jim hamblen
For ESP8266 Wi Fi SOC from Sparkfun on the mbed LPC1768. Sets up a web page server that can control a few mbed pins. Nice IoT demo. Need to configure Wi Fi SSID and PASSWORD first with another program first (one time only). See https://developer.mbed.org/users/4180_1/notebook/using-the-esp8266-with-the-mbed-lpc1768/ for more info.
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ESP8266-WEB-Mbed-Controller
by 
Paul Staron
Diff: main.cpp
- Revision:
- 3:f7febfa77784
- Parent:
- 2:d4c6bc0f2dc4
- Child:
- 4:40dd020463ea
--- a/main.cpp Thu Feb 19 23:47:54 2015 +0000
+++ b/main.cpp Tue Feb 24 23:58:24 2015 +0000
@@ -30,7 +30,7 @@
struct tm t;
-int buflen, DataRX, count, getcount, ended, servreq, timeout;
+int bufflen, DataRX, count, getcount, replycount, servreq, timeout;
int bufl, ipdLen, linkID, weberror, webcounter;
float temperature, AdcIn, Ht;
float R1=100000, R2=10000; // resistor values to give a 10:1 reduction of measured AnalogIn voltage
@@ -38,156 +38,163 @@
char Temp[10];
char temp[10];
char webcount[8];
-char lasthit[60];
+char lasthit[30];
char timebuf[30];
char type[16];
char type1[16];
char channel[2];
-char snd[256];
+char cmdbuff[32];
+char replybuff[512];
char webdata[1024]; // This may need to be bigger depending on WEB browser used
-char buf[4096]; // Currently using 1407 characters, Increase this if more web page data added
+char webbuff[4096]; // Currently using 1986 characters, Increase this if more web page data added
void SendCMD(),getreply(),ReadWebData(),startserver(),sendpage(),SendWEB(),sendcheck();
void gettime(),gettemp(),getbattery(),setRTC(),beep();
// manual set RTC values
-int minute =13; // 0-59
-int hour =15; // 2-23
-int dayofmonth =19; // 1-31
+int minute =20; // 0-59
+int hour =9; // 2-23
+int dayofmonth =20; // 1-31
int month =2; // 1-12
int year =15; // last 2 digits
-int port =90; // set server port
+int port =8266; // set server port
+int SERVtimeout =5; // set server timeout in seconds incase link breaks.
// Serial Interrupt read ESP data
void callback() {
- while (esp.readable()) {buf[count] = esp.getc();count++;}
- if(strlen(buf)>buflen){DataRX=1;}
+ while (esp.readable()) {webbuff[count] = esp.getc();count++;}
+ if(strlen(webbuff)>bufflen){DataRX=1;}
}
int main() {
led1=1,led2=1,led3=1;
pc.baud(115200);
- esp.baud(115200); // ESP8266 baudrate.
+ esp.baud(115200); // ESP8266 baudrate. Maximum on KLxx' is 115200, 230400 works on K20 and K22F
if (time(NULL) < 1420070400) {setRTC();}
beep();
startserver();
- while(1){
-
+ while(1){
if(DataRX==1){
ReadWebData();
beep();
- if (servreq == 1 && weberror == 0){sendpage();}
+ if (servreq == 1 && weberror == 0){sendpage();}
+ esp.attach(&callback);
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);
pc.printf("\n\n HTTP Packet: \n\n%s\n", webdata);
pc.printf(" Web Characters sent : %d\n\n", bufl);
pc.printf(" -------------------------------------\n\n");
- esp.attach(&callback);
strcpy(lasthit, timebuf);
servreq=0;
- }
- if(t2.read()>900){startserver();} // restart server every 15 minutes after no activity in case of ESP lock out.
+ }
}
}
// Static WEB page
void sendpage()
{
- gettemp();getbattery();gettime();
- memset(buf, '\0', sizeof(buf));
-
+ gettemp();
+ getbattery();gettime();
+
// WEB page data
- strcpy(buf, "<!DOCTYPE html>");
- strcat(buf, "<html><head><title>ESP8266 Mbed</title></head>");
- strcat(buf, "<body>");
- strcat(buf, "<div style=\"text-align:center; background-color:#F4F4F4; color:#00AEDB;\"><h1>ESP8266 Mbed Web Controller</h1>");
- strcat(buf, "Hit Count - ");
- strcat(buf, webcount);
- strcat(buf, "<br>Last Hit - ");
- strcat(buf, lasthit);
- strcat(buf, "</div><br /><hr>");
- strcat(buf, "<h3>Mbed RTC Time - ");
- strcat(buf, timebuf);
- strcat(buf, "</h3>\r\n");
- strcat(buf, "<p><form method=\"POST\"><strong> Temperature: <input type=\"text\" size=6 value=\"");
- strcat(buf, Temp);
- strcat(buf, "\"> <sup>O</sup>C <form method=\"POST\"> <strong> Battery: <input type=\"text\" size=4 value=\"");
- strcat(buf, Vcc);
- strcat(buf, "\"> </sup>V");
- if(led1==1){strcat(buf, "<p><input type=\"radio\" name=\"led1\" value=\"0\" checked> Red LED off");
- strcat(buf, "<br><input type=\"radio\" name=\"led1\" value=\"1\" > Red LED on");}
- else{strcat(buf, "<p><input type=\"radio\" name=\"led1\" value=\"0\" > Red LED off");
- strcat(buf, "<br><input type=\"radio\" name=\"led1\" value=\"1\" checked> Red LED on");}
- if(Out1==0){strcat(buf, "<p><input type=\"radio\" name=\"Out1\" value=\"0\" checked> Digital Out 1 off");
- strcat(buf, "<br><input type=\"radio\" name=\"Out1\" value=\"1\" > Digital Out 1 on");}
- else{strcat(buf, "<p><input type=\"radio\" name=\"Out1\" value=\"0\" > Digital Out 1 off");
- strcat(buf, "<br><input type=\"radio\" name=\"Out1\" value=\"1\" checked> Digital Out 1 on");}
- if(Out2==0){strcat(buf, "<p><input type=\"radio\" name=\"Out2\" value=\"0\" checked> Digital Out 2 off");
- strcat(buf, "<br><input type=\"radio\" name=\"Out2\" value=\"1\" > Digital Out 2 on");}
- else{strcat(buf, "<p><input type=\"radio\" name=\"Out2\" value=\"0\" > Digital Out 2 off");
- strcat(buf, "<br><input type=\"radio\" name=\"Out2\" value=\"1\" checked> Digital Out 2 on");}
- if(Out3==0){strcat(buf, "<p><input type=\"radio\" name=\"Out3\" value=\"0\" checked> Digital Out 3 off");
- strcat(buf, "<br><input type=\"radio\" name=\"Out3\" value=\"1\" > Digital Out 3 on");}
- else{strcat(buf, "<p><input type=\"radio\" name=\"Out3\" value=\"0\" > Digital Out 3 off");
- strcat(buf, "<br><input type=\"radio\" name=\"Out3\" value=\"1\" checked> Digital Out 3 on");}
- if(In1==0){strcat(buf, "<p><input type=\"radio\" name=\"In1\" value=\"0\" > Digital In 1");}
- else{strcat(buf, "<p><input type=\"radio\" name=\"In1\" value=\"1\" checked> Digital In 1");}
- if(In2==0){strcat(buf, "<br><input type=\"radio\" name=\"In2\" value=\"0\" > Digital In 2");}
- else{strcat(buf, "<br><input type=\"radio\" name=\"In2\" value=\"1\" checked> Digital In 2");}
- if(In3==0){strcat(buf, "<br><input type=\"radio\" name=\"In3\" value=\"0\" > Digital In 3");}
- else{strcat(buf, "<br><input type=\"radio\" name=\"In3\" value=\"1\" checked> Digital In 3");}
- strcat(buf, "</strong><p><input type=\"submit\" value=\"send-refresh\" style=\"background: #3498db;");
- strcat(buf, "background-image:-webkit-linear-gradient(top, #3498db, #2980b9);");
- strcat(buf, "background-image:linear-gradient(to bottom, #3498db, #2980b9);");
- strcat(buf, "-webkit-border-radius:12;border-radius: 12px;font-family: Arial;color:#ffffff;font-size:20px;padding:");
- strcat(buf, "10px 20px 10px 20px; border:solid #103c57 3px;text-decoration: none;");
- strcat(buf, "background: #3cb0fd;");
- strcat(buf, "background-image:-webkit-linear-gradient(top,#3cb0fd,#1a5f8a);");
- strcat(buf, "background-image:linear-gradient(to bottom,#3cb0fd,#1a5f8a);");
- strcat(buf, "text-decoration:none;\"></form></span>");
- strcat(buf, "<p/><h2>How to use:</h2><ul>");
- strcat(buf, "<li>Select the Radio buttons to control the digital out pins.</li>");
- strcat(buf, "<li>Click 'Send-Refresh' to send.</li>");
- strcat(buf, "<li>Use the 'Send-Refresh' button to refresh the data.</li>");
- strcat(buf, "</ul>");
- strcat(buf, "</body></html>");
+ strcpy(webbuff, "<!DOCTYPE html>");
+ strcat(webbuff, "<html><head><title>ESP8266 Mbed</title></head>");
+ strcat(webbuff, "<body>");
+ strcat(webbuff, "<div style=\"text-align:center; background-color:#F4F4F4; color:#00AEDB;\"><h1>ESP8266 Mbed Web Controller</h1>");
+ strcat(webbuff, "Hit Count - ");
+ strcat(webbuff, webcount);
+ strcat(webbuff, "<br>Last Hit - ");
+ strcat(webbuff, lasthit);
+ strcat(webbuff, "</div><br /><hr>");
+ strcat(webbuff, "<h3>Mbed RTC Time -  ");
+ strcat(webbuff, timebuf);
+ strcat(webbuff, "</h3>\r\n");
+ strcat(webbuff, "<p><form method=\"POST\"><strong> Temperature:  <input type=\"text\" size=6 value=\"");
+ strcat(webbuff, Temp);
+ strcat(webbuff, "\"> <sup>O</sup>C <form method=\"POST\"> <strong>   Battery:  <input type=\"text\" size=4 value=\"");
+ strcat(webbuff, Vcc);
+ strcat(webbuff, "\"> </sup>V");
+ if(led1==1){strcat(webbuff, "<p><input type=\"radio\" name=\"led1\" value=\"0\" checked> Red LED off");
+ strcat(webbuff, "<br><input type=\"radio\" name=\"led1\" value=\"1\" > Red LED on");}
+ else{strcat(webbuff, "<p><input type=\"radio\" name=\"led1\" value=\"0\" > Red LED off");
+ strcat(webbuff, "<br><input type=\"radio\" name=\"led1\" value=\"1\" checked> Red LED on");}
+ if(Out1==0){strcat(webbuff, "<p><input type=\"radio\" name=\"Out1\" value=\"0\" checked> Digital Out 1 off");
+ strcat(webbuff, "<br><input type=\"radio\" name=\"Out1\" value=\"1\" > Digital Out 1 on");}
+ else{strcat(webbuff, "<p><input type=\"radio\" name=\"Out1\" value=\"0\" > Digital Out 1 off");
+ strcat(webbuff, "<br><input type=\"radio\" name=\"Out1\" value=\"1\" checked> Digital Out 1 on");}
+ if(Out2==0){strcat(webbuff, "<p><input type=\"radio\" name=\"Out2\" value=\"0\" checked> Digital Out 2 off");
+ strcat(webbuff, "<br><input type=\"radio\" name=\"Out2\" value=\"1\" > Digital Out 2 on");}
+ else{strcat(webbuff, "<p><input type=\"radio\" name=\"Out2\" value=\"0\" > Digital Out 2 off");
+ strcat(webbuff, "<br><input type=\"radio\" name=\"Out2\" value=\"1\" checked> Digital Out 2 on");}
+ if(Out3==0){strcat(webbuff, "<p><input type=\"radio\" name=\"Out3\" value=\"0\" checked> Digital Out 3 off");
+ strcat(webbuff, "<br><input type=\"radio\" name=\"Out3\" value=\"1\" > Digital Out 3 on");}
+ else{strcat(webbuff, "<p><input type=\"radio\" name=\"Out3\" value=\"0\" > Digital Out 3 off");
+ strcat(webbuff, "<br><input type=\"radio\" name=\"Out3\" value=\"1\" checked> Digital Out 3 on");}
+ if(In1==0){strcat(webbuff, "<p><input type=\"radio\" name=\"In1\" value=\"0\" > Digital In 1");}
+ else{strcat(webbuff, "<p><input type=\"radio\" name=\"In1\" value=\"1\" checked> Digital In 1");}
+ if(In2==0){strcat(webbuff, "<br><input type=\"radio\" name=\"In2\" value=\"0\" > Digital In 2");}
+ else{strcat(webbuff, "<br><input type=\"radio\" name=\"In2\" value=\"1\" checked> Digital In 2");}
+ if(In3==0){strcat(webbuff, "<br><input type=\"radio\" name=\"In3\" value=\"0\" > Digital In 3");}
+ else{strcat(webbuff, "<br><input type=\"radio\" name=\"In3\" value=\"1\" checked> Digital In 3");}
+ strcat(webbuff, "</strong><p><input type=\"submit\" value=\"send-refresh\" style=\"background: #3498db;");
+ strcat(webbuff, "background-image:-webkit-linear-gradient(top, #3498db, #2980b9);");
+ strcat(webbuff, "background-image:linear-gradient(to bottom, #3498db, #2980b9);");
+ strcat(webbuff, "-webkit-border-radius:12;border-radius: 12px;font-family: Arial;color:#ffffff;font-size:20px;padding:");
+ strcat(webbuff, "10px 20px 10px 20px; border:solid #103c57 3px;text-decoration: none;");
+ strcat(webbuff, "background: #3cb0fd;");
+ strcat(webbuff, "background-image:-webkit-linear-gradient(top,#3cb0fd,#1a5f8a);");
+ strcat(webbuff, "background-image:linear-gradient(to bottom,#3cb0fd,#1a5f8a);");
+ strcat(webbuff, "text-decoration:none;\"></form></span>");
+ strcat(webbuff, "<p/><h2>How to use:</h2><ul>");
+ strcat(webbuff, "<li>Select the Radio buttons to control the digital out pins.</li>");
+ strcat(webbuff, "<li>Click 'Send-Refresh' to send.</li>");
+ strcat(webbuff, "<li>Use the 'Send-Refresh' button to refresh the data.</li>");
+ strcat(webbuff, "</ul>");
+ strcat(webbuff, "</body></html>");
// end of WEB page data
- bufl = strlen(buf); // get total page buffer length
- sprintf(snd,"AT+CIPSEND=%s,%d\r\n", channel, bufl); // send IPD link channel and buffer character length.
- SendCMD();
- wait_ms(100);
+ bufl = strlen(webbuff); // get total page buffer length
+ sprintf(cmdbuff,"AT+CIPSEND=%d,%d\r\n", linkID, bufl); // send IPD link channel and buffer character length.
+ timeout=200;getcount=7;
+ SendCMD();
+ getreply();
SendWEB(); // send web page
- memset(buf, '\0', sizeof(buf));
+ memset(webbuff, '\0', sizeof(webbuff));
sendcheck();
}
-// wait for ESP "SEND OK" reply, then close IP to load web page, if lock out, system fully restarts
+// wait for ESP "SEND OK" reply, then close IP to load web page
void sendcheck()
{
- timeout=200;
- weberror=1;t2.reset();t2.start();
- while(weberror==1 && t2.read() <10){
+ weberror=1;timeout=500;getcount=24;
+ t2.reset();t2.start();
+ while(weberror==1 && t2.read() <5){
getreply();
- if (strstr(buf, "SEND OK") != NULL) {weberror=0;} // wait for valid SEND OK
+ if (strstr(replybuff, "SEND OK") != NULL) {weberror=0;} // wait for valid SEND OK
}
- t2.reset();
- if(weberror==1){
- pc.printf("\n\n\n ++++++++++ WEB Connect Error, restarting ... ++++++++++\n\n");
- NVIC_SystemReset();}
- strcpy(snd, "AT+CIPCLOSE=0\r\n");
- SendCMD();
+ if(weberror==1){ // restart connection
+ strcpy(cmdbuff, "AT+CIPMUX=1\r\n");
+ timeout=500;getcount=10;
+ SendCMD();getreply();
+ sprintf(cmdbuff,"AT+CIPSERVER=1,%d\r\n", port);
+ timeout=500;getcount=10;
+ SendCMD();getreply();
+ }
+ else{
+ sprintf(cmdbuff, "AT+CIPCLOSE=%s\r\n",channel); // close current connection
+ SendCMD();}
+ t2.reset();
}
// Reads and processes GET and POST web data
void ReadWebData()
{
- wait_ms(200);
- led3=0;
- count=0;DataRX=0;weberror=0;
- esp.attach(NULL);
- int x = strcspn (buf,"+");
+ wait_ms(200);
+ esp.attach(NULL);
+ count=0;DataRX=0;weberror=0;
+ memset(webdata, '\0', sizeof(webdata));
+ int x = strcspn (webbuff,"+");
if(x){
- strcpy(webdata, buf + x);weberror=0;
+ strcpy(webdata, webbuff + x);weberror=0;
int numMatched = sscanf(webdata,"+IPD,%d,%d:%s", &linkID, &ipdLen, type);
if( strstr(webdata, "led1=1") != NULL ) {led1=0;}
if( strstr(webdata, "led1=0") != NULL ) {led1=1;}
@@ -203,48 +210,51 @@
webcounter++;
sprintf(webcount, "%d",webcounter);
}
- else {strcpy(webdata, buf);weberror=1;}
- led3=1;
+ else {
+ memset(webbuff, '\0', sizeof(webbuff));
+ esp.attach(&callback);weberror=1;
+ }
}
// Starts and restarts webserver if errors detected.
void startserver()
{
- esp.attach(NULL);
- wait(1);
- gettime();
+ gettemp();gettime();
pc.printf("\n\n RTC time %s\r\n\n",timebuf);
pc.printf("++++++++++ Resetting ESP ++++++++++\r\n");
- strcpy(snd,"AT+RST\r\n");
+ strcpy(cmdbuff,"AT+RST\r\n");
+ timeout=2000;getcount=600;
SendCMD();
- timeout=2000;getcount=336;
getreply();
- if (strstr(buf, "ready") != NULL) {
+ pc.printf(replybuff);
+ pc.printf("%d",count);
+ if (strstr(replybuff, "OK") != NULL) {
pc.printf("\n++++++++++ Starting Server ++++++++++\r\n");
- strcpy(snd, "AT+CIPMUX=1\r\n"); // set multiple connections.
+ strcpy(cmdbuff, "AT+CIPMUX=1\r\n"); // set multiple connections.
+ timeout=500;getcount=10;
SendCMD();
- timeout=500;getcount=10;
getreply();
- strcpy(snd, "AT+CIPSERVER=1,90\r\n");
- //sprintf(snd,"AT+CIPSERVER=1,%d\r\n", port);
+ sprintf(cmdbuff,"AT+CIPSERVER=1,%d\r\n", port);
+ timeout=500;getcount=10;
SendCMD();
- timeout=500;getcount=10;
+ getreply();
+ sprintf(cmdbuff,"AT+CIPSTO=%d\r\n",SERVtimeout);
+ timeout=500;getcount=50;
+ SendCMD();
getreply();
pc.printf("\n Getting Server IP \r\n");
- strcpy(snd, "AT+CIFSR\r\n");
+ strcpy(cmdbuff, "AT+CIFSR\r\n");
timeout=1000;getcount=50;
while(weberror==0){
SendCMD();getreply();
- if (strstr(buf, "0.0.0.0") == NULL) {weberror=1;} // wait for valid IP
+ if (strstr(replybuff, "0.0.0.0") == NULL) {weberror=1;} // wait for valid IP
}
pc.printf("\n Enter WEB address in your browser \r\n\n");
- buf[strlen(buf) - 8] = '\0';
- char* IP = buf + 5;
- sprintf(snd," http://%s:%d", IP, port);
- pc.printf(snd);
- while (esp.readable()){esp.getc();}
- buflen=200;count=0;
- memset(buf, '\0', sizeof(buf));
+ replybuff[strlen(replybuff) - 8] = '\0';
+ char* IP = replybuff + 5;
+ sprintf(webdata," http://%s:%d", IP, port);
+ pc.printf(webdata);
led2=0;wait(2);led2=1;
+ bufflen=200;count=0;
pc.printf("\n\n++++++++++ Ready ++++++++++\r\n\n");
esp.attach(&callback);
}
@@ -257,25 +267,24 @@
// ESP Command data send
void SendCMD()
{
- esp.printf("%s", snd);
+ esp.printf("%s", cmdbuff);
}
// Large WEB buffer data send
void SendWEB()
{
int i=0;
if(esp.writeable()) {
- while(buf[i]!='\0') {esp.putc(buf[i]);i++;}
+ while(webbuff[i]!='\0') {esp.putc(webbuff[i]);i++;}
}
}
// Get Cammand and ESP status replies
void getreply()
{
- memset(buf, '\0', sizeof(buf));
- t1.reset(); t1.start();
- ended=0;count=0;
- while(t1.read_ms()< timeout && count < getcount) {
+ memset(replybuff, '\0', sizeof(replybuff));
+ t1.reset(); t1.start();replycount=0;
+ while(t1.read_ms()< timeout && replycount < getcount) {
if(esp.readable()) {
- buf[count] = esp.getc();count++;
+ replybuff[replycount] = esp.getc();replycount++;
}
}
t1.stop();