Kehinde Aina
ECE 4180 Final project: Kehinde, Marcus, Chidi, Sulemana
Dependencies: Camera_LS_Y201 SDHCFileSystem mbed wavfile
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HUZZAHESP8266-web-control-LPC1768
by 
Austin Dong
main.cpp
- Committer:
- 4180_1
- Date:
- 2015-08-28
- Revision:
- 4:40dd020463ea
- Parent:
- 3:f7febfa77784
- Child:
- 5:bc0296a5ad8a
File content as of revision 4:40dd020463ea:
// ESP8266 Static page WEB server to control Mbed
#include "mbed.h"
//#include "DS18B20.h"
Serial pc(USBTX, USBRX);
Serial esp(p28, p27); // tx, rx
//DS18B20 thermom(A0, DS18B20::RES_12_BIT);
// Standard Mbed LED definitions
DigitalOut led1(LED1); // (PTB18)
DigitalOut led2(LED2); // (PTB19)
DigitalOut led3(LED3); // (PTD1)
// Digital Out and In pins, can be configured to any suitable pin depending on Platform
DigitalOut Out1(p6);
DigitalOut Out2(p7);
DigitalOut Out3(p8);
DigitalOut reset(p26);
DigitalIn In1(p9);
DigitalIn In2(p10);
DigitalIn In3(p11);
PwmOut speaker(p21);
AnalogIn Ain1(p18);
AnalogIn Ain2(p19);
Timer t1;
Timer t2;
struct tm t;
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
char Vcc[10];
char Temp[10];
char temp[10];
char webcount[8];
char lasthit[30];
char timebuf[30];
char type[16];
char type1[16];
char channel[2];
char cmdbuff[32];
char replybuff[1024];
char webdata[1024]; // This may need to be bigger depending on WEB browser used
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 =00; // 0-59
int hour =12; // 2-23
int dayofmonth =26; // 1-31
int month =8; // 1-12
int year =15; // last 2 digits
int port =80; // set server port
int SERVtimeout =5; // set server timeout in seconds in case link breaks.
// Serial Interrupt read ESP data
void callback()
{
led3=1;
while (esp.readable()) {
webbuff[count] = esp.getc();
count++;
}
if(strlen(webbuff)>bufflen) {
DataRX=1;
led3=0;
}
}
int main()
{
reset=0;
pc.baud(115200);
pc.printf("\f\n\r------------ ESP8266 Hardware Reset --------------\n\r");
wait(0.5);
reset=1;
led1=1,led2=0,led3=0;
timeout=6000;
getcount=500;
getreply();
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) {
if(DataRX==1) {
ReadWebData();
beep();
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");
strcpy(lasthit, timebuf);
servreq=0;
}
}
}
// Static WEB page
void sendpage()
{
gettemp();
getbattery();
gettime();
// WEB page data
strcpy(webbuff, "<!DOCTYPE html>");
strcat(webbuff, "<html><head><title>ESP8266 Mbed LPC1768</title></head>");
strcat(webbuff, "<body>");
strcat(webbuff, "<div style=\"text-align:center; background-color:#F4F4F4; color:#00AEDB;\"><h1>ESP8266 Mbed IoT 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> Analog 1:  <input type=\"text\" size=6 value=\"");
strcat(webbuff, Temp);
strcat(webbuff, "\"> </sup>V <form method=\"POST\"> <strong>   Analog 2:  <input type=\"text\" size=4 value=\"");
strcat(webbuff, Vcc);
strcat(webbuff, "\"> </sup>V");
if(led1==0) {
strcat(webbuff, "<p><input type=\"radio\" name=\"led1\" value=\"0\" checked> LED 1 off");
strcat(webbuff, "<br><input type=\"radio\" name=\"led1\" value=\"1\" > LED 1 on");
} else {
strcat(webbuff, "<p><input type=\"radio\" name=\"led1\" value=\"0\" > LED 1 off");
strcat(webbuff, "<br><input type=\"radio\" name=\"led1\" value=\"1\" checked> LED 1 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(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(webbuff, '\0', sizeof(webbuff));
sendcheck();
}
// wait for ESP "SEND OK" reply, then close IP to load web page
void sendcheck()
{
weberror=1;
timeout=500;
getcount=24;
t2.reset();
t2.start();
while(weberror==1 && t2.read() <5) {
getreply();
if (strstr(replybuff, "SEND OK") != NULL) {
weberror=0; // wait for valid SEND OK
}
}
if(weberror==1) { // restart connection
strcpy(cmdbuff, "AT+CIPMUX=1\r\n");
timeout=500;
getcount=10;
SendCMD();
getreply();
pc.printf(replybuff);
sprintf(cmdbuff,"AT+CIPSERVER=1,%d\r\n", port);
timeout=500;
getcount=10;
SendCMD();
getreply();
pc.printf(replybuff);
} else {
sprintf(cmdbuff, "AT+CIPCLOSE=%s\r\n",channel); // close current connection
SendCMD();
getreply();
pc.printf(replybuff);
}
t2.reset();
}
// Reads and processes GET and POST web data
void ReadWebData()
{
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, webbuff + x);
weberror=0;
int numMatched = sscanf(webdata,"+IPD,%d,%d:%s", &linkID, &ipdLen, type);
if( strstr(webdata, "led1=1") != NULL ) {
led1=1;
}
if( strstr(webdata, "led1=0") != NULL ) {
led1=0;
}
if( strstr(webdata, "Out1=1") != NULL ) {
Out1=1;
}
if( strstr(webdata, "Out1=0") != NULL ) {
Out1=0;
}
if( strstr(webdata, "Out2=1") != NULL ) {
Out2=1;
}
if( strstr(webdata, "Out2=0") != NULL ) {
Out2=0;
}
if( strstr(webdata, "Out3=1") != NULL ) {
Out3=1;
}
if( strstr(webdata, "Out3=0") != NULL ) {
Out3=0;
}
sprintf(channel, "%d",linkID);
if (strstr(webdata, "GET") != NULL) {
servreq=1;
}
if (strstr(webdata, "POST") != NULL) {
servreq=1;
}
webcounter++;
sprintf(webcount, "%d",webcounter);
} else {
memset(webbuff, '\0', sizeof(webbuff));
esp.attach(&callback);
weberror=1;
}
}
// Starts and restarts webserver if errors detected.
void startserver()
{
gettemp();
gettime();
pc.printf("\n\n RTC time %s\r\n\n",timebuf);
pc.printf("++++++++++ Resetting ESP ++++++++++\r\n");
strcpy(cmdbuff,"AT+RST\r\n");
timeout=8000;
getcount=1000;
SendCMD();
getreply();
pc.printf(replybuff);
pc.printf("%d",count);
if (strstr(replybuff, "OK") != NULL) {
pc.printf("\n++++++++++ Starting Server ++++++++++\r\n");
strcpy(cmdbuff, "AT+CIPMUX=1\r\n"); // set multiple connections.
timeout=500;
getcount=20;
SendCMD();
getreply();
pc.printf(replybuff);
sprintf(cmdbuff,"AT+CIPSERVER=1,%d\r\n", port);
timeout=500;
getcount=20;
SendCMD();
getreply();
pc.printf(replybuff);
wait(1);
sprintf(cmdbuff,"AT+CIPSTO=%d\r\n",SERVtimeout);
timeout=500;
getcount=50;
SendCMD();
getreply();
pc.printf(replybuff);
wait(5);
pc.printf("\n Getting Server IP \r\n");
strcpy(cmdbuff, "AT+CIFSR\r\n");
timeout=2500;
getcount=200;
while(weberror==0) {
SendCMD();
getreply();
if (strstr(replybuff, "0.0.0.0") == NULL) {
weberror=1; // wait for valid IP
}
}
pc.printf("\n Enter WEB address (IP) found below in your browser \r\n\n");
pc.printf("\n The MAC address is also shown below,if it is needed \r\n\n");
replybuff[strlen(replybuff)-1] = '\0';
//char* IP = replybuff + 5;
sprintf(webdata,"%s", replybuff);
pc.printf(webdata);
led2=1;
bufflen=200;
count=0;
pc.printf("\n\n++++++++++ Ready ++++++++++\r\n\n");
esp.attach(&callback);
} else {
pc.printf("\n++++++++++ ESP8266 error, check power/connections ++++++++++\r\n");
while(1) {}
}
t2.reset();
t2.start();
beep();
}
// ESP Command data send
void SendCMD()
{
esp.printf("%s", cmdbuff);
}
// Large WEB buffer data send
void SendWEB()
{
int i=0;
if(esp.writeable()) {
while(webbuff[i]!='\0') {
esp.putc(webbuff[i]);
i++;
}
}
}
// Get Command and ESP status replies
void getreply()
{
memset(replybuff, '\0', sizeof(replybuff));
t1.reset();
t1.start();
replycount=0;
while(t1.read_ms()< timeout && replycount < getcount) {
if(esp.readable()) {
replybuff[replycount] = esp.getc();
replycount++;
}
}
t1.stop();
}
// Analog in example
void getbattery()
{
AdcIn=Ain1.read();
Ht = (AdcIn*3.3); // set the numeric to the exact MCU analog reference voltage for greater accuracy
sprintf(Vcc,"%2.3f",Ht);
}
// Temperature example
void gettemp()
{
AdcIn=Ain2.read();
Ht = (AdcIn*3.3); // set the numeric to the exact MCU analog reference voltage for greater accuracy
sprintf(Temp,"%2.3f",Ht);
}
// Get RTC time
void gettime()
{
time_t seconds = time(NULL);
strftime(timebuf,50,"%H:%M:%S %a %d %b %y", localtime(&seconds));
}
void beep()
{
speaker.period(1.0/2000); // 2000hz period
speaker = 0.5; //50% duty cycle - max volume
wait_ms(60);
speaker=0.0; // turn off audio
}
void setRTC()
{
t.tm_sec = (0); // 0-59
t.tm_min = (minute); // 0-59
t.tm_hour = (hour); // 0-23
t.tm_mday = (dayofmonth); // 1-31
t.tm_mon = (month-1); // 0-11 "0" = Jan, -1 added for Mbed RCT clock format
t.tm_year = ((year)+100); // year since 1900, current DCF year + 100 + 1900 = correct year
set_time(mktime(&t)); // set RTC clock
}