main.cpp

00001 #include "mbed.h"
00002 
00003 Serial pc(USBTX, USBRX);
00004 Serial esp(p28, p27); // tx, rx
00005 DigitalOut reset(p26);
00006 Timer t;
00007 
00008 int  count,ended,timeout;
00009 char buf[1024];
00010 char snd[255];
00011 
00012 char ssid[32] = "mySSID";     // enter WiFi router ssid inside the quotes
00013 char pwd [32] = "myPASSWORD"; // enter WiFi router password inside the quotes
00014 
00015 void SendCMD(),getreply(),ESPconfig(),ESPsetbaudrate();
00016 
00017 
00018 int main()
00019 {
00020     reset=0; //hardware reset for 8266
00021     pc.baud(115200);  // set what you want here depending on your terminal program speed
00022     pc.printf("\f\n\r-------------ESP8266 Hardware Reset-------------\n\r");
00023     wait(0.5);
00024     reset=1;
00025     timeout=2;
00026     getreply();
00027 
00028     esp.baud(115200);   // change this to the new ESP8266 baudrate if it is changed at any time.
00029 
00030     //ESPsetbaudrate();   //******************  include this routine to set a different ESP8266 baudrate  ******************
00031 
00032     ESPconfig();        //******************  include Config to set the ESP8266 configuration  ***********************
00033 
00034 
00035 
00036     // continuosly get AP list and IP
00037     while(1) {
00038         pc.printf("\n---------- Listing Acces Points ----------\r\n");
00039         strcpy(snd, "AT+CWLAP\r\n");
00040         SendCMD();
00041         timeout=15;
00042         getreply();
00043         pc.printf(buf);
00044         wait(2);
00045         pc.printf("\n---------- Get IP and MAC ----------\r\n");
00046         strcpy(snd, "AT+CIFSR\r\n");
00047         SendCMD();
00048         timeout=10;
00049         getreply();
00050         pc.printf(buf);
00051         wait(2);
00052     }
00053 
00054 }
00055 
00056 // Sets new ESP8266 baurate, change the esp.baud(xxxxx) to match your new setting once this has been executed
00057 void ESPsetbaudrate()
00058 {
00059     strcpy(snd, "AT+CIOBAUD=115200\r\n");   // change the numeric value to the required baudrate
00060     SendCMD();
00061 }
00062 
00063 //  +++++++++++++++++++++++++++++++++ This is for ESP8266 config only, run this once to set up the ESP8266 +++++++++++++++
00064 void ESPconfig()
00065 {
00066     wait(5);
00067     strcpy(snd,"AT\r\n");
00068     SendCMD();
00069     wait(1);
00070     strcpy(snd,"AT\r\n");
00071     SendCMD();
00072     wait(1);
00073     strcpy(snd,"AT\r\n");
00074     SendCMD();
00075     timeout=1;
00076     getreply();
00077     wait(1);
00078     pc.printf("\f---------- Starting ESP Config ----------\r\n\n");
00079 
00080     pc.printf("---------- Reset & get Firmware ----------\r\n");
00081     strcpy(snd,"AT+RST\r\n");
00082     SendCMD();
00083     timeout=5;
00084     getreply();
00085     pc.printf(buf);
00086 
00087     wait(2);
00088 
00089     pc.printf("\n---------- Get Version ----------\r\n");
00090     strcpy(snd,"AT+GMR\r\n");
00091     SendCMD();
00092     timeout=4;
00093     getreply();
00094     pc.printf(buf);
00095 
00096     wait(3);
00097 
00098     // set CWMODE to 1=Station,2=AP,3=BOTH, default mode 1 (Station)
00099     pc.printf("\n---------- Setting Mode ----------\r\n");
00100     strcpy(snd, "AT+CWMODE=1\r\n");
00101     SendCMD();
00102     timeout=4;
00103     getreply();
00104     pc.printf(buf);
00105 
00106     wait(2);
00107 
00108     // set CIPMUX to 0=Single,1=Multi
00109     pc.printf("\n---------- Setting Connection Mode ----------\r\n");
00110     strcpy(snd, "AT+CIPMUX=1\r\n");
00111     SendCMD();
00112     timeout=4;
00113     getreply();
00114     pc.printf(buf);
00115 
00116     wait(2);
00117 
00118     pc.printf("\n---------- Listing Access Points ----------\r\n");
00119     strcpy(snd, "AT+CWLAP\r\n");
00120     SendCMD();
00121     timeout=15;
00122     getreply();
00123     pc.printf(buf);
00124 
00125     wait(2);
00126 
00127     pc.printf("\n---------- Connecting to AP ----------\r\n");
00128     pc.printf("ssid = %s   pwd = %s\r\n",ssid,pwd);
00129     strcpy(snd, "AT+CWJAP=\"");
00130     strcat(snd, ssid);
00131     strcat(snd, "\",\"");
00132     strcat(snd, pwd);
00133     strcat(snd, "\"\r\n");
00134     SendCMD();
00135     timeout=10;
00136     getreply();
00137     pc.printf(buf);
00138 
00139     wait(5);
00140 
00141     pc.printf("\n---------- Get IP's ----------\r\n");
00142     strcpy(snd, "AT+CIFSR\r\n");
00143     SendCMD();
00144     timeout=3;
00145     getreply();
00146     pc.printf(buf);
00147 
00148     wait(1);
00149 
00150     pc.printf("\n---------- Get Connection Status ----------\r\n");
00151     strcpy(snd, "AT+CIPSTATUS\r\n");
00152     SendCMD();
00153     timeout=5;
00154     getreply();
00155     pc.printf(buf);
00156 
00157     pc.printf("\n\n\n  If you get a valid (non zero) IP, ESP8266 has been set up.\r\n");
00158     pc.printf("  Run this if you want to reconfig the ESP8266 at any time.\r\n");
00159     pc.printf("  It saves the SSID and password settings internally\r\n");
00160     wait(10);
00161 }
00162 
00163 void SendCMD()
00164 {
00165     esp.printf("%s", snd);
00166 }
00167 
00168 void getreply()
00169 {
00170     memset(buf, '\0', sizeof(buf));
00171     t.start();
00172     ended=0;
00173     count=0;
00174     while(!ended) {
00175         if(esp.readable()) {
00176             buf[count] = esp.getc();
00177             count++;
00178         }
00179         if(t.read() > timeout) {
00180             ended = 1;
00181             t.stop();
00182             t.reset();
00183         }
00184     }
00185 }