while(*p != '$') {
lawliet 1:642a8dbe076c 200 message[i++] = *(p++);
lawliet 1:642a8dbe076c 201 }
lawliet 1:642a8dbe076c 202 message[i] = '\0';
lawliet 1:642a8dbe076c 203 return 0;
lawliet 0:a5ae94727346 204 }
lawliet 0:a5ae94727346 205
lawliet 2:16985da3a446 206 int GPRS::deleteSMS(int index)
lawliet 0:a5ae94727346 207 {
lawliet 1:642a8dbe076c 208 char cmd[64];
lawliet 1:642a8dbe076c 209 snprintf(cmd,sizeof(cmd),"AT+CMGD=%d\r\n",index);
lawliet 1:642a8dbe076c 210 sendCmd(cmd);
lawliet 1:642a8dbe076c 211 return 0;
lawliet 0:a5ae94727346 212 }
lawliet 0:a5ae94727346 213
lawliet 2:16985da3a446 214 int GPRS::callUp(char *number)
lawliet 0:a5ae94727346 215 {
lawliet 1:642a8dbe076c 216 if(0 != sendCmdAndWaitForResp("AT+COLP=1\r\n","OK",5)) {
lawliet 1:642a8dbe076c 217 return -1;
lawliet 1:642a8dbe076c 218 }
lawliet 1:642a8dbe076c 219 wait(1);
lawliet 1:642a8dbe076c 220 gprsSerial.printf("\r\nATD%s;\r\n",NULL==number?phoneNumber:number);
lawliet 1:642a8dbe076c 221 return 0;
lawliet 0:a5ae94727346 222 }
lawliet 0:a5ae94727346 223
lawliet 2:16985da3a446 224 int GPRS::answer(void)
lawliet 0:a5ae94727346 225 {
lawliet 1:642a8dbe076c 226 gprsSerial.printf("ATA\r\n");
lawliet 1:642a8dbe076c 227 return 0;
lawliet 0:a5ae94727346 228 }
lawliet 0:a5ae94727346 229
lawliet 2:16985da3a446 230 int GPRS::loop(bool check)
lawliet 0:a5ae94727346 231 {
lawliet 1:642a8dbe076c 232 char gprsBuffer[100];
lawliet 1:642a8dbe076c 233 int i = 0;
lawliet 1:642a8dbe076c 234 cleanBuffer(gprsBuffer,100);
lawliet 1:642a8dbe076c 235 while(1) {
lawliet 1:642a8dbe076c 236 if(gprsSerial.readable()) {
lawliet 1:642a8dbe076c 237 break;
lawliet 1:642a8dbe076c 238 }
lawliet 1:642a8dbe076c 239 wait(1);
lawliet 1:642a8dbe076c 240 }
lawliet 1:642a8dbe076c 241
lawliet 1:642a8dbe076c 242 timeCnt.start(); // start timer
lawliet 1:642a8dbe076c 243 while(1) {
lawliet 1:642a8dbe076c 244 while (gprsSerial.readable()) {
lawliet 1:642a8dbe076c 245 char c = gprsSerial.getc();
lawliet 1:642a8dbe076c 246 if (c == '\r' || c == '\n') c = '$';
lawliet 1:642a8dbe076c 247 gprsBuffer[i] = c;
lawliet 1:642a8dbe076c 248 i++;
lawliet 1:642a8dbe076c 249 if(i > 100) {
lawliet 1:642a8dbe076c 250 i = 0;
lawliet 1:642a8dbe076c 251 break;
lawliet 1:642a8dbe076c 252 }
lawliet 1:642a8dbe076c 253 }
lawliet 1:642a8dbe076c 254 if(timeCnt.read() > 5) { // time out
lawliet 1:642a8dbe076c 255 timeCnt.stop();
lawliet 1:642a8dbe076c 256 timeCnt.reset();
lawliet 1:642a8dbe076c 257 break;
lawliet 1:642a8dbe076c 258 }
lawliet 1:642a8dbe076c 259 }
lawliet 1:642a8dbe076c 260
lawliet 1:642a8dbe076c 261 if(NULL != strstr(gprsBuffer,"RING")) {
lawliet 1:642a8dbe076c 262 if(0 != answer()) {
lawliet 1:642a8dbe076c 263 }
lawliet 1:642a8dbe076c 264 } else if(NULL != strstr(gprsBuffer,"$$+CMTI: \"SM\"")) { //SMS: $$+CMTI: "SM",24$$
lawliet 1:642a8dbe076c 265 char message[64];
lawliet 1:642a8dbe076c 266 if(0 != readSMS(gprsBuffer, message, check)) {
lawliet 1:642a8dbe076c 267 }
lawliet 1:642a8dbe076c 268 }
lawliet 1:642a8dbe076c 269 return 0;
lawliet 0:a5ae94727346 270 }
lawliet 0:a5ae94727346 271
lawliet 0:a5ae94727346 272
lawliet 0:a5ae94727346 273 /****************************************GPRS TCP CONNECT************************************/
lawliet 0:a5ae94727346 274
lawliet 2:16985da3a446 275 int GPRS::connectTCP(char *ip, char *port)
lawliet 0:a5ae94727346 276 {
lawliet 1:642a8dbe076c 277 char cipstart[50];
lawliet 3:48ee24a4b0f3 278 if(0 != sendCmdAndWaitForResp("AT+CSTT=\"CMNET\",\"\",\"\"\r\n", "OK", 5)) {
lawliet 1:642a8dbe076c 279 return -1;
lawliet 1:642a8dbe076c 280 }
lawliet 1:642a8dbe076c 281 sprintf(cipstart, "AT+CIPSTART=\"TCP\",\"%s\",\"%s\"\r\n", ip, port);
lawliet 3:48ee24a4b0f3 282 if(0 != sendCmdAndWaitForResp(cipstart, "OK", 5)) {
lawliet 1:642a8dbe076c 283 return -1;
lawliet 1:642a8dbe076c 284 }
lawliet 1:642a8dbe076c 285 return 0;
lawliet 0:a5ae94727346 286 }
lawliet 2:16985da3a446 287 int GPRS::sendTCPData(char *data)
lawliet 0:a5ae94727346 288 {
lawliet 1:642a8dbe076c 289 char cmd[64];
lawliet 1:642a8dbe076c 290 int len = strlen(data);
lawliet 1:642a8dbe076c 291 snprintf(cmd,sizeof(cmd),"AT+CIPSEND=%d\r\n",len);
lawliet 3:48ee24a4b0f3 292 if(0 != sendCmdAndWaitForResp(cmd,">",DEFAULT_TIMEOUT)) {
lawliet 1:642a8dbe076c 293 return -1;
lawliet 1:642a8dbe076c 294 }
lawliet 3:48ee24a4b0f3 295 if(0 != sendCmdAndWaitForResp(data,"OK",DEFAULT_TIMEOUT)) {
lawliet 1:642a8dbe076c 296 return -1;
lawliet 1:642a8dbe076c 297 }
lawliet 1:642a8dbe076c 298 return 0;
lawliet 0:a5ae94727346 299 }
lawliet 0:a5ae94727346 300
lawliet 2:16985da3a446 301 int GPRS::closeTCP(void)
lawliet 0:a5ae94727346 302 {
lawliet 1:642a8dbe076c 303 sendCmd("AT+CIPCLOSE\r\n");
lawliet 1:642a8dbe076c 304 return 0;
lawliet 0:a5ae94727346 305 }
lawliet 0:a5ae94727346 306
lawliet 2:16985da3a446 307 int GPRS::shutTCP(void)
lawliet 0:a5ae94727346 308 {
lawliet 1:642a8dbe076c 309 sendCmd("AT+CIPSHUT\r\n");
lawliet 1:642a8dbe076c 310 return 0;
lawliet 0:a5ae94727346 311 }
lawliet 0:a5ae94727346 312
lawliet 0:a5ae94727346 313 /****************************************GPRS DEBUG******************************************/
lawliet 2:16985da3a446 314 void GPRS::serialDebug(PinName tx, PinName rx)
lawliet 1:642a8dbe076c 315 {
lawliet 1:642a8dbe076c 316 char buffer[64];
lawliet 1:642a8dbe076c 317 int count = 0;
lawliet 1:642a8dbe076c 318 Serial pc(tx,rx);
lawliet 1:642a8dbe076c 319 while(1) {
lawliet 1:642a8dbe076c 320 if(gprsSerial.readable()) {
lawliet 1:642a8dbe076c 321 while(gprsSerial.readable()) {
lawliet 1:642a8dbe076c 322 char c = gprsSerial.getc();
lawliet 1:642a8dbe076c 323 buffer[count++] = c;
lawliet 1:642a8dbe076c 324 if(count == 64) break;
lawliet 1:642a8dbe076c 325 }
lawliet 1:642a8dbe076c 326 pc.puts(buffer);
lawliet 1:642a8dbe076c 327 for(int i = 0; i < count; i++) {
lawliet 1:642a8dbe076c 328 buffer[i] = NULL;
lawliet 1:642a8dbe076c 329 }
lawliet 1:642a8dbe076c 330 count = 0;
lawliet 1:642a8dbe076c 331 }
lawliet 0:a5ae94727346 332
lawliet 1:642a8dbe076c 333 if(pc.readable()) {
lawliet 1:642a8dbe076c 334 gprsSerial.putc(pc.getc());
lawliet 1:642a8dbe076c 335 }
lawliet 1:642a8dbe076c 336 }
lawliet 0:a5ae94727346 337 }