main.cpp

00001 #include "mbed.h"
00002 #include "ESP8266.h"
00003  
00004 Serial pc(USBTX,USBRX);
00005 
00006 //POT sensor 
00007 AnalogIn pot(PTB0); 
00008 AnalogIn ldr(PTB1);
00009 
00010 //wifi UART port and baud rate
00011 ESP8266 wifi(PTE0, PTE1, 115200); 
00012 
00013 //buffers for wifi library
00014 char snd[255],resp[1000];
00015 char http_cmd[300], comm[300];
00016 
00017 int timeout = 5000; //timeout for wifi commands
00018 
00019 //SSID and password for connection
00020 #define SSID "eduvanceAP"
00021 #define PASS "winteriscoming"
00022 
00023 //Remote IP
00024 #define IP "192.168.0.22"
00025 
00026 //ldrvalue global variable
00027 float ldrval = 0;
00028 float potval = 0; 
00029 
00030 //Public and private keys for phant
00031 //char* Public_Key = "eaWkxgdlQZszLEDKpy6OFeDeO8x";
00032 //char* Private_Key = "25xqpAeBmzSml4Yjpr05Hj3jOBq";
00033  
00034 //Wifi init function
00035 void wifi_initialize(void){
00036     
00037     pc.printf("******** Resetting wifi module ********\r\n");
00038     wifi.Reset();
00039     
00040     //wait for 5 seconds for response, else display no response receiveed
00041     if (wifi.RcvReply(resp, 8000))    
00042         pc.printf("%s",resp);    
00043     else
00044         pc.printf("No response");
00045     
00046     pc.printf("******** Setting Station mode of wifi with AP ********\r\n");
00047     wifi.SetMode(1);    // set transparent  mode
00048     if (wifi.RcvReply(resp, timeout))    //receive a response from ESP
00049         pc.printf("%s",resp);    //Print the response onscreen
00050     else
00051         pc.printf("No response while setting mode. \r\n");
00052     
00053     pc.printf("******** Joining network with SSID and PASS ********\r\n");
00054     wifi.Join(SSID, PASS);     
00055     if (wifi.RcvReply(resp, timeout))    
00056         pc.printf("%s",resp);   
00057     else
00058         pc.printf("No response while connecting to network \r\n");
00059         
00060     pc.printf("******** Getting IP and MAC of module ********\r\n");
00061     wifi.GetIP(resp);     
00062     if (wifi.RcvReply(resp, timeout))    
00063         pc.printf("%s",resp);    
00064     else
00065         pc.printf("No response while getting IP \r\n");
00066     
00067     pc.printf("******** Setting WIFI UART passthrough ********\r\n");
00068     wifi.setTransparent();          
00069     if (wifi.RcvReply(resp, timeout))    
00070         pc.printf("%s",resp);    
00071     else
00072         pc.printf("No response while setting wifi passthrough. \r\n");
00073     wait(1);    
00074     
00075     pc.printf("******** Setting single connection mode ********\r\n");
00076     wifi.SetSingle();             
00077     wifi.RcvReply(resp, timeout);
00078     if (wifi.RcvReply(resp, timeout))    
00079         pc.printf("%s",resp);    
00080     else
00081         pc.printf("No response while setting single connection \r\n");
00082     wait(1);
00083 }
00084 
00085 void wifi_send(void){
00086     
00087     pc.printf("******** Starting TCP connection on IP and port ********\r\n");
00088     wifi.startTCPConn(IP, 1880);    //cipstart
00089     wifi.RcvReply(resp, timeout);
00090     if (wifi.RcvReply(resp, timeout))    
00091         pc.printf("%s",resp);    
00092     else
00093         pc.printf("No response while starting TCP connection \r\n");
00094     wait(1);
00095     
00096     //create link 
00097     sprintf(http_cmd,"/log?pot=%0.2f&ldr=%0.2f",potval,ldrval); 
00098     pc.printf(http_cmd);
00099     
00100     pc.printf("******** Sending URL to wifi ********\r\n");
00101     wifi.sendURL(http_cmd, comm);   //cipsend and get command
00102     if (wifi.RcvReply(resp, timeout))    
00103         pc.printf("%s",resp);    
00104     else
00105         pc.printf("No response while sending URL \r\n");
00106     
00107     //wifi.SendCMD("AT+CIPCLOSE"); //Close the connection to server
00108     //wifi.RcvReply(resp, timeout);
00109     //pc.printf("%s", resp);
00110 }
00111 
00112 int main () {
00113     
00114     
00115     wifi_initialize();
00116     
00117     while (1) {
00118         potval = pot.read();
00119         ldrval = ldr.read();
00120         pc.printf("Potentiometer potvalue=%.3f & ldrvalue=%.3f\r\n",potval,ldrval);
00121         
00122         wifi_send();
00123         wait(3);
00124     }
00125 }
00126     
00127