Sam Clarke / Mbed 2 deprecated GPS-GPRS_Tracker

An SMS based GPS tracker using the Adafruit Ultimate GPS module http://www.adafruit.com/products/746 and the Seeed Studio GPRS shield (Sim900 chipset) http://www.seeedstudio.com/depot/gprs-shield-p-779.html?cPath=132_134

Dependencies:   GPS MODSERIAL mbed-rtos mbed

SMS based GPS tracker

This is an SMS based GPS tracker using using the Adafruit Ultimate GPS module and the Seeed studio GPRS arduino shield [SIM900 chipset]. The idea of this project is to leverage the free SMS between Virgin mobile prepaid SIM cards in Australia for long distance communication.

Currently the GPRS shield is switched on manually, and should be done about 10 seconds before powering the mbed/GPS in order to disable echo properly during start up. This could easily be fixed by switching the GPRS shield with the mbed at start up, waiting the 10 seconds, set the echo then flush the buffer.

The mbed can read all 160 ASCII chars sent in a message for control.

http://i47.tinypic.com/35alpue.png http://i48.tinypic.com/2mi3y0z.png http://i45.tinypic.com/jkeyvt.png

The Seeed GPRS shield http://www.seeedstudio.com/depot/gprs-shield-p-779.html?cPath=132_134

The Adafruit Ultimate GPS http://www.adafruit.com/products/746

main.cpp@0:5b4bcbd69509, 2012-10-06 (annotated)

Committer:
SamClarke
Date:
Sat Oct 06 22:47:34 2012 +0000
Revision:
0:5b4bcbd69509
Child:
1:00c7dc0c1761
Basic Prototype

Who changed what in which revision?

UserRevisionLine numberNew contents of line
SamClarke 0:5b4bcbd69509 1 #include "mbed.h"
SamClarke 0:5b4bcbd69509 2 #include "GPS.h"
SamClarke 0:5b4bcbd69509 3 #include "rtos.h"
SamClarke 0:5b4bcbd69509 4 #include "MODSERIAL.h"
SamClarke 0:5b4bcbd69509 5 #include <string>
SamClarke 0:5b4bcbd69509 6 #include <iostream>
SamClarke 0:5b4bcbd69509 7
SamClarke 0:5b4bcbd69509 8 using namespace std;
SamClarke 0:5b4bcbd69509 9
SamClarke 0:5b4bcbd69509 10 const string GoogleChunk = "https://maps.google.com.au/maps?q=";
SamClarke 0:5b4bcbd69509 11 const string GoogleExtras = "&z=20";
SamClarke 0:5b4bcbd69509 12 char GPRSbuffer[512];
SamClarke 0:5b4bcbd69509 13 int index;
SamClarke 0:5b4bcbd69509 14 int i = 0;
SamClarke 0:5b4bcbd69509 15
SamClarke 0:5b4bcbd69509 16 GPS gps(p9,p10);
SamClarke 0:5b4bcbd69509 17 MODSERIAL GPRS(p13,p14); // MODSERIAL for rxBufferFlush()
SamClarke 0:5b4bcbd69509 18 MODSERIAL pc(USBTX,USBRX);
SamClarke 0:5b4bcbd69509 19
SamClarke 0:5b4bcbd69509 20 DigitalOut myled1(LED1);
SamClarke 0:5b4bcbd69509 21 DigitalOut myled2(LED2);
SamClarke 0:5b4bcbd69509 22 DigitalOut myled3(LED3);
SamClarke 0:5b4bcbd69509 23 DigitalOut myled4(LED4);
SamClarke 0:5b4bcbd69509 24
SamClarke 0:5b4bcbd69509 25 void led_thread(void const *argument) // Some light jazz in a thread
SamClarke 0:5b4bcbd69509 26 {
SamClarke 0:5b4bcbd69509 27 while (true) {
SamClarke 0:5b4bcbd69509 28 DigitalOut leds[4] = {myled1, myled2, myled3, myled4};
SamClarke 0:5b4bcbd69509 29 int pattern[6][4] = {{1,0,0,0},{0,1,0,0},{0,0,1,0},{0,0,0,1},{0,0,1,0},{0,1,0,0}};
SamClarke 0:5b4bcbd69509 30 int i=0;
SamClarke 0:5b4bcbd69509 31 while(1) {
SamClarke 0:5b4bcbd69509 32 leds[0] = pattern[i][0];
SamClarke 0:5b4bcbd69509 33 leds[1] = pattern[i][1];
SamClarke 0:5b4bcbd69509 34 leds[2] = pattern[i][2];
SamClarke 0:5b4bcbd69509 35 leds[3] = pattern[i][3];
SamClarke 0:5b4bcbd69509 36 wait(0.2);
SamClarke 0:5b4bcbd69509 37 i++;
SamClarke 0:5b4bcbd69509 38 i == 6? i=0:0;
SamClarke 0:5b4bcbd69509 39 }
SamClarke 0:5b4bcbd69509 40 }
SamClarke 0:5b4bcbd69509 41 }
SamClarke 0:5b4bcbd69509 42
SamClarke 0:5b4bcbd69509 43 void sendSms()
SamClarke 0:5b4bcbd69509 44 {
SamClarke 0:5b4bcbd69509 45 // Set message mode to ASCII
SamClarke 0:5b4bcbd69509 46 GPRS.printf("AT+CMGF=1\r\n");
SamClarke 0:5b4bcbd69509 47 wait(1);
SamClarke 0:5b4bcbd69509 48 // Set the phone number
SamClarke 0:5b4bcbd69509 49 GPRS.printf("AT+CMGS=\"+614<<NUMBER>>\"\r\n");
SamClarke 0:5b4bcbd69509 50 wait(1);
SamClarke 0:5b4bcbd69509 51 // Write out the GPS data in a message
SamClarke 0:5b4bcbd69509 52 GPRS.printf("Time: %4.2f \nAltitude: %3.2fm\nSpeed: %3.2f Kn\nHeading: %3.2f Deg\nValidity: %c\nFix: %s\nSatellites: %d", gps.time, gps.altitude, gps.speed, gps.heading,gps.validity,gps.fixtype,gps.satellites);
SamClarke 0:5b4bcbd69509 53 wait(1);
SamClarke 0:5b4bcbd69509 54 // Send it...
SamClarke 0:5b4bcbd69509 55 GPRS.putc(0x1A);
SamClarke 0:5b4bcbd69509 56 wait(3);
SamClarke 0:5b4bcbd69509 57 GPRS.printf("AT+CMGF=1\r\n");
SamClarke 0:5b4bcbd69509 58 wait(1);
SamClarke 0:5b4bcbd69509 59 GPRS.printf("AT+CMGS=\"+614<<NUMBER>>\"\r\n");
SamClarke 0:5b4bcbd69509 60 wait(1);
SamClarke 0:5b4bcbd69509 61 GPRS.printf("Find me at....\n %s%f,%f%s", GoogleChunk, gps.latitude, gps.longitude, GoogleExtras);
SamClarke 0:5b4bcbd69509 62 wait(1);
SamClarke 0:5b4bcbd69509 63 GPRS.putc(0x1A);
SamClarke 0:5b4bcbd69509 64 }
SamClarke 0:5b4bcbd69509 65
SamClarke 0:5b4bcbd69509 66 void parseSms()
SamClarke 0:5b4bcbd69509 67 {
SamClarke 0:5b4bcbd69509 68 // If theres a char waiting in the MODSERIAL buffer
SamClarke 0:5b4bcbd69509 69 while (GPRS.readable()) {
SamClarke 0:5b4bcbd69509 70 // Assign it to 'c'
SamClarke 0:5b4bcbd69509 71 char c = GPRS.getc();
SamClarke 0:5b4bcbd69509 72 // Replace all returns and or line endings with money!
SamClarke 0:5b4bcbd69509 73 if (c == '\r' || c == '\n') c = '$';
SamClarke 0:5b4bcbd69509 74 // Put it in the array
SamClarke 0:5b4bcbd69509 75 GPRSbuffer[i] = c;
SamClarke 0:5b4bcbd69509 76 // Repeat if possible
SamClarke 0:5b4bcbd69509 77 i++;
SamClarke 0:5b4bcbd69509 78 }
SamClarke 0:5b4bcbd69509 79 // Uncomment the following to debug
SamClarke 0:5b4bcbd69509 80
SamClarke 0:5b4bcbd69509 81 //pc.printf("buffer = %s", GPRSbuffer);
SamClarke 0:5b4bcbd69509 82 //pc.printf("index = %d", index);
SamClarke 0:5b4bcbd69509 83
SamClarke 0:5b4bcbd69509 84 // If we get an SMS notification....
SamClarke 0:5b4bcbd69509 85 if (sscanf(GPRSbuffer, "$$+CMTI: \"SM\",%d", &index)>0) {
SamClarke 0:5b4bcbd69509 86 // Do the send SMS routine...
SamClarke 0:5b4bcbd69509 87 sendSms();
SamClarke 0:5b4bcbd69509 88 // Wait for the cascade of \r\nOK\r\n\r\nOK\r\n's from the SMS's to finish
SamClarke 0:5b4bcbd69509 89 wait(4);
SamClarke 0:5b4bcbd69509 90 // Flush out any left in the serial buffer
SamClarke 0:5b4bcbd69509 91 GPRS.rxBufferFlush();
SamClarke 0:5b4bcbd69509 92 // Reset the GPRS buffer
SamClarke 0:5b4bcbd69509 93 memset(GPRSbuffer, '0', 512);
SamClarke 0:5b4bcbd69509 94 // Reset the char counter
SamClarke 0:5b4bcbd69509 95 i = 0;
SamClarke 0:5b4bcbd69509 96 } else pc.printf("\nWaiting for SMS...\n");
SamClarke 0:5b4bcbd69509 97 }
SamClarke 0:5b4bcbd69509 98
SamClarke 0:5b4bcbd69509 99 int main()
SamClarke 0:5b4bcbd69509 100 {
SamClarke 0:5b4bcbd69509 101 pc.baud(115200);
SamClarke 0:5b4bcbd69509 102 GPRS.baud(19200);
SamClarke 0:5b4bcbd69509 103 Thread thread(led_thread);
SamClarke 0:5b4bcbd69509 104 pc.printf("I'm Alive...\n");
SamClarke 0:5b4bcbd69509 105 // Setup the GPS
SamClarke 0:5b4bcbd69509 106 gps.Init();
SamClarke 0:5b4bcbd69509 107 // Set the GPRS AT echo off
SamClarke 0:5b4bcbd69509 108 GPRS.printf("ATE0\r\n");
SamClarke 0:5b4bcbd69509 109 pc.printf("GPRS Echo OFF\n");
SamClarke 0:5b4bcbd69509 110 wait(1);
SamClarke 0:5b4bcbd69509 111 // Delete all messages on the sim card
SamClarke 0:5b4bcbd69509 112 GPRS.printf("AT+CMGDA=\"DEL ALL\"\r\n");
SamClarke 0:5b4bcbd69509 113 wait(1);
SamClarke 0:5b4bcbd69509 114 pc.printf("Messages Cleared...\n");
SamClarke 0:5b4bcbd69509 115 wait(1);
SamClarke 0:5b4bcbd69509 116 // Flush out any \r\nOK\r\n's
SamClarke 0:5b4bcbd69509 117 GPRS.rxBufferFlush();
SamClarke 0:5b4bcbd69509 118 // Get in a while loop
SamClarke 0:5b4bcbd69509 119 while (1) {
SamClarke 0:5b4bcbd69509 120 // Process any recieved data
SamClarke 0:5b4bcbd69509 121 parseSms();
SamClarke 0:5b4bcbd69509 122 // Process / check GPS data
SamClarke 0:5b4bcbd69509 123 if(gps.parseData()) {
SamClarke 0:5b4bcbd69509 124 pc.printf("\nGo to %s%f,%f%s\n", GoogleChunk, gps.latitude, gps.longitude, GoogleExtras);
SamClarke 0:5b4bcbd69509 125 pc.printf("\n\nLocation: %f%c, %f%c \nTime: %4.2f \nSatellites: %d \nAltitude: %3.2f\nSpeed: %3.2f\nHeading: %3.2f\nValidity: %c\n",gps.latitude, gps.ns, gps.longitude, gps.ew, gps.time, gps.satellites, gps.altitude, gps.speed, gps.heading,gps.validity);
SamClarke 0:5b4bcbd69509 126 } else pc.printf("Aquiring Satellites...\n");
SamClarke 0:5b4bcbd69509 127 }
SamClarke 0:5b4bcbd69509 128 }