main.cpp

00001 #include "mbed.h"
00002 
00003 Serial pc(USBTX, USBRX);
00004 Serial esp(p13,p14);    // tx,rx LPC1768
00005 //Serial esp(D8,D2);      // tx,rx Nucleo
00006 
00007 Timer t;
00008 
00009 char cmdbuff[1024];
00010 char snd[255];
00011 int timeout;
00012 int Baud;
00013 
00014 char ssid[32] = "ssid";         // enter router ssid inside the quotes
00015 char pwd [32] = "password";     // enter router password inside the quotes
00016 
00017 void SendCMD(),getreply(),config(),restore(),getESP();
00018 void setbaud(int espbaud);
00019 
00020 
00021 int main() {
00022     
00023     pc.baud(115200);
00024     esp.baud(115200);   // Default baud is 115200, change this to match setbaud() rate.    
00025     
00026     pc.printf("\033[0m\033[2J\033[H\n  Initialize....\r\n\n\n");
00027 
00028     // restore();       //include to restore ESP8266 to default settings at 115200 baud.    
00029     // setbaud(460800); //include to set a different ESP8266 baudrate, saved in ESP8266 flash.   
00030     // config();        //include Config to set SSID, PASSWORD and MODE configuration saved in ESP8266 flash.
00031            
00032     strcpy(snd,"ATE0\r\n");
00033     SendCMD();    // set no AT ESP echo  
00034     timeout=5000;
00035     getreply();
00036     pc.printf(cmdbuff);
00037     
00038     pc.printf("Set Mode to station...\r\n");
00039     strcpy(snd, "AT+CWMODE=1\r\n");
00040     SendCMD();
00041     timeout=1000;
00042     getreply();
00043     pc.printf(cmdbuff);
00044     
00045     pc.printf("Connect to AP settings NOT stored in flash..\r\n");
00046     pc.printf("ssid = %s   pwd = %s\r\n",ssid,pwd);
00047     strcpy(snd, "AT+CWJAP_CUR=\"");
00048     strcat(snd, ssid);
00049     strcat(snd, "\",\"");
00050     strcat(snd, pwd);
00051     strcat(snd, "\"\r\n");   
00052     SendCMD();
00053     timeout=8000;
00054     getreply();    
00055     pc.printf(cmdbuff);
00056     
00057     getESP();     
00058 }
00059 
00060 // contiuosly get ESP82660Firmware, AP list, IP and MAC
00061 void getESP()
00062 {
00063     while(1){
00064          
00065         pc.printf("\033[0m\033[2J\033[H ESP8266 check...\r\n\n\n");
00066         
00067         pc.printf("  Firmware Version...\r\n");
00068         strcpy(snd,"AT+GMR\r\n");
00069         SendCMD();
00070         timeout=5000;
00071         getreply();
00072         pc.printf(cmdbuff); 
00073         
00074         pc.printf("\n  AP's...\r\n"); 
00075         strcpy(snd, "AT+CWLAP\r\n");
00076         SendCMD();
00077         timeout=3000;
00078         getreply();   
00079         pc.printf(cmdbuff);
00080 
00081         pc.printf("  IP and MAC...\r\n"); 
00082         strcpy(snd, "AT+CIFSR\r\n");
00083         SendCMD();
00084         timeout=2000;
00085         getreply(); 
00086         pc.printf(cmdbuff);                
00087         wait_us(5000000);
00088     }    
00089 }
00090 
00091 // resturns ESP8266 back to default settings.
00092 void restore()
00093 {
00094     pc.printf("Restore ESP8266 to default...\r\n");
00095     t.reset();t.start();
00096     strcpy(snd, "AT+RESTORE\r\n");
00097     SendCMD();
00098     timeout=5000;
00099     getreply();
00100     pc.printf(cmdbuff);
00101     wait_us(2000000);  
00102     esp.baud(115200);   // set baud back to ESP8266 default         
00103     strcpy(snd,"ATE0\r\n");
00104     SendCMD();    // set no ESP echo  
00105     timeout=5000;
00106     getreply();  
00107     pc.printf("Remember to set esp.baud to default rate 115200\r\n");
00108     wait_us(5000000);  
00109 }
00110 
00111 // Sets new ESP8266 baurate, change the esp.baud(xxxxx) to match your new setting once this has been executed
00112 void setbaud(int espbaud)
00113 {
00114     if(espbaud!=115200 && espbaud!=230400 && espbaud!=460800 && espbaud!=921600){
00115         return;
00116         }
00117     pc.printf("setting ESP8266 baud to: %d\r\n",espbaud); 
00118     uint32_t    databits=8;
00119     uint32_t    stopbits=1;
00120     uint32_t    parity=0;
00121     uint32_t    flowcontrol=0;
00122     //  default mode     8,1,0,0
00123     //  <databits>:   <stopbits>:           <parity>:   <flowcontrol>:
00124     //  5-bit data    1=1-bit stop bit      0: None     0: flow control disabled
00125     //  6-bit data    2=1.5-bit stop bit    1: Odd      1: enable RTS
00126     //  7-bit data    3=2-bit stop bit      2: Even     2: enable CTS
00127     //  8-bit data                                      3: enable both RTS and CTS   
00128         
00129     sprintf(snd,"AT+UART_DEF=%d,%d,%d,%d,%d\r\n",espbaud,databits,stopbits,parity,flowcontrol);
00130     SendCMD(); 
00131     pc.printf("Remember to set esp.baud to new rate: %d\r\n",espbaud); 
00132     wait_us(3000000);  
00133     esp.baud(espbaud);   // set baud new rate    
00134 }    
00135 
00136 // To configure ESP8266 permanant settings in flash
00137 void config()
00138 {
00139     pc.printf("\033[0m\033[2J\033[H Starting ESP Config stored in flash\r\n\n\n");
00140             
00141     // set CWMODE to 1=Station,2=AP,3=BOTH, default mode 1 (Station)
00142     pc.printf("Set Mode...\r\n");
00143     strcpy(snd, "AT+CWMODE_DEF=1\r\n");
00144     SendCMD();
00145     timeout=1000;
00146     getreply();
00147     pc.printf(cmdbuff);
00148     
00149     pc.printf("Listing Acces Points...\r\n");
00150     strcpy(snd, "AT+CWLAP\r\n");
00151     SendCMD();
00152     timeout=3000;
00153     getreply();   
00154     pc.printf(cmdbuff); 
00155     
00156     pc.printf("Connecting to AP...\r\n");
00157     pc.printf("ssid = %s   pwd = %s\r\n",ssid,pwd);
00158     strcpy(snd, "AT+CWJAP_DEF=\"");
00159     strcat(snd, ssid);
00160     strcat(snd, "\",\"");
00161     strcat(snd, pwd);
00162     strcat(snd, "\"\r\n");   
00163     SendCMD();
00164     timeout=8000;
00165     getreply();    
00166     pc.printf(cmdbuff);
00167         
00168     pc.printf("Get IP's...\r\n"); 
00169     strcpy(snd, "AT+CIFSR\r\n");
00170     SendCMD();
00171     timeout=2000;
00172     getreply(); 
00173     pc.printf(cmdbuff);
00174     
00175     pc.printf("\n\n\n  If you get a valid IP, ESP8266 has been set up.\r\n");
00176     wait_us(5000000);
00177     
00178     getESP();
00179 } 
00180 
00181 void SendCMD()
00182 {    
00183     esp.printf("%s", snd);    
00184 } 
00185 
00186 void getreply()
00187 {    
00188     uint32_t i=0;
00189     memset(cmdbuff, '\0', sizeof(cmdbuff));
00190     t.reset();t.start();
00191     while(t.read_ms()< timeout) {
00192         if(esp.readable()) {
00193             cmdbuff[i] = esp.getc();i++;
00194             }
00195             if (cmdbuff[i-2] == 0x4f && cmdbuff[i-1] == 0x4b){break;}
00196         }
00197     cmdbuff[i-2]=0x00;    // remove the 'OK' from message
00198     t.stop();
00199 }              
00200