Thanawat Phattaraworamet
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ESP8266-WEB-Mbed-Controller
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Dependencies: DS18B20_1wire mbed
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ESP8266-WEB-Mbed-Controller
by 
Paul Staron
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main.cpp
00001 // ESP8266 Static page WEB server to control Mbed 00002 00003 #include "mbed.h" 00004 #include "DS18B20.h" 00005 00006 Serial pc(USBTX, USBRX); 00007 Serial esp(PTE0, PTE1); // tx, rx 00008 00009 DS18B20 thermom(A0, DS18B20::RES_12_BIT); 00010 00011 // Standard Mbed LED definitions 00012 DigitalOut led1(LED_RED); // (PTB18) 00013 DigitalOut led2(LED_GREEN); // (PTB19) 00014 DigitalOut led3(LED_BLUE); // (PTD1) 00015 00016 // Digital Out and In pins, can be configured to any suitable pin depending on Platform 00017 DigitalOut Out1(D7); 00018 DigitalOut Out2(D8); 00019 DigitalOut Out3(D4); 00020 00021 DigitalIn In1(A2); 00022 DigitalIn In2(A3); 00023 DigitalIn In3(A4); 00024 00025 PwmOut speaker(D5); 00026 AnalogIn BATin(A1); 00027 00028 Timer t1; 00029 Timer t2; 00030 00031 struct tm t; 00032 00033 int bufflen, DataRX, count, getcount, replycount, servreq, timeout; 00034 int bufl, ipdLen, linkID, weberror, webcounter; 00035 float temperature, AdcIn, Ht; 00036 float R1=100000, R2=10000; // resistor values to give a 10:1 reduction of measured AnalogIn voltage 00037 char Vcc[10]; 00038 char Temp[10]; 00039 char temp[10]; 00040 char webcount[8]; 00041 char lasthit[30]; 00042 char timebuf[30]; 00043 char type[16]; 00044 char type1[16]; 00045 char channel[2]; 00046 char cmdbuff[32]; 00047 char replybuff[512]; 00048 char webdata[1024]; // This may need to be bigger depending on WEB browser used 00049 char webbuff[4096]; // Currently using 1986 characters, Increase this if more web page data added 00050 00051 void SendCMD(),getreply(),ReadWebData(),startserver(),sendpage(),SendWEB(),sendcheck(); 00052 void gettime(),gettemp(),getbattery(),setRTC(),beep(); 00053 00054 // manual set RTC values 00055 int minute =20; // 0-59 00056 int hour =9; // 2-23 00057 int dayofmonth =20; // 1-31 00058 int month =2; // 1-12 00059 int year =15; // last 2 digits 00060 00061 int port =8266; // set server port 00062 int SERVtimeout =5; // set server timeout in seconds incase link breaks. 00063 00064 // Serial Interrupt read ESP data 00065 void callback() { 00066 while (esp.readable()) {webbuff[count] = esp.getc();count++;} 00067 if(strlen(webbuff)>bufflen){DataRX=1;} 00068 } 00069 00070 int main() { 00071 led1=1,led2=1,led3=1; 00072 pc.baud(115200); 00073 esp.baud(115200); // ESP8266 baudrate. Maximum on KLxx' is 115200, 230400 works on K20 and K22F 00074 if (time(NULL) < 1420070400) {setRTC();} 00075 beep(); 00076 startserver(); 00077 00078 while(1){ 00079 if(DataRX==1){ 00080 ReadWebData(); 00081 beep(); 00082 if (servreq == 1 && weberror == 0){sendpage();} 00083 esp.attach(&callback); 00084 pc.printf(" IPD Data:\r\n\n Link ID = %d,\r\n IPD Header Length = %d \r\n IPD Type = %s\r\n", linkID, ipdLen, type); 00085 pc.printf("\n\n HTTP Packet: \n\n%s\n", webdata); 00086 pc.printf(" Web Characters sent : %d\n\n", bufl); 00087 pc.printf(" -------------------------------------\n\n"); 00088 strcpy(lasthit, timebuf); 00089 servreq=0; 00090 } 00091 } 00092 } 00093 // Static WEB page 00094 void sendpage() 00095 { 00096 gettemp(); 00097 getbattery();gettime(); 00098 00099 // WEB page data 00100 strcpy(webbuff, "<!DOCTYPE html>"); 00101 strcat(webbuff, "<html><head><title>ESP8266 Mbed</title></head>"); 00102 strcat(webbuff, "<body>"); 00103 strcat(webbuff, "<div style=\"text-align:center; background-color:#F4F4F4; color:#00AEDB;\"><h1>ESP8266 Mbed Web Controller</h1>"); 00104 strcat(webbuff, "Hit Count - "); 00105 strcat(webbuff, webcount); 00106 strcat(webbuff, "<br>Last Hit - "); 00107 strcat(webbuff, lasthit); 00108 strcat(webbuff, "</div><br /><hr>"); 00109 strcat(webbuff, "<h3>Mbed RTC Time -  "); 00110 strcat(webbuff, timebuf); 00111 strcat(webbuff, "</h3>\r\n"); 00112 strcat(webbuff, "<p><form method=\"POST\"><strong> Temperature:  <input type=\"text\" size=6 value=\""); 00113 strcat(webbuff, Temp); 00114 strcat(webbuff, "\"> <sup>O</sup>C <form method=\"POST\"> <strong>   Battery:  <input type=\"text\" size=4 value=\""); 00115 strcat(webbuff, Vcc); 00116 strcat(webbuff, "\"> </sup>V"); 00117 if(led1==1){strcat(webbuff, "<p><input type=\"radio\" name=\"led1\" value=\"0\" checked> Red LED off"); 00118 strcat(webbuff, "<br><input type=\"radio\" name=\"led1\" value=\"1\" > Red LED on");} 00119 else{strcat(webbuff, "<p><input type=\"radio\" name=\"led1\" value=\"0\" > Red LED off"); 00120 strcat(webbuff, "<br><input type=\"radio\" name=\"led1\" value=\"1\" checked> Red LED on");} 00121 if(Out1==0){strcat(webbuff, "<p><input type=\"radio\" name=\"Out1\" value=\"0\" checked> Digital Out 1 off"); 00122 strcat(webbuff, "<br><input type=\"radio\" name=\"Out1\" value=\"1\" > Digital Out 1 on");} 00123 else{strcat(webbuff, "<p><input type=\"radio\" name=\"Out1\" value=\"0\" > Digital Out 1 off"); 00124 strcat(webbuff, "<br><input type=\"radio\" name=\"Out1\" value=\"1\" checked> Digital Out 1 on");} 00125 if(Out2==0){strcat(webbuff, "<p><input type=\"radio\" name=\"Out2\" value=\"0\" checked> Digital Out 2 off"); 00126 strcat(webbuff, "<br><input type=\"radio\" name=\"Out2\" value=\"1\" > Digital Out 2 on");} 00127 else{strcat(webbuff, "<p><input type=\"radio\" name=\"Out2\" value=\"0\" > Digital Out 2 off"); 00128 strcat(webbuff, "<br><input type=\"radio\" name=\"Out2\" value=\"1\" checked> Digital Out 2 on");} 00129 if(Out3==0){strcat(webbuff, "<p><input type=\"radio\" name=\"Out3\" value=\"0\" checked> Digital Out 3 off"); 00130 strcat(webbuff, "<br><input type=\"radio\" name=\"Out3\" value=\"1\" > Digital Out 3 on");} 00131 else{strcat(webbuff, "<p><input type=\"radio\" name=\"Out3\" value=\"0\" > Digital Out 3 off"); 00132 strcat(webbuff, "<br><input type=\"radio\" name=\"Out3\" value=\"1\" checked> Digital Out 3 on");} 00133 if(In1==0){strcat(webbuff, "<p><input type=\"radio\" name=\"In1\" value=\"0\" > Digital In 1");} 00134 else{strcat(webbuff, "<p><input type=\"radio\" name=\"In1\" value=\"1\" checked> Digital In 1");} 00135 if(In2==0){strcat(webbuff, "<br><input type=\"radio\" name=\"In2\" value=\"0\" > Digital In 2");} 00136 else{strcat(webbuff, "<br><input type=\"radio\" name=\"In2\" value=\"1\" checked> Digital In 2");} 00137 if(In3==0){strcat(webbuff, "<br><input type=\"radio\" name=\"In3\" value=\"0\" > Digital In 3");} 00138 else{strcat(webbuff, "<br><input type=\"radio\" name=\"In3\" value=\"1\" checked> Digital In 3");} 00139 strcat(webbuff, "</strong><p><input type=\"submit\" value=\"send-refresh\" style=\"background: #3498db;"); 00140 strcat(webbuff, "background-image:-webkit-linear-gradient(top, #3498db, #2980b9);"); 00141 strcat(webbuff, "background-image:linear-gradient(to bottom, #3498db, #2980b9);"); 00142 strcat(webbuff, "-webkit-border-radius:12;border-radius: 12px;font-family: Arial;color:#ffffff;font-size:20px;padding:"); 00143 strcat(webbuff, "10px 20px 10px 20px; border:solid #103c57 3px;text-decoration: none;"); 00144 strcat(webbuff, "background: #3cb0fd;"); 00145 strcat(webbuff, "background-image:-webkit-linear-gradient(top,#3cb0fd,#1a5f8a);"); 00146 strcat(webbuff, "background-image:linear-gradient(to bottom,#3cb0fd,#1a5f8a);"); 00147 strcat(webbuff, "text-decoration:none;\"></form></span>"); 00148 strcat(webbuff, "<p/><h2>How to use:</h2><ul>"); 00149 strcat(webbuff, "<li>Select the Radio buttons to control the digital out pins.</li>"); 00150 strcat(webbuff, "<li>Click 'Send-Refresh' to send.</li>"); 00151 strcat(webbuff, "<li>Use the 'Send-Refresh' button to refresh the data.</li>"); 00152 strcat(webbuff, "</ul>"); 00153 strcat(webbuff, "</body></html>"); 00154 // end of WEB page data 00155 bufl = strlen(webbuff); // get total page buffer length 00156 sprintf(cmdbuff,"AT+CIPSEND=%d,%d\r\n", linkID, bufl); // send IPD link channel and buffer character length. 00157 timeout=200;getcount=7; 00158 SendCMD(); 00159 getreply(); 00160 SendWEB(); // send web page 00161 memset(webbuff, '\0', sizeof(webbuff)); 00162 sendcheck(); 00163 } 00164 00165 // wait for ESP "SEND OK" reply, then close IP to load web page 00166 void sendcheck() 00167 { 00168 weberror=1;timeout=500;getcount=24; 00169 t2.reset();t2.start(); 00170 while(weberror==1 && t2.read() <5){ 00171 getreply(); 00172 if (strstr(replybuff, "SEND OK") != NULL) {weberror=0;} // wait for valid SEND OK 00173 } 00174 if(weberror==1){ // restart connection 00175 strcpy(cmdbuff, "AT+CIPMUX=1\r\n"); 00176 timeout=500;getcount=10; 00177 SendCMD();getreply(); 00178 sprintf(cmdbuff,"AT+CIPSERVER=1,%d\r\n", port); 00179 timeout=500;getcount=10; 00180 SendCMD();getreply(); 00181 } 00182 else{ 00183 sprintf(cmdbuff, "AT+CIPCLOSE=%s\r\n",channel); // close current connection 00184 SendCMD();} 00185 t2.reset(); 00186 } 00187 00188 // Reads and processes GET and POST web data 00189 void ReadWebData() 00190 { 00191 wait_ms(200); 00192 esp.attach(NULL); 00193 count=0;DataRX=0;weberror=0; 00194 memset(webdata, '\0', sizeof(webdata)); 00195 int x = strcspn (webbuff,"+"); 00196 if(x){ 00197 strcpy(webdata, webbuff + x);weberror=0; 00198 int numMatched = sscanf(webdata,"+IPD,%d,%d:%s", &linkID, &ipdLen, type); 00199 if( strstr(webdata, "led1=1") != NULL ) {led1=0;} 00200 if( strstr(webdata, "led1=0") != NULL ) {led1=1;} 00201 if( strstr(webdata, "Out1=1") != NULL ) {Out1=1;} 00202 if( strstr(webdata, "Out1=0") != NULL ) {Out1=0;} 00203 if( strstr(webdata, "Out2=1") != NULL ) {Out2=1;} 00204 if( strstr(webdata, "Out2=0") != NULL ) {Out2=0;} 00205 if( strstr(webdata, "Out3=1") != NULL ) {Out3=1;} 00206 if( strstr(webdata, "Out3=0") != NULL ) {Out3=0;} 00207 sprintf(channel, "%d",linkID); 00208 if (strstr(webdata, "GET") != NULL) {servreq=1;} 00209 if (strstr(webdata, "POST") != NULL) {servreq=1;} 00210 webcounter++; 00211 sprintf(webcount, "%d",webcounter); 00212 } 00213 else { 00214 memset(webbuff, '\0', sizeof(webbuff)); 00215 esp.attach(&callback);weberror=1; 00216 } 00217 } 00218 // Starts and restarts webserver if errors detected. 00219 void startserver() 00220 { 00221 gettemp();gettime(); 00222 pc.printf("\n\n RTC time %s\r\n\n",timebuf); 00223 pc.printf("++++++++++ Resetting ESP ++++++++++\r\n"); 00224 strcpy(cmdbuff,"AT+RST\r\n"); 00225 timeout=2000;getcount=600; 00226 SendCMD(); 00227 getreply(); 00228 pc.printf(replybuff); 00229 pc.printf("%d",count); 00230 if (strstr(replybuff, "OK") != NULL) { 00231 pc.printf("\n++++++++++ Starting Server ++++++++++\r\n"); 00232 strcpy(cmdbuff, "AT+CIPMUX=1\r\n"); // set multiple connections. 00233 timeout=500;getcount=10; 00234 SendCMD(); 00235 getreply(); 00236 sprintf(cmdbuff,"AT+CIPSERVER=1,%d\r\n", port); 00237 timeout=500;getcount=10; 00238 SendCMD(); 00239 getreply(); 00240 sprintf(cmdbuff,"AT+CIPSTO=%d\r\n",SERVtimeout); 00241 timeout=500;getcount=50; 00242 SendCMD(); 00243 getreply(); 00244 pc.printf("\n Getting Server IP \r\n"); 00245 strcpy(cmdbuff, "AT+CIFSR\r\n"); 00246 timeout=1000;getcount=50; 00247 while(weberror==0){ 00248 SendCMD();getreply(); 00249 if (strstr(replybuff, "0.0.0.0") == NULL) {weberror=1;} // wait for valid IP 00250 } 00251 pc.printf("\n Enter WEB address in your browser \r\n\n"); 00252 replybuff[strlen(replybuff) - 8] = '\0'; 00253 char* IP = replybuff + 5; 00254 sprintf(webdata," http://%s:%d", IP, port); 00255 pc.printf(webdata); 00256 led2=0;wait(2);led2=1; 00257 bufflen=200;count=0; 00258 pc.printf("\n\n++++++++++ Ready ++++++++++\r\n\n"); 00259 esp.attach(&callback); 00260 } 00261 else{ 00262 pc.printf("\n++++++++++ ESP8266 error, check power/connections ++++++++++\r\n"); 00263 while(1){} 00264 } 00265 t2.reset();t2.start();beep(); 00266 } 00267 // ESP Command data send 00268 void SendCMD() 00269 { 00270 esp.printf("%s", cmdbuff); 00271 } 00272 // Large WEB buffer data send 00273 void SendWEB() 00274 { 00275 int i=0; 00276 if(esp.writeable()) { 00277 while(webbuff[i]!='\0') {esp.putc(webbuff[i]);i++;} 00278 } 00279 } 00280 // Get Cammand and ESP status replies 00281 void getreply() 00282 { 00283 memset(replybuff, '\0', sizeof(replybuff)); 00284 t1.reset(); t1.start();replycount=0; 00285 while(t1.read_ms()< timeout && replycount < getcount) { 00286 if(esp.readable()) { 00287 replybuff[replycount] = esp.getc();replycount++; 00288 } 00289 } 00290 t1.stop(); 00291 } 00292 // Analog in example 00293 void getbattery() 00294 { 00295 AdcIn=BATin.read(); 00296 Ht = (AdcIn*3.328f*(R1+R2)/R2); // set the numeric to the exact MCU analog reference voltage for greater accuracy 00297 sprintf(Vcc,"%2.3f",Ht); 00298 } 00299 // Temperature example 00300 void gettemp() 00301 { 00302 temperature=thermom.GetTemperature(); // comment this out if no sensor connected 00303 //temperature = 21.357; // include for dummy value 00304 sprintf(Temp,"%3.3f",temperature); 00305 } 00306 // Get RTC time 00307 void gettime() 00308 { 00309 time_t seconds = time(NULL); 00310 strftime(timebuf,50,"%H:%M:%S %a %d %b %y", localtime(&seconds)); 00311 } 00312 00313 void beep() 00314 { 00315 speaker.period(1.0/2000); // 2000hz period 00316 speaker = 0.5; //50% duty cycle - max volume 00317 wait_ms(60); 00318 speaker=0.0; // turn off audio 00319 } 00320 00321 void setRTC() 00322 { 00323 t.tm_sec = (0); // 0-59 00324 t.tm_min = (minute); // 0-59 00325 t.tm_hour = (hour); // 0-23 00326 t.tm_mday = (dayofmonth); // 1-31 00327 t.tm_mon = (month-1); // 0-11 "0" = Jan, -1 added for Mbed RCT clock format 00328 t.tm_year = ((year)+100); // year since 1900, current DCF year + 100 + 1900 = correct year 00329 set_time(mktime(&t)); // set RTC clock 00330 }
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